Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: 2grand4u on April 15, 2009, 02:00:56 PM

Title: What grand cherokees came with 3.73
Post by: 2grand4u on April 15, 2009, 02:00:56 PM: like it says, i know there is grand cherokees with 3.73 and i need a rear so i was hopping to narrow it down a little for when i go to PNP, i'm just going to call in the VIN on the trucks.

dose PNP still have a couple GC i was there two weeks ago and they had 3 is there still a good chance they still do??

thxx to all the people that have helped me out i'm a little new at the hole jeep thing and i'm learing quick.

Ryan
Title: Re: What grand cherokees came with 3.73
Post by: XJHERO on April 15, 2009, 02:15:10 PM: just pull the cover off and see what ratio it is. or do a full turn of the pinion and count axel rotations.
1 pinion rotation =3.73 turns of the axel
Title: Re: What grand cherokees came with 3.73
Post by: 2grand4u on April 15, 2009, 02:18:09 PM: Quote from: XJHERO on April 15, 2009, 02:15:10 PM
just pull the cover off and see what ratio it is. or do a full turn of the pinion and count axel rotations.
1 pinion rotation =3.73 turns of the axel

how do you tell the difference from 3.55 to 3.73 they are really close to just eyeball it
Title: Re: What grand cherokees came with 3.73
Post by: JackstandJohnny on April 15, 2009, 03:08:07 PM: most diffs have a tag that will tell you the ring gear too. it it has a V8 and a hitch, chances are its a 3.73 as well
Title: Re: What grand cherokees came with 3.73
Post by: cLAY on April 15, 2009, 03:16:09 PM: I have three '93 V8 Grand Cherokees. All have V8s and limited package. One has no tow package and 3.55s. One has tow package and 3.73s. One had tow package and the upcountry suspension and 3.73s. So one with a V8 and tow package would be a good bet but try to confirm by finding a tag under one of the diff cover bolts. Check the front diff if the rear diff is missing the tag.

Here is the really goofy part. Two of them have the CV axles in the front diff. One has u-joint axles. Guess which one. Nope not the Upcountry. Its the non-tow package 3.55 gears unit. ???
Title: Re: What grand cherokees came with 3.73
Post by: BlackYJ on April 15, 2009, 03:32:18 PM: Quote from: XJHERO on April 15, 2009, 02:15:10 PM
just pull the cover off and see what ratio it is. or do a full turn of the pinion and count axel rotations.
1 pinion rotation =3.73 turns of the axel

This is backwards, 1 turn of the axle = 3.73 turns of the pinion
Title: Re: What grand cherokees came with 3.73
Post by: XJHERO on April 15, 2009, 03:34:23 PM: YA thats why i try not post tech stuff im usualy wrong ;D
thanx scott
Title: Re: What grand cherokees came with 3.73
Post by: JackstandJohnny on April 15, 2009, 03:53:06 PM: hey clay, you have a V8 grand that came with ujoint axles? i thought the u joint axles only came with the 6cyl/NP242 transfer case?

side note. can u pm some of that info on ur non' running ZJs? and maybe why they are not runnin?
Title: Re: What grand cherokees came with 3.73
Post by: cLAY on April 15, 2009, 04:43:01 PM: Nope I have a V8 with the NP249 and u-joints.
Title: Re: What grand cherokees came with 3.73
Post by: dunl on April 15, 2009, 04:49:39 PM: Quote from: JOhnnyC on April 15, 2009, 03:53:06 PM
side note. can u pm some of that info on ur non' running ZJs? and maybe why they are not runnin?

I'd be surprised if Clay has a ZJ that ISN'T running. lol
Title: Re: What grand cherokees came with 3.73
Post by: cLAY on April 15, 2009, 09:03:32 PM: I currently own 3 ZJs. One is the trail rig(its running). The other was my daily driver but the fuel pump went so I started to part it out. Then I bought a '95 to replace it and that turned out to have a bad head gasket and front diff so its parked as well. Technically they all run..... I'm just not driving them. :P