Hi, this is my first post on the BITOG forum. Such a pleasure to find auto enthusiasts !
I wish to rebuild a differential for a BMW E46 M3, and coat lightly gears and bearings with a dry lubricant (W2S or Boron nitride). The coat is sub-micron. But this could raise some issues that maybe you are aware :
-Since dry lubricants are extremely slippy, could it contaminate clutch disks and change the behavior of the locking function ? The differential is M-variable.
-When rebuilding, preload is the key. But, if the internals are very slippery the preload reading could be impaired. And when the dry lubricant will fade bearings will have a hard time ? Or is the preload not related....
The purpose of this is to maximize the life of the diff which is very expensive normally to change by your dealer. It is a total ripoff and the non serviceable philosophy rebuts me. There are alternatives for this matter (better internals Quaife/OS) but since it is my first ever rebuild I wish to keep the stock internals. I will also change oil more regularly so maybe contamination could be a non issue plus there is the "GM friction modifier", as last resort.
Thanks
I wish to rebuild a differential for a BMW E46 M3, and coat lightly gears and bearings with a dry lubricant (W2S or Boron nitride). The coat is sub-micron. But this could raise some issues that maybe you are aware :
-Since dry lubricants are extremely slippy, could it contaminate clutch disks and change the behavior of the locking function ? The differential is M-variable.
-When rebuilding, preload is the key. But, if the internals are very slippery the preload reading could be impaired. And when the dry lubricant will fade bearings will have a hard time ? Or is the preload not related....
The purpose of this is to maximize the life of the diff which is very expensive normally to change by your dealer. It is a total ripoff and the non serviceable philosophy rebuts me. There are alternatives for this matter (better internals Quaife/OS) but since it is my first ever rebuild I wish to keep the stock internals. I will also change oil more regularly so maybe contamination could be a non issue plus there is the "GM friction modifier", as last resort.
Thanks