Anyone Have Problems with TCC Slipping when using Royal Purple Max ATF
Thread Starter
Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
Anyone Have Problems with TCC Slipping when using Royal Purple Max ATF
Has anyone had problems with their torque converter lockup clutch slipping when they switched to synthetic?
Rebuilt my tranny couple of months ago. Back to stock tune with Protorque (recently refreshed by them) 3,000 stall lockup converter.
No knock retard, and brake pedal TCC switch is newly replaced and shows OK in PCMCOMM (have lt1-edit)...BTW, this is in my 95 Lt-1 Corvette Coupe.
Converter clutch slips above 65 mph or so when above 197F when throttle barely pushed past cruise speed to go a little faster....seems to hunt on-off-on-off. Pushing fluid temps higher than I'd like 230F
at 93F ambient.
Help
Rebuilt my tranny couple of months ago. Back to stock tune with Protorque (recently refreshed by them) 3,000 stall lockup converter.
No knock retard, and brake pedal TCC switch is newly replaced and shows OK in PCMCOMM (have lt1-edit)...BTW, this is in my 95 Lt-1 Corvette Coupe.
Converter clutch slips above 65 mph or so when above 197F when throttle barely pushed past cruise speed to go a little faster....seems to hunt on-off-on-off. Pushing fluid temps higher than I'd like 230F
at 93F ambient.Help
Melting Slicks
Joined: Feb 2004
Posts: 3,307
Likes: 111
From: Tucson AZ
I have been using Mobil 1 synthetic ATF in my 700R4 for over 15 years without problems. We also use it in the race transmissions, but they do not use lockup converters. Some of the guys still use the old Type F in the race transmissions because it slips less.
I have not tried the Royal Purple only because it is more difficult to find and more expensive. I have heard of good results using Royal Purple synthetic engine oil.
I have not tried the Royal Purple only because it is more difficult to find and more expensive. I have heard of good results using Royal Purple synthetic engine oil.
