Questions about the front differential

Fulltimer · **Posted:** Sun Apr 22, 2007 12:48 pm

What exactly breaks on them?
Is the reinforcing strap the only cure?

IF it's the housing that brakes, would extra large, as in built up, welding seams help out?

Terry

carroll952 · **Posted:** Sun Apr 22, 2007 12:58 pm

Check this out, has pics and an explenation of what broke. Aside from the reinforcing coller, I'm not sure what else can be done to it. I imagine it's basically just hard to overcome the fact that the Dana 30a is aluminum.

http://www.lostjeeps.com/forum/phpBB3/vie ... ana#114918

Justin

Fulltimer · **Posted:** Sun Apr 22, 2007 3:17 pm

Thanks for the link. Interesting. It seems like there should be something out there that would work as a substitution from a junk yard. Why they would use aluminum is beyond me. I guess, weight and $$$.

Terry

spoonplugger1 · **Posted:** Mon Apr 23, 2007 11:53 am

Al of www.jeepinbyal.com had his beefed with additional aluminum webs while he had it out, I haven't heard of him having any problems since. Check with him for info, he's running larger tires than the rest of us also.

Mutt · **Posted:** Mon Apr 23, 2007 12:01 pm

It's not so much the fact that the diff is aluminum, it's more due to poor engineering on Daimler-Chrysler's part. Mark William's and others manufacture a 9" Ford aluminum third member that is used in applications with over 1000 ft/lb of torque.

Phadeout · **Posted:** Tue Apr 24, 2007 11:14 am

Hmmm,

I noticed that the 30a uses 75w-140 and doesn't give the 75w-90 as an optional gear oil like the 8.25 does.

Could using 75w-90 help relieve some of the pressure on the diff and maybe, just maybe, help it stay together?

Jeepjeepster · **Posted:** Tue Apr 24, 2007 1:50 pm

Phadeout wrote:

Hmmm,

I noticed that the 30a uses 75w-140 and doesn't give the 75w-90 as an optional gear oil like the 8.25 does.

Could using 75w-90 help relieve some of the pressure on the diff and maybe, just maybe, help it stay together?

no, the oil wouldnt do anything.

Fulltimer · **Posted:** Tue Apr 24, 2007 5:09 pm

I sent off an e-mail to Dana for suggestions. IF they answer me I'll post it.

Terry

Questions about the front differential

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