Transmission lube

[Peter Coomaraswamy]

This has probably been discussed before but in both the getrag 265 and the rear diff I am running the "high-tech" red lube and my trans shifts really well, no issues but it's a little "noisy", kind of a shhhhh sound. If I were to change it with regular 90 wt.? oil do you think it would help or harm? I'm thinking it may quiet it down and since I'm not racing it probably would not effect the life but i don't know.

Thanks

 

[Tierfreund]

I´ve run all sorts of stuff in the 265 looking for quiet and good shifting.
90wt doesn´t really make it quieter. What does help is sound deadening on the transmission tunnel and isolating the shifter + makeing the shifter hole more acoustically tight. I´ve put in a rubber cover from an E24 under the shifter console and have the spongy thingy from beneath. Also proper rear support in rubber (E24 parts) for the shifter arm.

90wt doesn´t hurt as long as it´s GL4 (never put GL5 in a manual box, that WILL hurt), but it won´t make it (much) quieter.

Compared to the "high tech red lube" though it will make it much less of a slick shift, especially when cold.

I went to Redline MTL after lots of experiments (about 5 different oils in the 265 to get good shift and quiet) and will never go to anything else again.
Normally I´m not that easy to convince, especially with oils, but that stuff is really great.

In fact if I were to but a brand new M3/M4 with a stick today my first call would be to redline to ask if I can put their stuff in there...

 

[Stevehose]

+1 on Redline MTL

Check the fluid level to see if you are a little low - that can cause some noise also.

 

[Peter Coomaraswamy]

OK, I leave it as is Thanks!