Red Line Gear Oil

[anxious]

Red Line Gear Oil

AS you guys have read B4.....I suspect that my knocking sound may be from my differential.

I read that Redline 75W90 gear oil is recommended for BMWs.

http://www.bimmerworld.com/html/red...90-gear-oil.htm

However I also read

80W140 Gear Oil - For heavily-loaded and low-speed differentials, including limited-slip, and where reduction of limited-slip chatter or gear noise is required.

Has anyone tried either 75W90 or 80W140 Gear Oil?

Thanks

 

[Big Daddy]

I have Redline in a my BMW's, however I am not sure which gear oil they used. I left it to my mechanic when he converted the cars years ago. Either way I have had no problems and no noises. (the cars are: 91 318is, 91 750iL, & M roadster)

 

[vlad]

I highly recommend Red Line products! Some of the best lubricants available. I'm currently using the 75w90 in the limited slip diff in my 325es. No complaints and I really think that it's the best lubricant to use in an out of warranty BMW. The MTL for manual trannys is just plain awesome!

If your car is still in warranty, use whatever BMW specs for your car. Otherwise, if anything goes wrong with the diff, your dealer may try to blame the oil.

 

[pauld]

Anyone ever use Lucas?? I put that in the rear but it says for all
"hypoid" gear app's but also says for any gear box. My manual says
use "non-hypoid" for the gear box. I have not found oil that says
it's for "non-hypoid" gears. Thanks

 

[86_325es]

I put some lucas in with reg gear oil in the manual tranny in my bronco 2 and the mainshaft bearing went out a month later... was so loose it wouldnt touch rewind..... but the way i drove that truck I really can't contribute the failure to the lucas oil.... 70 mph in 2nd gear with 3.45's couldnt have helped....i did notice that the synchros werent working as well till the truck warmed up after i added the lucas... anyway my 2 cents..

 

[drifty30]

i just use the 75w90 in mine.... have had no problems..... redline 75w90 has friction modifiers in it also that promote lockup.... i wouldn't recommend anything else.

 

[anxious]

Sorry guys I was thinking of the diff as an alternative to 75w90 gear oil for the differential.

Redlines website says:-

80W140

Generally used in commercial trucks which will climb long, steep grades and some racing applications where power is not critical. Generally 0.5% less efficient than 75W90. Can also be used in differentials and transmissions where excessive noise is a problem and limited-slip differentials which vibrate excessively when turning a corner. Exceeds API GL-5.

I was wondering whether it would quieten my diff backlash?