Choosing the proper gear ratio. - Page 2 - Jeep Cherokee Forum

Go Back  Jeep Cherokee Forum > Technical Discussion > Modified XJ Cherokee Tech
Choosing the proper gear ratio. >

Choosing the proper gear ratio.

Modified XJ Cherokee Tech XJ (84-01)
All modified tech questions. If it modifies your XJ beyond stock parts ask it here.

Choosing the proper gear ratio.

Reply

 
 
 
Old 01-29-2017, 11:31 AM
  #16  
Senior Member
 
cbs_24's Avatar
 
Join Date: Jun 2014
Location: Eagle River, Alaska
Posts: 901
Year: 1997
Model: Cherokee
Engine: 4.0 I6, Brown Dog motor mounts, AEM intake, 62mm TB, APN Header, 703 injectors
Default

Did 4.10 ever come from factory 97-01 in HPD30 and 8.25s? Found a guy selling a the pair. He doesn't know if it's 27 or 29 spline 8.25 though. Currently have the same setup w/ 3.55.
cbs_24 is offline  
Reply With Quote
Old 01-29-2017, 04:35 PM
  #17  
CF Admin
Thread Starter
 
Outlaw Star's Avatar
 
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 33,209
Year: 1987
Engine: 2.9L Stroker
Default

Originally Posted by cbs_24 View Post
Did 4.10 ever come from factory 97-01 in HPD30 and 8.25s? Found a guy selling a the pair. He doesn't know if it's 27 or 29 spline 8.25 though. Currently have the same setup w/ 3.55.
4.10 was the standard gear ratio for the 2.5L models. 4.0Ls mainly came with 3.55 (Auto) and 3.07 (Std)
Outlaw Star is offline  
Reply With Quote
Old 01-29-2017, 05:05 PM
  #18  
Senior Member
 
TRCM's Avatar
 
Join Date: Jan 2016
Location: Newport News, VA
Posts: 798
Year: 96 & 88 4 dr Cherokees
Default

Originally Posted by jedijeb View Post
My 85xj with 4cyl and 3speed auto came with 3.73 gears. The 4.56 was with the tow package and 4cly I believe. Those are not so easy to find.
Some rarities do exist......I looked at a late 80's 2 door, 4 cyl, 4x4 that had the AW4 trans, and 4.56 gears in it....all factory.

I needed the trans, and wanted the axles....but the trans had some issues I couldn't verify, so I passed.



And as far as the speedo being corrected by a combo of gearing & tires......my 96 has had nothing done to it as far as the speedo gear, but with 31" tires, it now reads off by 2 mph @ 60 by GPS.

The factory speedo was off by a good bit, which explains why I thought I had such good gas mileage.

Last edited by TRCM; 01-29-2017 at 06:20 PM.
TRCM is offline  
Reply With Quote
Old 02-02-2017, 01:17 PM
  #19  
Seasoned Member
 
Coraphix's Avatar
 
Join Date: Mar 2011
Location: Durango, CO
Posts: 437
Year: 1987
Model: Cherokee
Engine: rebuilt straight 6
Default

Originally Posted by Fred/N0AZZ View Post

For those requiring very low gearing a doubler is used or another transfer case (3 shifters on the floor).
How hard is this to set up? Do you just run the output of your first tcase into the second and run driveshafts from there?
Coraphix is offline  
Reply With Quote
Old 02-02-2017, 08:58 PM
  #20  
Newbie
 
Join Date: Feb 2017
Posts: 2
Model: Cherokee
Default

Originally Posted by cbs_24 View Post
Did 4.10 ever come from factory 97-01 in HPD30 and 8.25s? Found a guy selling a the pair. He doesn't know if it's 27 or 29 spline 8.25 though. Currently have the same setup w/ 3.55.
8.25 29 spline came out in late 96 and up and early 96 and before were 27 splines both strong axles
white 96 jeepxj is offline  
Reply With Quote
Old 02-02-2017, 09:00 PM
  #21  
Newbie
 
Join Date: Feb 2017
Posts: 2
Model: Cherokee
Default prices

Okay so I was just looking at doing this today what's a good brand for a good price and how much do shop charge to do it I'm scaredoing to mess up and waste alot of money
white 96 jeepxj is offline  
Reply With Quote
Old 02-03-2017, 07:12 AM
  #22  
Senior Member
 
cbs_24's Avatar
 
Join Date: Jun 2014
Location: Eagle River, Alaska
Posts: 901
Year: 1997
Model: Cherokee
Engine: 4.0 I6, Brown Dog motor mounts, AEM intake, 62mm TB, APN Header, 703 injectors
Default

Expect to pay at least $250 per axle to get the gears installed. Gears are around $500 with install kits, etc.
cbs_24 is offline  
Reply With Quote
Old 02-03-2017, 07:36 AM
  #23  
Seasoned Member
 
RacerX's Avatar
 
Join Date: Nov 2011
Location: Snohomish County, WA
Posts: 290
Year: 1989
Model: Cherokee
Engine: 4.0L
Default

Originally Posted by cbs_24 View Post
Expect to pay at least $250 per axle to get the gears installed. Gears are around $500 with install kits, etc.
^ is that for new ring and pinion gears OR If I show up with junkyard pinion and ring gear carrier assembly?


Also related:
I been looking into the Volvo rearend Dana 30 locker/ ltd slip / gears & carrier option
Do any of you know anything about that?
I believe they made an e-locker (or e-traction control?) differential - I saw one. see pic
Attached Thumbnails Choosing the proper gear ratio.-volvo-axel-dscn0110a.jpg  

Last edited by RacerX; 02-03-2017 at 07:41 AM. Reason: pics
RacerX is offline  
Reply With Quote
Old 02-03-2017, 10:38 AM
  #24  
CF Veteran
 
Fred/N0AZZ's Avatar
 
Join Date: Jul 2013
Location: Monett, MO.
Posts: 7,554
Year: 1999
Model: Cherokee
Engine: 4.0
Default

Here in SW, MO. I paid $200 each to install gears and lockers that I supplied at the time Rustys had the best price on Motive gears (same as I used in my race cars for years high HP w/transbrake) for under $500 including master install kits very good ones and all of them are not equal. They also installed an SYE for $250 99XJ D30 Chy 8.25 29 spline.


All work was done at a Jeep 4x4 Shop and old one.
Fred/N0AZZ is offline  
Reply With Quote
Old 02-04-2017, 01:20 AM
  #25  
Senior Member
 
cbs_24's Avatar
 
Join Date: Jun 2014
Location: Eagle River, Alaska
Posts: 901
Year: 1997
Model: Cherokee
Engine: 4.0 I6, Brown Dog motor mounts, AEM intake, 62mm TB, APN Header, 703 injectors
Default

Originally Posted by Fred/N0AZZ View Post
Here in SW, MO. I paid $200 each to install gears and lockers that I supplied at the time Rustys had the best price on Motive gears (same as I used in my race cars for years high HP w/transbrake) for under $500 including master install kits very good ones and all of them are not equal. They also installed an SYE for $250 99XJ D30 Chy 8.25 29 spline.


All work was done at a Jeep 4x4 Shop and old one.
That's a good price! I've priced a couple different shops and $250 was the cheapest around here. $300 per was more common when I was calling around.

Last edited by cbs_24; 02-04-2017 at 01:24 AM.
cbs_24 is offline  
Reply With Quote
Old 02-04-2017, 11:37 AM
  #26  
CF Veteran
 
Fred/N0AZZ's Avatar
 
Join Date: Jul 2013
Location: Monett, MO.
Posts: 7,554
Year: 1999
Model: Cherokee
Engine: 4.0
Default

Originally Posted by cbs_24 View Post
That's a good price! I've priced a couple different shops and $250 was the cheapest around here. $300 per was more common when I was calling around.

Labor rates in my area are very reasonable for many things, even dealerships Hr. rates are lower than in larger cities in the state. I had to have some AC work done in Key West several yrs. ago on my Motor Home I found out about FL. labor rates then.


For your area that isn't a bad price either for $250 in 2017.
Fred/N0AZZ is offline  
Reply With Quote
Old 02-04-2017, 11:59 AM
  #27  
Senior Member
 
cbs_24's Avatar
 
Join Date: Jun 2014
Location: Eagle River, Alaska
Posts: 901
Year: 1997
Model: Cherokee
Engine: 4.0 I6, Brown Dog motor mounts, AEM intake, 62mm TB, APN Header, 703 injectors
Default

Originally Posted by Fred/N0AZZ View Post
Labor rates in my area are very reasonable for many things, even dealerships Hr. rates are lower than in larger cities in the state. I had to have some AC work done in Key West several yrs. ago on my Motor Home I found out about FL. labor rates then.


For your area that isn't a bad price either for $250 in 2017.
Agreed on the price being pretty good! The $250 is an indy shop local Jeep mechanic w/ a lift and garage in his backyard kind of out in the boonies a bit, so he has to charge a little less than the bigger shops to get people to drive out to him.
cbs_24 is offline  
Reply With Quote
Old 02-13-2017, 10:54 PM
  #28  
CF Veteran
 
TFitzPat87's Avatar
 
Join Date: Apr 2014
Location: Detroit, MI
Posts: 1,414
Year: 1997
Model: Cherokee
Engine: I6 4.0L
Default

So I'm just curious... most everyone recommends going with 4.56's and 33's, even for lots of DD and Highway use. Based on the math, that's a little bit of over gearing. So just curious why people don't recommend 4.10's for 33's instead.
TFitzPat87 is offline  
Reply With Quote
Old 02-14-2017, 06:56 AM
  #29  
CF Admin
Thread Starter
 
Outlaw Star's Avatar
 
Join Date: Sep 2010
Location: Lantana, Fl
Posts: 33,209
Year: 1987
Engine: 2.9L Stroker
Default

Originally Posted by TFitzPat87 View Post
So I'm just curious... most everyone recommends going with 4.56's and 33's, even for lots of DD and Highway use. Based on the math, that's a little bit of over gearing. So just curious why people don't recommend 4.10's for 33's instead.
Majority of folks go with the lower set for a few reasons. Mainly because by that lift height and tire size, you've added heavy bumpers and accessories making the rig heavier. So the added "umph" helps push your rig along easier.
Outlaw Star is offline  
Reply With Quote
Old 02-14-2017, 07:18 AM
  #30  
CF Veteran
 
TFitzPat87's Avatar
 
Join Date: Apr 2014
Location: Detroit, MI
Posts: 1,414
Year: 1997
Model: Cherokee
Engine: I6 4.0L
Default

Originally Posted by Outlaw Star View Post
Majority of folks go with the lower set for a few reasons. Mainly because by that lift height and tire size, you've added heavy bumpers and accessories making the rig heavier. So the added "umph" helps push your rig along easier.
Definitely makes sense. Plus it's not like our XJ's are all that aerodynamic.

I already decided on 4.56's for my 33's a while back, but I'm thinking possible 35's. I think that's still a good middle ground for both sizes considering my XJ see's plenty of highway miles. Plus if I decide against 35's, I'll have that nice "umph" on the 33's.
TFitzPat87 is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: