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-   -   When did JK get upgraded rear axle (http://www.jeepforum.com/forum/f96/when-did-jk-get-upgraded-rear-axle-1021105/)

keithert 04-27-2010 10:00 AM

When did JK get upgraded rear axle
 
I think that in 2008 the JK got the upgraded rear axle on all models. Why was this? Were they having problems with the axles in the 07s? Should I stay away from an 07 with the standard axle?

Seanie 04-27-2010 10:05 AM

The early 07's came with the Dana 30 or 35, can't remember which off of the top of my head. They're very rare though. The good thing about the 07's is that if it's an Auto with a dana 44, it's got 4.10's. :)

N2rock 04-27-2010 10:15 AM

Quote:

Originally Posted by keithert (Post 9361215)
I think that in 2008 the JK got the upgraded rear axle on all models. Why was this? Were they having problems with the axles in the 07s? Should I stay away from an 07 with the standard axle?

rear axle is the same. As mentioned, the early '07 models had a D35 rear. But that was short lived- only some of the ones with a build date in '06 have them. IIRC December '06 builds is when they switched to D44 for all models.

keithert 04-27-2010 10:19 AM

Thanks for the info. Was the D35 rear bad news?

N2rock 04-27-2010 10:28 AM

Quote:

Originally Posted by keithert (Post 9361350)
Thanks for the info. Was the D35 rear bad news?

Yes- if you wheeled it, you were probably going to grenade it. It didn't take long for Jeep to realize it was a big mistake.

ronjenx 04-27-2010 10:49 AM

Quote:

Originally Posted by Nellanaesp (Post 9361253)
The early 07's came with the Dana 30 or 35, can't remember which off of the top of my head. They're very rare though. The good thing about the 07's is that if it's an Auto with a dana 44, it's got 4.10's. :)

A friend of mine has an '07, 6 speed, 4.10 gears. He bought it off the lot, not special ordered.

N2rock 04-27-2010 11:05 AM

Quote:

Originally Posted by ronjenx (Post 9361515)
A friend of mine has an '07, 6 speed, 4.10 gears. He bought it off the lot, not special ordered.

Tow package

limeking 04-27-2010 11:09 AM

Quote:

Originally Posted by N2rock (Post 9361416)
Yes- if you wheeled it, you were probably going to grenade it. It didn't take long for Jeep to realize it was a big mistake.

Not so true. They used that crappy 35 since 1987.

juiceparn 04-27-2010 11:15 AM

Sure they used to get away with it but the 35 just wouldn't stand up to the increased HP and torque of the 3.8:rofl::rofl::rofl: I had to!

N2rock 04-27-2010 11:25 AM

Quote:

Originally Posted by limeking (Post 9361633)
Not so true. They used that crappy 35 since 1987.

Yeah- that was one of the mistakes they learned from the TJ

I would like to thank the TJ's for being the guinea pig, so that they could then build the JK perfect! :laugh:

ronjenx 04-27-2010 11:26 AM

Quote:

Originally Posted by N2rock (Post 9361606)
Tow package

Nope. It didn't have it when he bought it. Tow package not on his build sheet, either.

jake_blue 04-27-2010 11:29 AM

So then maybe this is a dumb question but chalk it up to being a Jeep newbie... why is the D35 unsuitable for the rear axle but still suitable for the front axle? You have to get the Rubicon to get a D44 front axle. Unless it just has to do with the duty rating and that the rear axle is always engaged versus the front axle only part-time.

juiceparn 04-27-2010 11:31 AM

They don't use it in the front either. The front is a Dana 30 on all JK's except Rubis.

N2rock 04-27-2010 11:38 AM

Quote:

Originally Posted by ronjenx (Post 9361743)
Nope. It didn't have it when he bought it. Tow package not on his build sheet, either.

Rubi, Auto, Tow package- those were the standard 4.10's in '07

Sounds like your friend found an oddball.

ronjenx 04-27-2010 11:39 AM

Quote:

Originally Posted by N2rock (Post 9361822)
Rubi, Auto, Tow package- those were the standard 4.10's in '07

Sounds like your friend found an oddball.

He appreciates his good luck. He bought it after the Lifetime Warranty started, too


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