Quote from: warwick on January 29, 2026, 05:58:56 PMI have a May 68 build 427 GTE (H servo C6) and I have been in a number of R servo C6 428/429's back in the day. I have a number of anomalies in my car. My GTE hits gears just like an R clicks off the shifts. I think I need to pull that cover off and see what I got.
It'd be interesting to know what you have, but if your 427 GT-E has an aluminum tailshaft housing I think it will probably turn out to be the normal H servo. All the cars that we found with the unexpected H had cast iron tail shaft housings. Also, all of them were Mustangs, either KR or 68-1/2 GTs, but that doesn't mean there aren't any Cougars, Torinos, or Cyclones out there. We found no 69-70 C6s with H servos.
I've had 3 CJ C6s over the years, and a GT500 C6. The GT500 wasn't anywhere even close to a match for the CJs, but if the transmission shifted any softer/slower it sure wasn't noticeable.