CAMARO6 - View Single Post

DorkMissile · 10-01-2018, 08:58 AM

Have to be careful with Tremec transmissions - they recommend using ATF, but non-synthetic Dex3 spec, not full synthetic ATF. Most synthetic ATFs have detergents (anything Dex4 approved has detergents in it - it was required to be Dex4 approved), and the detergents can cause swelling of of the composite components which will lead to fast wear of the shift forks.

Royal Purple has a product called Syncromax - which is a full synthetic lube for manual transmissions & transfer cases but it does not have the detergents in it. I've had it in my car for about 1500 miles (put it in at 1500 miles on the odometer) and to me, it is significantly smoother shifting than with the factory fluid. It is much thinner than the OEM stuff. Its not cheap (about $17qt - you need 4 quarts), however many on the forums are using it.

Several are also using RedLine D4 with good luck also.

Just steer clear of anything Dex4 approved.

10-01-2018, 08:58 AM	#8
DorkMissile Drives: 18 1SS 1LE HyperBlue Join Date: Aug 2018 Location: Twin Cities, MN Posts: 612	Have to be careful with Tremec transmissions - they recommend using ATF, but non-synthetic Dex3 spec, not full synthetic ATF. Most synthetic ATFs have detergents (anything Dex4 approved has detergents in it - it was required to be Dex4 approved), and the detergents can cause swelling of of the composite components which will lead to fast wear of the shift forks. Royal Purple has a product called Syncromax - which is a full synthetic lube for manual transmissions & transfer cases but it does not have the detergents in it. I've had it in my car for about 1500 miles (put it in at 1500 miles on the odometer) and to me, it is significantly smoother shifting than with the factory fluid. It is much thinner than the OEM stuff. Its not cheap (about $17qt - you need 4 quarts), however many on the forums are using it. Several are also using RedLine D4 with good luck also. Just steer clear of anything Dex4 approved.