tremec 3550/tko-what flud?

[fox3streetracer]

i put in synchromesh when i first got trans,and at next change interval.now its time to change again,and i was wondering if there is a fluid that i can use that will make it less notchy,but not hurt the trans.i was thinking about redline fluid.also i work at a gm dealer and we recently got in friction modified synchromesh,but no one knows what its for.so is the redline any good,or friction modified synchromesh?or is there another good alternative?

 

[84blkstang]

i would just use what the manufacturer recommends, because they can tell if you used the right fluid. If you od not and somthing happens then you have no warrenty

 

[wido78]

I just had one rebuilt and the person that built it for me spoke with Tremec and they suggested 3 quarts of GM Syncromesh.

 

[Grn92LX]

Just keep using the gm syncromesh.