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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Are Front to Rear Differential Ratios the same ?

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Unread 09-18-2013, 09:24 PM   #31
riot1987
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1997 ZJ 
 
Join Date: Jun 2012
Location: In your attic, with the squirrels and wrapping paper
Posts: 3,568
True. But I have a Trussed 8.8 and not an aluminum 44

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Unread 09-25-2013, 05:56 PM   #32
9496ZJs
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1996 ZJ 
 
Join Date: Jun 2010
Location: Northeast US
Posts: 75
May I jump on this thread? How to buy front axle assembly?

I am shopping for a complete replacement front axle assembly on a few websites and they all seem to differentiate them by certain features. Before I make a wrong decision, I am trying to get a little data.

Most sites say something like:
1) Mfg Date ( a few date ranges in here)
2) whether UJoint Style Front Drive Shaft Yoke, or CV Style Front Drive Shaft. (most sites say U-joint style).
3) CV Style front Axle shafts, or UJoint front axle shafts
4) Gear ratio (a few 3.55 and lots of 3.73)


And here is the data on my ZJ...

1) MY '96 (mfg date on door sticker says 2-96)

2) ? I know there's a cardan joint on the end of the front shaft where it goes into the front diff. I don't know what's on the other end. Which was more prevalent for this year? Were there any Jeeps made with CV Joint?

3) Pretty sure CV Front Drive Shafts, because I remember a torn boot up against the tone ring on one of the wheels.

4) Gear ratio not visible. The tags are ripped off the differentials by an overzealous repair guy. It's a V8 engine in USA, which I think included Tow Prep, which would suggest 3.73 gear ratio, right?

And I am betting that it must be a Dana Model 30, right?

It has been WAY too long since I lived under this jeep. My dad is giving it back to me after front control arm mounting brackets shredded off. And there are apparently cracks in the shock mount perches. I don't have welding skills or patience to fight the rust. It's 40 miles away and I don't know all the details yet. This should be a fun project for me and my son.
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Unread 09-25-2013, 07:11 PM   #33
joe19934
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1998 ZJ 
 
Join Date: Aug 2013
Location: Camden, DE
Posts: 102
Quote:
Originally Posted by 9496ZJs View Post
I am shopping for a complete replacement front axle assembly on a few websites and they all seem to differentiate them by certain features. Before I make a wrong decision, I am trying to get a little data.

Most sites say something like:
1) Mfg Date ( a few date ranges in here)
2) whether UJoint Style Front Drive Shaft Yoke, or CV Style Front Drive Shaft. (most sites say U-joint style).
3) CV Style front Axle shafts, or UJoint front axle shafts
4) Gear ratio (a few 3.55 and lots of 3.73)


And here is the data on my ZJ...

1) MY '96 (mfg date on door sticker says 2-96)

2) ? I know there's a cardan joint on the end of the front shaft where it goes into the front diff. I don't know what's on the other end. Which was more prevalent for this year? Were there any Jeeps made with CV Joint?

3) Pretty sure CV Front Drive Shafts, because I remember a torn boot up against the tone ring on one of the wheels.

4) Gear ratio not visible. The tags are ripped off the differentials by an overzealous repair guy. It's a V8 engine in USA, which I think included Tow Prep, which would suggest 3.73 gear ratio, right?

And I am betting that it must be a Dana Model 30, right?

It has been WAY too long since I lived under this jeep. My dad is giving it back to me after front control arm mounting brackets shredded off. And there are apparently cracks in the shock mount perches. I don't have welding skills or patience to fight the rust. It's 40 miles away and I don't know all the details yet. This should be a fun project for me and my son.
I could be wrong but I think the front is a Dana 30 - you can find the ratio by getting the numbers off the Ring gear if you take the cover of the Front Diff and google the numbers off it. Look here as well http://www.jeep4x4center.com/jeep-ax...herokee-zj.htm

Last edited by joe19934; 09-25-2013 at 07:37 PM..
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Unread 09-25-2013, 08:18 PM   #34
9496ZJs
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1996 ZJ 
 
Join Date: Jun 2010
Location: Northeast US
Posts: 75
Thanks.

I expect I'll learn a lot more when I get it back in my own garage.

Any comments from the forum about whether there were mostly U-Joint drive shaft yokes versus CV joint drive shafts?

I found a couple of places where I might have a shot at a good unit. But I'm not sure whether to believe my own date code and just "ASSume".

Maybe we will wait until we get it back home...
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