Which weight trans oil?

Reply Subscribe

Thread Tools

Search this Thread

03-18-2013, 06:56 AM

Justinsmt88

2nd Gear Member

Thread Starter

Join Date: May 2012

Location: Ohio

Posts: 315

Which weight trans oil?

I'm going to be swapping out my stock fluid in my new TR-3650 for AMSOIL but I noticed there are two different weights. There's the 75w-90 and the 5w-30 synchromesh. Which one would be best for the TR-3650?

03-18-2013, 05:40 PM

JCON

5th Gear Member

Join Date: Jul 2009

Location: Delaware

Posts: 2,215

I just ordered Royal Purple Synchromax.

03-18-2013, 06:12 PM

moosestang

6th Gear Member

Join Date: Sep 2006

Location: Gainesville, FL

Posts: 11,278

I don't know what weight is recommended, but the royal purple synchromax is not a 5w30 oil, it's much thicker than that.

03-20-2013, 01:31 PM

cavediver

3rd Gear Member

Join Date: Sep 2007

Location: Eagle, Idaho

Posts: 578

If you call Tremec and ask what they recommend they will tell you Mobil 1 Synthetic ATF fluid. That's what I use in mine and it dramatically improved the shifting effort.

03-20-2013, 06:33 PM

moosestang

6th Gear Member

Join Date: Sep 2006

Location: Gainesville, FL

Posts: 11,278

Quote:

Originally Posted by cavediver

If you call Tremec and ask what they recommend they will tell you Mobil 1 Synthetic ATF fluid. That's what I use in mine and it dramatically improved the shifting effort.

Tremec recommends that, because that's all they have actually tested. They probably failed to mention that. I bet they get a kick back from mobil 1.

03-22-2013, 06:43 AM

cavediver

3rd Gear Member

Join Date: Sep 2007

Location: Eagle, Idaho

Posts: 578

Quote:

Originally Posted by moosestang

Tremec recommends that, because that's all they have actually tested. They probably failed to mention that. I bet they get a kick back from mobil 1.

Well, I have to say it was an excellent recommendation because it works perfect. Much smoother shifts than the Mercon Ford recommends.

03-23-2013, 02:13 AM

Justinsmt88

2nd Gear Member

Thread Starter

Join Date: May 2012

Location: Ohio

Posts: 315

Fords transmission fluid is complete garbage. I think I'm going to try the royal purple since I run that in my engine and rear end also. From the reviews I've seen it is a night an day difference. Just wish I would have changed the fluid out on my auto earlier. It'd still be in tip top shape if it wouldn't have been for the crappy fluid.