Hey everyone, well after listening to the rear end growling for the last 20k miles it's time to swap it out. The ID tag is missing off the axle, which is a Chrysler 8.25. I cant find information as to the factory gear ratio of the Chrysler rear end. Were there more than one available set of gears offered in the Chrysler 8.25 rear end? It's a 97 Cherokee, 4.0, AW4, 4WD, basic Cherokee (non sport or upcountry). Any help on this would be greatly appreciated. Thank you!

P.S. can i call jeep with the vin# and get the gear ratio that way?

 

Auto's have 3.53's stock, towing package has 3.73's
they also made the 8.25 in a limited slip

 

It's an open diff (when spinning only the RR tire spins) how can i determine if it has the tow package (previous owner kept the class 3 hitch)

 

contact chrysler with your VIN and request a build sheet for your XJ
that'll tell you everything about YOUR jeep

 

I'm pretty sure the stock gearing for the automatics is 3.55

 

haha your right, my bad, it's early

 

If you can't find the stamping on the ring gear, divide the number of teeth on the ring gear by the number on the pinion

 

My '99 4.0 auto has the towing package and it's got 3:55's.

 

Mine is a 1996 4.0 AX-15 with Dana 30 and Chrysler 8.25 ratio is 3.07:1


Its crap... I am on 29 inch tires and its soooo slow to get up to speed. Swapping up gearings asap.

 

You could check the front diff for a tag, but to be sure; raise just one rear tire off the ground and spin the driveshaft. Count how many driveshaft revolutions it takes to get 2 revolutions of the tire and that's your ratio. 3.55 being the most common, if your driveshaft makes 3.5 rotations that's what you got.

 

I have a 2000 Jeep Cherokee Xj. I'm trying to figure out what gear ratio I have so I can replace the rear. One tag says 3.5. Another tag says 1250, i think. I can't quite make it out completely. I know the last three are definitely 250 but can't make out the first number. Any suggestions anyone?

 

http://forum.northeastjeep.org/index.php?topic=1419.0

 

My '01 Auto with factory towing package also had the 3.55's

 

3.5 tag is for 3.55 gears

 

'90 Laredo with tow package, also 3.55. I've seen some 'charts' claiming that either 3.73 or 4.10 was standard with a tow package which is clearly false. Some indicate that those gears were put in some with the tow package which may be true. I've also seen claims that a tow package in early models included a dana 44 rear instead of a 35 which is also false, if it has ABS it got a 35 no matter what other options it has.