From owner-fsj-digest-at-digest.net Sat Jun 30 08:28:00 2012 From: fsj-digest To: fsj-digest-at-digest.net Date: Sat, 30 Jun 2012 15:28:07 +0000 Subject: fsj-digest V1 #3940 fsj-digest Saturday, June 30 2012 Volume 01 : Number 3940 Forum for Discussion of Full Sized SJ Series Jeeps Brian Colucci Digest Coordinator Contents: RE: fsj: Re: gearing Q fsj: Re: XJ RE GEAR Re: fsj: Re: XJ RE GEAR fsj: Re: XJ RE GEAR RE: fsj: Re: XJ RE GEAR RE: fsj: Re: XJ RE GEAR RE: fsj: Re: XJ RE GEAR RE: fsj: Re: gearing Q Re: fsj: Re: gearing Q fsj: decision made... RE: fsj: Re: gearing Q Re: xj: RE: fsj: Re: gearing Q RE: fsj: Re: gearing Q Re: xj: RE: fsj: Re: gearing Q- one more thing... FSJ Digest Home Page: http://www.digest.net/jeeps/fsj/ Send submissions to fsj-digest-at-digest.net Send administrative requests to fsj-digest-request-at-digest.net To unsubscribe, include the word unsubscribe by itself in the body of the message, unless you are sending the request from a different address than the one that appears on the list. Include the word help in a message to fsj-digest-request to get a list of other majordomo commands. ---------------------------------------------------------------------- Date: Fri, 29 Jun 2012 13:11:46 -0700 From: Jim Blair Subject: RE: fsj: Re: gearing Q I agree on the 3.73 ratio up to 33" tires. I went with 4.10s on Black jack due to 38" tires going onto it. Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > Date: Fri, 29 Jun 2012 11:16:20 -0700 > From: john-at-wagoneers.com > To: profesor4x4-at-hotmail.com > CC: fsj-at-digest.net; xj-at-digest.net > Subject: fsj: Re: gearing Q > > good question... let's share this one with the XJ list... > > When I had 30x9.5's on my XJ with 4.10s it seemed to work well, > how big are the tires on your stock XJ dan? > > how fast will you drive it without a load? if over 60, go with 3.73, > otherwise 4.10 is a happy range with bigger tires... > > if stock tire size and freeway I'd say 3.73. > > I've found that with older Jeeps like the big wagoneers and such > that a 3.73 is a good ratio for both trail and highway... with > an overdrive trans you have a lot more flexibility.... > > do the math, what's the peak torque RPM, figure your towing speed > and make tire size and gears work... > > (pretend this says XJ... ;) > http://wagoneers.com/FSJ/tech/fsjgears.html > > happy shopping. > john > > > ----- > Linux: the choice of a GNU generation > - ---------------------------------------------------------------------------- > -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS > Snohomish, Washington - where Jeeps and Diesels don't rust, they mold > - ---------------------------------------------------------------------------- > "A thorough knowledge of the Bible is worth more than a college education" > Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) > - ---------------------------------------------------------------------------- > support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 > - ---------------------------------------------------------------------------- > > On Fri, 29 Jun 2012, El PROFESOR 4X4 wrote: > > # > # Hi John > # > # I4m about to start towing my big XJ behind my stock XJ with an AW4 auto and > 3.55s...should I regear? To 3.73 or 4.10? > # > # THX, > # > # Dan > # ------------------------------ Date: Fri, 29 Jun 2012 15:13:38 -0600 From: Troy Phagan Subject: fsj: Re: XJ RE GEAR RE: XJ RE GEARING Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 If you are lucky, you can sometimes find the axle ratios you need in a useable axle assembly in the swap yards / craigslist / 4x4 swap meets, etc, and just bolt in the complete axle assembly to save the time and labor of re-gearing the axles you have. For the rear, you could hold your breathe and try to find a D44, but I'd go for the Chrysler 8.25 over the Dana 35. Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. (Unless that's what yours has.... and you want to keep it.) Good Luck! ------------------------------ Date: Fri, 29 Jun 2012 14:19:41 -0700 (PDT) From: john Subject: Re: fsj: Re: XJ RE GEAR the 2.5L's often came with 4.10s... john ----- Linux: the choice of a GNU generation - ---------------------------------------------------------------------------- -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS Snohomish, Washington - where Jeeps and Diesels don't rust, they mold - ---------------------------------------------------------------------------- "A thorough knowledge of the Bible is worth more than a college education" Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) - ---------------------------------------------------------------------------- support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 - ---------------------------------------------------------------------------- On Fri, 29 Jun 2012, Troy Phagan wrote: # RE: XJ RE GEARING # # Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 # # If you are lucky, you can sometimes find the axle ratios you need in a # useable axle assembly in the swap yards / craigslist / 4x4 swap meets, etc, # and just bolt in the complete axle assembly to save the time and labor of # re-gearing the axles you have. For the rear, you could hold your breathe and # try to find a D44, but I'd go for the Chrysler 8.25 over the Dana 35. # # Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. (Unless # that's what yours has.... and you want to keep it.) # # Good Luck! # ------------------------------ Date: Fri, 29 Jun 2012 15:13:38 -0600 From: Troy Phagan Subject: fsj: Re: XJ RE GEAR RE: XJ RE GEARING Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 If you are lucky, you can sometimes find the axle ratios you need in a useable axle assembly in the swap yards / craigslist / 4x4 swap meets, etc, and just bolt in the complete axle assembly to save the time and labor of re-gearing the axles you have. For the rear, you could hold your breathe and try to find a D44, but I'd go for the Chrysler 8.25 over the Dana 35. Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. (Unless that's what yours has.... and you want to keep it.) Good Luck! ------------------------------ Date: Fri, 29 Jun 2012 15:26:19 -0700 From: Jim Blair Subject: RE: fsj: Re: XJ RE GEAR I was looking for the rare Model 20 from a Comanche (86-early 88 only) with 1 piece axles that only came in the Metric Tonne package. They had 2 ratios (3.08 with auto which i wanted forcmy Eagle wagon and 3.55 with 5 speed) plus they were factory 1 piece shafts. > Date: Fri, 29 Jun 2012 15:13:38 -0600 > From: tsp-at-crptruck.com > To: fsj-at-digest.net > CC: owner-fsj-digest-at-digest.net; fsj-digest-at-digest.net > Subject: fsj: Re: XJ RE GEAR > > RE: XJ RE GEARING > > Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 > > If you are lucky, you can sometimes find the axle ratios you need in a > useable axle assembly in the swap yards / craigslist / 4x4 swap meets, > etc, and just bolt in the complete axle assembly to save the time and > labor of re-gearing the axles you have. For the rear, you could hold > your breathe and try to find a D44, but I'd go for the Chrysler 8.25 > over the Dana 35. > > Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. > (Unless that's what yours has.... and you want to keep it.) > > Good Luck! ------------------------------ Date: Fri, 29 Jun 2012 15:32:15 -0700 From: Jim Blair Subject: RE: fsj: Re: XJ RE GEAR They also neglected to mention the economy package with 2.72 and 4.0 L and 4 speed in '87. Even my '83 Eagle has that setup (I'm pulling those both axles for an 8.25 XJ rear axle swap and non-vacuum matching 3.08 ratio front) > Date: Fri, 29 Jun 2012 15:13:38 -0600 > From: tsp-at-crptruck.com > To: fsj-at-digest.net > CC: owner-fsj-digest-at-digest.net; fsj-digest-at-digest.net > Subject: fsj: Re: XJ RE GEAR > > RE: XJ RE GEARING > > Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 > > If you are lucky, you can sometimes find the axle ratios you need in a > useable axle assembly in the swap yards / craigslist / 4x4 swap meets, > etc, and just bolt in the complete axle assembly to save the time and > labor of re-gearing the axles you have. For the rear, you could hold > your breathe and try to find a D44, but I'd go for the Chrysler 8.25 > over the Dana 35. > > Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. > (Unless that's what yours has.... and you want to keep it.) > > Good Luck! ------------------------------ Date: Fri, 29 Jun 2012 15:47:43 -0700 (PDT) From: john Subject: RE: fsj: Re: XJ RE GEAR they NEVER used 2.72s on XJs... while the manual doesn't show it, I have seen 3.07's on an XJ... they only did that for a few years in the early '80s on SJs... by '84 or so they were using 3.54/3.31 I think the latest I've seen a 2.72 was '83 on my j10... here's the facts: XJ CODES: - ------------ right out of the MR244, pg H-5 (1984 - 86 model years - XJ only) All Ring gear diameters are 192mm (7-9/16") Double the Axle Code letter for Trac-Lok Diffs Axle Code Letter - Axle Ratio - Pinion/Ring gears - ------------------------------------------------- S - 3.73:1 - 11/41 T - 3.31:1 - 13/43 E - 3.54:1 - 13/46 K - 4.11:1 - 9/37 SJ CODES: - ------------ right out of the MR253, pg H-2 no info on ring gear diameter offered. double the letter codes for Trac-Lok D - 2.73 - 15/41 B - 3.31 - 13/43 A - 3.54 - 11/39 H - 3.73 - 11/41 C - 4.10 - 10/41 just the facts... http://wagoneers.com/XJ/axle-ratio-info.txt john ----- Linux: the choice of a GNU generation - ---------------------------------------------------------------------------- -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS Snohomish, Washington - where Jeeps and Diesels don't rust, they mold - ---------------------------------------------------------------------------- "A thorough knowledge of the Bible is worth more than a college education" Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) - ---------------------------------------------------------------------------- support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 - ---------------------------------------------------------------------------- On Fri, 29 Jun 2012, Jim Blair wrote: # They also neglected to mention the economy package with 2.72 and 4.0 L and 4 # speed in '87. Even my '83 Eagle has that setup (I'm pulling those both axles # for an 8.25 XJ rear axle swap and non-vacuum matching 3.08 ratio front) # # > Date: Fri, 29 Jun 2012 15:13:38 -0600 # > From: tsp-at-crptruck.com # > To: fsj-at-digest.net # > CC: owner-fsj-digest-at-digest.net; fsj-digest-at-digest.net # > Subject: fsj: Re: XJ RE GEAR # > # > RE: XJ RE GEARING # > # > Here's some nice info: http://naxja.net/forum/showthread.php?p=245480473 # > # > If you are lucky, you can sometimes find the axle ratios you need in a # > useable axle assembly in the swap yards / craigslist / 4x4 swap meets, # > etc, and just bolt in the complete axle assembly to save the time and # > labor of re-gearing the axles you have. For the rear, you could hold # > your breathe and try to find a D44, but I'd go for the Chrysler 8.25 # > over the Dana 35. # > # > Assuming 4x4, I'd avoid the vacuum disconnect version front Dana30. # > (Unless that's what yours has.... and you want to keep it.) # > # > Good Luck! # ------------------------------ Date: Fri, 29 Jun 2012 16:33:40 -0700 From: "James D. Sterling" Subject: RE: fsj: Re: gearing Q 4:30's on 35's for my 1980 J10/20 Jim Sterling jsterling-at-sterlingnetworks.net 805-579-8998 Founding Partner SMBTN www.smbtn.org - -----Original Message----- From: owner-fsj-at-digest.net [mailto:owner-fsj-at-digest.net] On Behalf Of Jim Blair Sent: Friday, June 29, 2012 1:12 PM To: john Meister; profesor4x4-at-hotmail.com Cc: local Jeep list; xj Subject: RE: fsj: Re: gearing Q I agree on the 3.73 ratio up to 33" tires. I went with 4.10s on Black jack due to 38" tires going onto it. Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > Date: Fri, 29 Jun 2012 11:16:20 -0700 > From: john-at-wagoneers.com > To: profesor4x4-at-hotmail.com > CC: fsj-at-digest.net; xj-at-digest.net > Subject: fsj: Re: gearing Q > > good question... let's share this one with the XJ list... > > When I had 30x9.5's on my XJ with 4.10s it seemed to work well, how > big are the tires on your stock XJ dan? > > how fast will you drive it without a load? if over 60, go with 3.73, > otherwise 4.10 is a happy range with bigger tires... > > if stock tire size and freeway I'd say 3.73. > > I've found that with older Jeeps like the big wagoneers and such that > a 3.73 is a good ratio for both trail and highway... with an overdrive > trans you have a lot more flexibility.... > > do the math, what's the peak torque RPM, figure your towing speed and > make tire size and gears work... > > (pretend this says XJ... ;) > http://wagoneers.com/FSJ/tech/fsjgears.html > > happy shopping. > john > > > ----- > Linux: the choice of a GNU generation > - ---------------------------------------------------------------------------- > -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS > Snohomish, Washington - where Jeeps and Diesels don't rust, they > mold > - ---------------------------------------------------------------------------- > "A thorough knowledge of the Bible is worth more than a college education" > Theodore Roosevelt (American 26th US President (1901-09), > 1858-1919) > - ---------------------------------------------------------------------------- > support WAGONEERS.COM:buy AMSOIL-at-: > http://AMSOIL.com/redirect.cgi?zo=283461 > - ---------------------------------------------------------------------------- > > On Fri, 29 Jun 2012, El PROFESOR 4X4 wrote: > > # > # Hi John > # > # I4m about to start towing my big XJ behind my stock XJ with an AW4 > auto and > 3.55s...should I regear? To 3.73 or 4.10? > # > # THX, > # > # Dan > # ------------------------------ Date: Fri, 29 Jun 2012 20:11:13 -0400 From: "Neal Hoover" Subject: Re: fsj: Re: gearing Q 4.88s in my XJ running 36" SXs 4:1 t-case gears help, too! ; ) Neal A. Hoover Project '76 J-10 Project '96 XJ http://community.webshots.com/user/proj96xj - ----- Original Message ----- From: "James D. Sterling" To: "Jim Blair" ; "john Meister" ; Cc: "local Jeep list" ; "xj" Sent: Friday, June 29, 2012 7:33 PM Subject: RE: fsj: Re: gearing Q > 4:30's on 35's for my 1980 J10/20 > > > Jim Sterling > jsterling-at-sterlingnetworks.net > 805-579-8998 > Founding Partner SMBTN > www.smbtn.org > > > > -----Original Message----- > From: owner-fsj-at-digest.net [mailto:owner-fsj-at-digest.net] On Behalf Of Jim > Blair > Sent: Friday, June 29, 2012 1:12 PM > To: john Meister; profesor4x4-at-hotmail.com > Cc: local Jeep list; xj > Subject: RE: fsj: Re: gearing Q > > I agree on the 3.73 ratio up to 33" tires. I went with 4.10s on Black jack > due > to 38" tires going onto it. > > Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > > >> Date: Fri, 29 Jun 2012 11:16:20 -0700 >> From: john-at-wagoneers.com >> To: profesor4x4-at-hotmail.com >> CC: fsj-at-digest.net; xj-at-digest.net >> Subject: fsj: Re: gearing Q >> >> good question... let's share this one with the XJ list... >> >> When I had 30x9.5's on my XJ with 4.10s it seemed to work well, how >> big are the tires on your stock XJ dan? >> >> how fast will you drive it without a load? if over 60, go with 3.73, >> otherwise 4.10 is a happy range with bigger tires... >> >> if stock tire size and freeway I'd say 3.73. >> >> I've found that with older Jeeps like the big wagoneers and such that >> a 3.73 is a good ratio for both trail and highway... with an overdrive >> trans you have a lot more flexibility.... >> >> do the math, what's the peak torque RPM, figure your towing speed and >> make tire size and gears work... >> >> (pretend this says XJ... ;) >> http://wagoneers.com/FSJ/tech/fsjgears.html >> >> happy shopping. >> john >> >> >> ----- >> Linux: the choice of a GNU generation >> > ---------------------------------------------------------------------------- >> -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS >> Snohomish, Washington - where Jeeps and Diesels don't rust, they >> mold >> > ---------------------------------------------------------------------------- >> "A thorough knowledge of the Bible is worth more than a college >> education" >> Theodore Roosevelt (American 26th US President (1901-09), >> 1858-1919) >> > ---------------------------------------------------------------------------- >> support WAGONEERS.COM:buy AMSOIL-at-: >> http://AMSOIL.com/redirect.cgi?zo=283461 >> > ---------------------------------------------------------------------------- >> >> On Fri, 29 Jun 2012, El PROFESOR 4X4 wrote: >> >> # >> # Hi John >> # >> # I4m about to start towing my big XJ behind my stock XJ with an AW4 >> auto > and >> 3.55s...should I regear? To 3.73 or 4.10? >> # >> # THX, >> # >> # Dan >> # ------------------------------ Date: Fri, 29 Jun 2012 18:36:56 -0700 (PDT) From: john Subject: fsj: decision made... the benz just sold... delivering to seattle now... :) looks like I'm keeping the silver jetta, with the silver liberty and a silver suburban. :) ----- Linux: the choice of a GNU generation - ---------------------------------------------------------------------------- -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS Snohomish, Washington - where Jeeps and Diesels don't rust, they mold - ---------------------------------------------------------------------------- "A thorough knowledge of the Bible is worth more than a college education" Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) - ---------------------------------------------------------------------------- support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 - ---------------------------------------------------------------------------- ------------------------------ Date: Sat, 30 Jun 2012 07:20:07 -0700 From: Jim Blair Subject: RE: fsj: Re: gearing Q I also have 4:1 in Blackjack (NV241 OR) Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > From: proj96xj-at-insightbb.com > To: jsterling-at-sterlingnetworks.net; carnuck-at-hotmail.com; john-at-wagoneers.com; profesor4x4-at-hotmail.com > CC: fsj-at-digest.net; xj-at-digest.net > Subject: Re: fsj: Re: gearing Q > Date: Fri, 29 Jun 2012 20:11:13 -0400 > > 4.88s in my XJ running 36" SXs > 4:1 t-case gears help, too! > ; ) > > Neal A. Hoover > Project '76 J-10 > Project '96 XJ > http://community.webshots.com/user/proj96xj ------------------------------ Date: Sat, 30 Jun 2012 14:53:00 +0000 From: john Subject: Re: xj: RE: fsj: Re: gearing Q Let me run some numbers, might be monday before I have time. Remind me then and I'll build a spreadsheet, or find one. May be on my server. - ------Original Message------ From: Dan Starc Sender: owner-xj-at-digest.net To: Jim Blair-email To: proj96xj-at-insightbb.com To: jsterling-at-sterlingnetworks.net To: J Cc: FSJ Cc: xj ReplyTo: xj Subject: xj: RE: fsj: Re: gearing Q Sent: Jun 30, 2012 07:39 I found out I have 3.55s on it. So, final question: for towing, should I go to 3.73 or 4.10? No tire change involved. Thanks! Dan From: carnuck-at-hotmail.com To: proj96xj-at-insightbb.com; jsterling-at-sterlingnetworks.net; john-at-wagoneers.com; profesor4x4-at-hotmail.com CC: fsj-at-digest.net; xj-at-digest.net Subject: RE: fsj: Re: gearing Q Date: Sat, 30 Jun 2012 07:20:07 -0700 I also have 4:1 in Blackjack (NV241 OR) Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 > From: proj96xj-at-insightbb.com > To: jsterling-at-sterlingnetworks.net; carnuck-at-hotmail.com; john-at-wagoneers.com; profesor4x4-at-hotmail.com > CC: fsj-at-digest.net; xj-at-digest.net > Subject: Re: fsj: Re: gearing Q > Date: Fri, 29 Jun 2012 20:11:13 -0400 > > 4.88s in my XJ running 36" SXs > 4:1 t-case gears help, too! > ; ) > > Neal A. Hoover > Project '76 J-10 > Project '96 XJ > http://community.webshots.com/user/proj96xj __john_at_http://wagoneers.com__ ------------------------------ Date: Sat, 30 Jun 2012 08:25:50 -0700 (PDT) From: john Subject: RE: fsj: Re: gearing Q sounds about right... ----- Linux: the choice of a GNU generation - ---------------------------------------------------------------------------- -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS Snohomish, Washington - where Jeeps and Diesels don't rust, they mold - ---------------------------------------------------------------------------- "A thorough knowledge of the Bible is worth more than a college education" Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) - ---------------------------------------------------------------------------- support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 - ---------------------------------------------------------------------------- On Sat, 30 Jun 2012, El PROFESOR 4X4 wrote: # # so, 4.10 would be too much? with the auto at 70 mph would bring my rpms up from 2000 to 2350...too much difference? # thanks again Jim! # Dan # # From: carnuck-at-hotmail.com # To: john-at-wagoneers.com; profesor4x4-at-hotmail.com # CC: fsj-at-digest.net; xj-at-digest.net # Subject: RE: fsj: Re: gearing Q # Date: Fri, 29 Jun 2012 13:11:46 -0700 # # # # # # I agree on the 3.73 ratio up to 33" tires. I went with 4.10s on Black jack due to 38" tires going onto it. # # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 # # # > Date: Fri, 29 Jun 2012 11:16:20 -0700 # > From: john-at-wagoneers.com # > To: profesor4x4-at-hotmail.com # > CC: fsj-at-digest.net; xj-at-digest.net # > Subject: fsj: Re: gearing Q # > # > good question... let's share this one with the XJ list... # > # > When I had 30x9.5's on my XJ with 4.10s it seemed to work well, # > how big are the tires on your stock XJ dan? # > # > how fast will you drive it without a load? if over 60, go with 3.73, # > otherwise 4.10 is a happy range with bigger tires... # > # > if stock tire size and freeway I'd say 3.73. # > # > I've found that with older Jeeps like the big wagoneers and such # > that a 3.73 is a good ratio for both trail and highway... with # > an overdrive trans you have a lot more flexibility.... # > # > do the math, what's the peak torque RPM, figure your towing speed # > and make tire size and gears work... # > # > (pretend this says XJ... ;) # > http://wagoneers.com/FSJ/tech/fsjgears.html # > # > happy shopping. # > john # > # > # > ----- # > Linux: the choice of a GNU generation # > ---------------------------------------------------------------------------- # > -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS # > Snohomish, Washington - where Jeeps and Diesels don't rust, they mold # > ---------------------------------------------------------------------------- # > "A thorough knowledge of the Bible is worth more than a college education" # > Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) # > ---------------------------------------------------------------------------- # > support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 # > ---------------------------------------------------------------------------- # > # > On Fri, 29 Jun 2012, El PROFESOR 4X4 wrote: # > # > # # > # Hi John # > # # > # I4m about to start towing my big XJ behind my stock XJ with an AW4 auto and # > 3.55s...should I regear? To 3.73 or 4.10? # > # # > # THX, # > # # > # Dan # > # # ------------------------------ Date: Sat, 30 Jun 2012 08:27:59 -0700 (PDT) From: john Subject: Re: xj: RE: fsj: Re: gearing Q- one more thing... http://wagoneers.com/FSJ/tech/fsjgears.html speed = (rpm * dia * pi * 60) / (gears *12 *5280) speed = (rpm * dia * 188.496) / (gears * 63360) gears = (rpm * dia * pi * 60) / (speed *12 *5280) rpm = (speed * gears * 12 * 5280) / (dia * pi * 60) I've got this figured out for 3.55's with different tire sizes... did you look at the link dan? john ----- Linux: the choice of a GNU generation - ---------------------------------------------------------------------------- -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS Snohomish, Washington - where Jeeps and Diesels don't rust, they mold - ---------------------------------------------------------------------------- "A thorough knowledge of the Bible is worth more than a college education" Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) - ---------------------------------------------------------------------------- support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 - ---------------------------------------------------------------------------- On Sat, 30 Jun 2012, El PROFESOR 4X4 wrote: # some of the roads are NOT freeways, but two-way two-lanes and sometimes # steep...I have brakes on the trailer just in case...so, does this justify the # 4.10s over the 3.73s? # Dan # # From: carnuck-at-hotmail.com # To: john-at-wagoneers.com; profesor4x4-at-hotmail.com # CC: fsj-at-digest.net; xj-at-digest.net # Subject: RE: fsj: Re: gearing Q # Date: Fri, 29 Jun 2012 13:11:46 -0700 # # # # # # I agree on the 3.73 ratio up to 33" tires. I went with 4.10s on Black jack due # to 38" tires going onto it. # # Jim Blair, Lynnwood, WA '87 Comanche, '83 Jeep J10, '84 Jeep J10 # # # > Date: Fri, 29 Jun 2012 11:16:20 -0700 # > From: john-at-wagoneers.com # > To: profesor4x4-at-hotmail.com # > CC: fsj-at-digest.net; xj-at-digest.net # > Subject: fsj: Re: gearing Q # > # > good question... let's share this one with the XJ list... # > # > When I had 30x9.5's on my XJ with 4.10s it seemed to work well, # > how big are the tires on your stock XJ dan? # > # > how fast will you drive it without a load? if over 60, go with 3.73, # > otherwise 4.10 is a happy range with bigger tires... # > # > if stock tire size and freeway I'd say 3.73. # > # > I've found that with older Jeeps like the big wagoneers and such # > that a 3.73 is a good ratio for both trail and highway... with # > an overdrive trans you have a lot more flexibility.... # > # > do the math, what's the peak torque RPM, figure your towing speed # > and make tire size and gears work... # > # > (pretend this says XJ... ;) # > http://wagoneers.com/FSJ/tech/fsjgears.html # > # > happy shopping. # > john # > # > # > ----- # > Linux: the choice of a GNU generation # > # ---------------------------------------------------------------------------- # > -o|||||o- john-at- http://WAGONEERS.COM TRSTGZS # > Snohomish, Washington - where Jeeps and Diesels don't rust, they mold # > # ---------------------------------------------------------------------------- # > "A thorough knowledge of the Bible is worth more than a college education" # > Theodore Roosevelt (American 26th US President (1901-09), 1858-1919) # > # ---------------------------------------------------------------------------- # > support WAGONEERS.COM:buy AMSOIL-at-: http://AMSOIL.com/redirect.cgi?zo=283461 # > # ---------------------------------------------------------------------------- # > # > On Fri, 29 Jun 2012, El PROFESOR 4X4 wrote: # > # > # # > # Hi John # > # # > # I4m about to start towing my big XJ behind my stock XJ with an AW4 auto # and # > 3.55s...should I regear? To 3.73 or 4.10? # > # # > # THX, # > # # > # Dan # > # # ------------------------------ End of fsj-digest V1 #3940 **************************