What Tranny fluid to use with a T-45??

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01-01-2006, 06:09 PM

Dsmfighter

3rd Gear Member

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Join Date: Jan 2005

Location: Canton Ohio

Posts: 731

What Tranny fluid to use with a T-45??

What tranny fluid do you guys reccomend running? Redline, Royal Purple, ect? Thanks.

01-01-2006, 06:29 PM

SilverGTV8

4th Gear Member

Join Date: Aug 2003

Location: United States

Posts: 1,974

RE: What Tranny fluid to use with a T-45??

Royal purple is much better then the Redline. I believe you run the Syncromesh in the T-45 and the ATF if the 3650.

01-01-2006, 06:39 PM

Aixtreme89

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Join Date: Feb 2005

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Posts: 2,034

RE: What Tranny fluid to use with a T-45??

Check your owners manual and see what oil you should use, weight and viscosity..... I think that transmission used gear oil not automatic transmission fluid. My old T-5 in my old 89 mustang used gear oil.... As for my current mustang. I have a tremec 3650 and I have to use Automatic transmission fluid for some odd reason. But I checked my owners manual and I am glad I did because I would have but regular gear oil in.... But anyways. I used Royal Purple "Synchromax" which is designed to be used in manual transmissions that reguire automatic transmission fluid. DO NOT use this fluid unless your manual states for you to use automatice transmission fluid. Automatic fluid is very thin and will most likely wear out your trans very prematurly. So if it doesnt use auto fluid. Just find out what the specs are for the oil to use and buy some royal purple gear oil. My transmission used 3.25 quarts. But yours may be different, check your owners manual it will tell you.