Best ATF Fluid

**ADICECCA21** · 05-10-2012, 06:45 PM

Was wondering what the best fluid was to put in the T-56 for a drain and refill. 59k on stock fluid. Was going to run Mobil or Redline synthetic but figured I would ask for opinions. Thanks in advance.

**1999slpss** · 05-12-2012, 07:58 PM

I used advance auto brand dex3 when I changed mine. Been thinking about trying synchromesh.

**ADICECCA21** · 05-14-2012, 05:58 PM

Yeah I would be curious to see how that works. Please let me know

**tatertot91** · 05-14-2012, 06:43 PM

I'm currently using synchromesh and am happy with it
It's not the recommended fluid but works well imo

**2002ssslp** · 05-14-2012, 06:53 PM

Originally Posted by 1999slpss

I used advance auto brand dex3 when I changed mine. Been thinking about trying synchromesh.

GM Synchromesh costs 75.00 for 1 gal at my local dealership. My rebuilder uses Valvoline high mileage Dex 3 ATF. He said it has additives that some of the others don't and it is much better for synchro wear. It works great in my trans.

**ADICECCA21** · 05-21-2012, 08:53 AM

That's what I wanted to hear!

**INMY01TA** · 05-27-2012, 08:57 AM

I've tried several (including Valvoline) and prefer Redline D4.

**2002ssslp** · 07-17-2012, 12:51 PM

I think Dino oil works better then synthetic. JMHO

**redbird555** · 07-18-2012, 04:24 AM

well technically is your t56 is pre 01 with the paper synchros you should not use synthetic because it tears up the synchros however a lot of people run redline and mobil 1 so take from that what you will but everyone thati've talked to who builds them recommends whatever dex 3 dino thats on sale that day