Pinion preload - too high?
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Mountain Pass
Joined: Dec 2020
Posts: 170
Likes: 45
Pinion preload - too high?
Installed new bearings into a Dana 60 LSD and get a little whine, primarily on coast.
Opened it back up to look around and find backlash and gear pattern look perfect.
But the pinion preload, after driving 4000 miles, is at 21 in lbs. (With the brand new bearings, it started out at 28 in lbs.)
Is this considered too high at this point? What should I set it to while I have the opportunity to change it? Or, should I wait and see if things change once the bearings run in longer?
Opened it back up to look around and find backlash and gear pattern look perfect.
But the pinion preload, after driving 4000 miles, is at 21 in lbs. (With the brand new bearings, it started out at 28 in lbs.)
Is this considered too high at this point? What should I set it to while I have the opportunity to change it? Or, should I wait and see if things change once the bearings run in longer?
Fleet Mechanic
Joined: Dec 2003
Posts: 1,436
Likes: 117
From: Virginia
You replaced the bearings, but reused the ring & pinion?
If that is correct, I believe it would have been best to measure the preload, backlash, etc.. prior to disassembly.
I am not a differential expert, but there would have already been a “wear pattern” in the ring & pinion that the parts are “used to”.
Changing those values would likely result in noises.
i hope you find the source.
If that is correct, I believe it would have been best to measure the preload, backlash, etc.. prior to disassembly.
I am not a differential expert, but there would have already been a “wear pattern” in the ring & pinion that the parts are “used to”.
Changing those values would likely result in noises.
i hope you find the source.
More Turbo
Joined: Jun 2024
Posts: 629
Likes: 189
From: Southeastern US
I agree with @G2IC_Wraith
If using the old gears, they should be set back to the original postion so "worn-in" parts are re-meshed as before. Otherwise, you will have noise and accelerated wear until the parts "mate" back together.
If using the old gears, they should be set back to the original postion so "worn-in" parts are re-meshed as before. Otherwise, you will have noise and accelerated wear until the parts "mate" back together.
Thread Starter
|
Mountain Pass
Joined: Dec 2020
Posts: 170
Likes: 45
You replaced the bearings, but reused the ring & pinion?
If that is correct, I believe it would have been best to measure the preload, backlash, etc.. prior to disassembly.
I am not a differential expert, but there would have already been a “wear pattern” in the ring & pinion that the parts are “used to”.
Changing those values would likely result in noises.
i hope you find the source.
If that is correct, I believe it would have been best to measure the preload, backlash, etc.. prior to disassembly.
I am not a differential expert, but there would have already been a “wear pattern” in the ring & pinion that the parts are “used to”.
Changing those values would likely result in noises.
i hope you find the source.
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