I mean smoother. I have a bad input speed sensor (code P056/OBD I) and the shifting is more firm then stock with that problem. The Dexron VI made it shift noticeably smoother.Hey clarkz71, when you say shifting was improved, do you mean smoother or more aggresively? Also could we you use the B&M transmission fluid for firmer shifts in our trannies?
I don't know if my clutch packs were doing anything, but if you know cadillacswhat you are actually feeling is the fact that the older fluid has been allowing the cluch packs to shudder but at high frequency so the new stuff has a friction modifier to help with that and its a synthetic too.
What is B&M's blue trans fluid?Hey clakz71, when you say shifting was improved, do you mean smoother or more aggresively? Also could we you use the B&M transmission fluid for firmer shifts in our trannies?
Ed,Does anyone know of a manufacturer of a true group IV ATF, besides amsoil???
General Motors Powertrain has recently upgraded to DEXRON®-VI ATF with the start of 2006 vehicle production.
Current and prior models that had used DEXRON®-III must now only use DEXRON®-VI.
All 2006 and future models that use DEXRON®-VI are to be serviced with DEXRON®-VI fluid only.
DEXRON®-VI is an improvement over DEXRON®-III in the following areas:
Extended Factory Fill For Life---160,000 km (100,000 mi) For Cars and Light Duty Trucks*---80,000 km (50,000 mi) (Severe Use) For Cars and Light Duty Trucks*
Clutch Friction Stability----Improved 100%
Clutch Durability Due To Fluid----Improved 120%
Oil Film Thickness----Increased 20%
Fluid Oxidation----Improved 100%
Shear Stability----Improved 200%
* These ATF change intervals remain the same as DEXRON®-III for the time being.
Your recollection of Roman Numerals is correct... and I have no idea what GM did with the numbers IV and V. I've never seen any reference to Dexron IV or V (other than a few typos of people who meant the new VI but assumed GM went to IV).This is a very dumb question, but... I thought III = 3 and IV = 4, V = 5, and VI = 6 (am I correct on this?), soooo, where are DEXRON-IV and DEXRON-V? GM didn't like them or what?