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rbpwr
03-06-2011, 11:10 AM
what kind of tranny fluid is good by weight to run in a r34 tranny/ its time to change mine and im not sure what the guy before me was running in the car. also i have the same question regarding the rear end it has a wleded and r200 gears, thank you
smoked240
03-06-2011, 11:34 AM
Most 75w-90 gear lube will be just fine. Or even 80w-90 I believe it must have Gl-4 in it, you can read on the bottle and it should say. Most gear lube nowadays has gl4 or gl5 but some might not. Just use the same in the rear end.
240Shwag
03-06-2011, 11:37 AM
Most 80w90 gear lube will be just fine. I believe it must have Gl-4 in it, you can read on the bottle and it should say. Most gear lube nowadays has gl4 or gl5 but some might not. Just use the same in the rear end.

GL-4 and GL-5 are a set of specifications, not something they add in.
GL-4 allows the protection of brass (synchros) by not including sulfur in the mix. GL-5 does contain sulfur and would be a unwise choice for the transmission.
There is only a handful of GL-4 oils on the market. Redline MT-90 is one of them, not sure if people are still using it.

If your diff is welded, don't opt for something with a LSD additive. Its not required. You need a GL-5 oil in here. The added sulfur allows the oil to take more pressure.

So:

75-90 for the transmission in GL-4.
80-90 for the diff in GL-5.
Ali 556
03-06-2011, 11:47 AM
Redline MT90 is GL4 75-90W and good for all tran's, the diff uses GL5 based oil and you can use Redline 70-140 GL5 for the diff.

Redline and you will never look back :)
smoked240
03-06-2011, 11:55 AM
GL-4 and GL-5 are a set of specifications, not something they add in.
GL-4 allows the protection of brass (synchros) by not including sulfur in the mix. GL-5 does contain sulfur and would be a unwise choice for the transmission.
There is only a handful of GL-4 oils on the market. Redline MT-90 is one of them, not sure if people are still using it.

If your diff is welded, don't opt for something with a LSD additive. Its not required. You need a GL-5 oil in here. The added sulfur allows the oil to take more pressure.

So:

75-90 for the transmission in GL-4.
80-90 for the diff in GL-5.

Well i use just basic 80-90 and it has done me no problem for the past 5 years in both trucks, and 2 years in my car.
rbpwr
03-06-2011, 09:09 PM
thanks for the input, appreciated