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[ScruffyDoug]

Hi guys, can anyone help me identify exactly what rear axle and gear ratio I currently have on my 96 4.0 ZJ?

I've read pretty much every forum post on every forum I can find,  and to be honest I think I've read so many different things I'm just confusing myself even further.
I think it's a D35c, and judging by the other codes, it's a 4.198 gear ratio (seems very high, I'd assumed it'd be a 3.73 or 3.55?). Also 2 other codes, which I'm clueless about.

[bigjeepzj]

It's a 35. The ratio is on a tag that has usually go missing on Thu age of jeep the only way to tell the ratio is to count the teeth of the ring and pinion.

[ScruffyDoug]

Thanks, yeah could see vague evidence of where the tag had once been but the tag itself is long gone.

Cheers for confirming!

[Jonny Jeep]

If it's unmodified you could contact Jeep from the US website and ask for a build sheet which they will email to you. It will tell you what was fitted at the factory. You'll need a US address for the enquiry but you can use any address you want.

[Brynjaminjones]

I've done this with all three Jeeps in the family now and they've emailed me the build sheet in a couple of days.

Our '97 4.0 ZJ has a Dana 35C rear axle with the Trac-Lok LSD and a 3.73 ratio. I would assume that all UK ZJs are the same, but Dave (bigjeepzj) will probably correct me on that!

I believe that this is the form you need to fill out:
http://www.jeep.com/webselfservice/jeep/EmailPage.html
I always selected the "Customer Assistance" box which worked every time. I also just filled out my address as best I could then put a US ZIP code.

[Mike Pavelin]

It should be a D35c with Trac-Loc. 3.73 diesel or 3.55 petrol if I recall.

[ScruffyDoug]

Would the back axle from a 4.0 99-04 WJ be a match do any of you know?

[donk498]

Would the back axle from a 4.0 99-04 WJ be a match do any of you know?

No wj is different. D44 with alloy center.

[carljh]

much easier way to try first is this,
http://www.jeep.com/webselfservice/jeep/index.html?screenName=customer&country=us&emailUrl=goToEmailForm%2528%2527R%2527%2529
on the left in the "Your Vehicle" box, click equipment listing and type in your VIN number, If your lucky it will open a new tab with your build sheet, if not you will have to do it like Brynjaminjones said.

[ScruffyDoug]

Cheers guys, I'll try the VIN number link in the morning and see how it goes, if not I'll try the email approach.

[johnnyboy]

Just tried the on-line lookup bit, and it says it only goes back to 1998.


So I have sent them an email...