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View Full Version : Diff & Transmition oil change


svtvnm
01-03-2009, 07:43 AM
Just wanted to ask peoples opinion on what is the recommended or best oils to use when changing oil in Diff & Trans, I have a noisy Trans actually hopefully a Trans change might quieten it down a little.

Lumpydogs
01-03-2009, 11:30 AM
I have been using Mobil 1 for both applications.

I use Mobil 1 75W-90 synthetic gear lube w/ Ford's friction modifier (from dealership) in the diff.

I use Mobil 1 Mercon ATF in my manual transmission.

I have heard good things about the GM syncromesh (sp?) tranny fluid.

cobrapace94
01-03-2009, 10:08 PM
Royal Purple here with no issues. Smoothed the shifting on both, 94 & 01.

svtvnm
01-04-2009, 01:22 AM
While I am on the topic of oil change all the literature I read mentions refill capacity for the Engine as 5.7lt. My mechanic uses about 7lt with a filter change does this sound right??

Lumpydogs
01-04-2009, 12:15 PM
While I am on the topic of oil change all the literature I read mentions refill capacity for the Engine as 5.7lt. My mechanic uses about 7lt with a filter change does this sound right??

Yes, the manual calls out 6 quarts (5.7 L). I used to run 7 quarts (6.62 L) at the track trying to fight off oil starvation. 7 Liters seems to be a bit of overkill for daily driving of a stock configured cobra. I don't think 7 Liters would do any damage though.

I'm assuming you buy oil by the liter down there. If so, why not run 6 liters?

Just my two cents.

brkntrxn
01-04-2009, 02:22 PM
I also run 7 quarts of Mobile 1 in a stock oil pan on our 01. Oil pan capacity tests have shown that 7 quarts is not too much.

For diff fluid, I run Redline Shockproof 75/90.

For tranny, I use GM Syncromesh non-synthetic.

kng9nothing
01-22-2009, 04:10 PM
This weekend, I'm putting on the MGW shifter and I'm going to go ahead and change the trans fluid. Does anyone know off the top of their head how much it should hold? I think I'm going to go with Royal Purple.

svtvnm
01-26-2009, 09:58 PM
I beleive it is 3.1lt