Gear whine on slowdown

[d10shun]

I just installed 4:56 gears in my d30 and and d35 on my 95. Yukon gears, Timken bearings. Driving home after the install, coasting from 30 to zero I hear a very noticable wind down whine. There is not other noise besides that.

Is this too loose or too tight backlash? We set up the rear so many times, I do not remember the backlash setting we got on the final set up, maybe 12 thousandths. I know the pattern wasn't that great but we got fed up

And I think there is a teeny tiny itty bitty issue about not putting a crush washer in.

IMPORTANT QUESTION BELOW- PLEASE ANSWER!

CAN I LIVE WITH THIS NOISE? WILL MY REAR EXPLODE? GEAR LIFE?



I REALLY do not want to take this apart for the 90th time.
Ben

 

[DrMoab]

Just talked to my father, who taught drivetrain at a trade school for 30 years. He said that if you didn't hear the noise under acceleration you are problebly ok. Also he said that 12 thousands is a little high and if your pinion depth was off..which it sounds like it was if you didn't have a good gear pattern then you WILL get noise. Loose is better then tight though so you are problebly ok for awhile.

 

[d10shun]

How will this affect gear life? Does this just mean the pinion is contacting the ring in a loose manner? Our coast pattern was good but I am afraid to talk about the drive pattern. - 24 hour install - No sleep makes you do crappy work.

 

[Eagle]

The drive pattern is more important than the coast pattern. You can run it like that, but gear life will be shortened. By how much? I don't have a clue. Search for RawBrown and drop him a PM, he'll set you straight.

 

[jeepguy97]

You didn't install the crush sleeve??!!!! If I am understanding this correctly you didn't install the crush sleeve and that will throw it all off.

 

[RCP Phx]

You didn't install the crush sleeve??!!!! If I am understanding this correctly you didn't install the crush sleeve and that will throw it all off.

Ditto,that wont work!Thats the same noise youll get without enough pinion beraring pre-load!Take back apart and do it right,gears are nothing to just "slap" together!

 

[BillR]

If your axle is stock, ('95) it doesn't use a crush sleeve. A HP30 uses shims for preload, and a LP uses a crush sleeve.

 

[Eagle]

If your axle is stock, ('95) it doesn't use a crush sleeve. A HP30 uses shims for preload, and a LP uses a crush sleeve.

But the Dana 35 in the rear still uses a crush sleeve, doesn't it? I missed that part of the original post ... yeah, if it's running with no preload it won't last long.

 

[BillR]

OK...
I saw the "30 to 0" and I thought he was talking about the Dana 30.
My bad! :dunce:

 

[DrMoab]

But the Dana 35 in the rear still uses a crush sleeve, doesn't it? I missed that part of the original post ... yeah, if it's running with no preload it won't last long.

Yup we did my buddies 97 with a Dana35 Crush sleave is there baby. And ummm...yeah...needs to be there and tightend Right or no workie righty