HP D30 Pattern Check

[Root Moose]

I'd set the backlash smaller - between .004 and 0.006 as was mentioned above is what you will find in the search in here.

Also, when discussing with a local gear setup guy that is highly recommended and has been doing 4x4 setups for decades that is what he suggested (the specific numbers) without prompting.

The Dana 30 housing will open up a touch under load.

 

[JJacobs]

I'd be more concerned with the pinion depth than the backlash on this one. It's too deep. Might be OK to run, but if it was mine it'd be adjusted again.

 

[IntrepidXJ]

i think i'm going to tighten up the backlash and move the pinion out a tad when i have a chance this weekend, and see what happens

 

[jeeperjohn]

i think i'm going to tighten up the backlash and move the pinion out a tad when i have a chance this weekend, and see what happens

I wouldn't tighten up the gap anymore, especially if you plan to be hard on the axle.

 

[xj92]

I try and shoot for .006 also, but the setup I did last month is at .008 and it runs quiet without any problems.

 

[IntrepidXJ]

i ended up removing .002 from under the inner pinion bearing race and got the backlash set at .005

pattern looked good (sorry, didn't have my camera with me this time) so I buttoned up and will run it

thanks for the replies.

 

[jeeperjohn]

i ended up removing .002 from under the inner pinion bearing race and got the backlash set at .005

I don't know what the factory spec is for backlash but .005" sounds too tight to me. As your diff gets warm during driving the ring and pinio expand and that gap closes up. What is the factory spec range?

 

[IntrepidXJ]

I don't know what the factory spec is for backlash but .005" sounds too tight to me. As your diff gets warm during driving the ring and pinio expand and that gap closes up. What is the factory spec range?

did you read the rest of the thread? i had it at .008 (spec is .006-.010), and a few suggested i make it a little tighter since it will open up as the gears break in

 

[xjjeeper19]

Leave it alone, and run it...it's fine.

 

[PstrKd4BrthCntrll]

when you did the wear pattern, was the rear end under load or just free spinning it??

 

[IntrepidXJ]

when you did the wear pattern, was the rear end under load or just free spinning it??

well, this is the front axle and I was putting as much drag on the gears as I could when getting the pattern