T-5 Fluid Change Question

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01-14-2009, 07:32 AM

#11

Jfsram

4th Gear Member

Join Date: Jan 2007

Location:

Posts: 1,999

I run Synthetic ATF, tried GM synchromesh and there was even thick 90w gear oil in it when I bought it. All have no noticeable difference but I do sleep better at night knowing I have the good stuff in there.

01-14-2009, 12:20 PM

#12

94Blk5.0

5th Gear Member

Join Date: Jun 2007

Location: NC

Posts: 2,112

I put RP Synchromax in mine at 135K. No problems...

01-14-2009, 05:09 PM

#13

AmericanPowertrain

Former Sponsor

Join Date: Sep 2008

Location: TN

Posts: 151

I like Synchromesh

We use Synchromesh in everything. ATF won't hurt a thing, but Synchromesh is heavier and clings to the synchros, helping synchronization. I see that someone, I think it's Penzoil, now has Synchromesh at the parts stores. Either GM's protection on the forumula ran out or they licensed it out. It was about four bucks a quart cheaper than getting it over the counter at a GM dealer, plus it keeps you from having to visit the Bowtie boys. AP