tdcalhoun89

I just changed the ATF and filter in my '98 Jeep Grand Cherokee and it made a HUGE difference. I found some information regarding transmission fluid changes in Mustangs, but I still didn't find exactly what I wanted...
-How often do you guys change the transmission fluid in your Mustangs?
-How much transmission fluid takes for a refill?
-What type of transmission fluid do you guys use?

Transmission is Tremec TR-3650.

Thanks.

cliffyk

Here are my recommendations:

• 50 to 60k miles;
• 3.0 liters (3.2 quarts) per this TSB;
• Mobil 1 ATF;

bopiela

I've been thinking about doing this too while I'm working on my car. May wait on this one though...

tdcalhoun89

Cliffy, as always, you're the man.

The link is exactly what I've been looking for. I've been hearing the "clash" noise for about a year now (~5000 miles). I wasn't sure what it was, but your information confirms what I thought it might could be.

Thanks for the information/link. I will be changing my transmission fluid over spring break.

TRUEBLUE3934

CLIFFY has the answer to the OP question.
I know a very reliable guy on another forum who has tried just about every fluid and "magic" potion in his 3650, and he swears that Amsoil fluid was definitely the best.

Mobil1 is the Ford recommendation, and 102oz is the proper revised fluid level. I have found the easiest way to add precisely 102oz is to remove the shifter on top of the trans, measure and pour the fluid in that way.

tdcalhoun89

Good advice ITT.

Thanks TRUEBLUE.

cliffyk

I just squirt 3 quarts in through the fill hole, with a 4 ft length of 3/8" ID vinyl tubing and one of these--replace the supplied short tube with the longer one, run it down through the passenger side and stick into the filler hole--screw the adapter to the oil bottle, stand by the passenger side fender and squeeze, When bottle #1 is empty move on to bottle #2--repeat...

A lot easier for me (and I'm a geezer) than pulling the shifter.

BTW 102 ounces = 3.18 quarts = 3.016 liters, and it really isn't that critical. The "real" spec is 3.0 liters, which I am sure was selected as it was an integer number of liters--not because it was a "magic number" that promoted smooth shifting, transmission happiness and eternal life.

It was converted to English measurement for the TSB as 6.3 (actually 6.34) pints, and then in common parlance to 3.2 quarts which is 3.028 liters.

So, I just dump in 3 quarts and be done with it...

tdcalhoun89

Thanks Cliff. I figured out this trick when I was changing the gear oil in my Jeep's front and rear axles. Thanks for the conversions too.

TRUEBLUE3934

CLIFFY,
I have used that method as well, but it only takes me a couple minutes to take the shifter off (I use the rubber gaskets so no sealer issues). Either way is good, but you may have a better method for guys with stock shifters. Well done!

cliffyk

I have a Cobra Bob gasket in there, but pulling the shift bezel the the shifter is a lot more hassle for me than just squirting it in from up top...