What trans fluid are you using?

what transmission are you talking about?

Th350, Oreillys el cheapo Type F. Never failed me. Shifts nice and firm, although that is mostly attributed to the shift kit.

Most are universal to cover Mercon up to 5 and Dexron up to 3. Carquest red universal in the Pig's 4L60E....

Castrol Transmax High Mileage

-Gonz

I use acdelco dex6 and the Castrol dex6

I use generic Dex/Merc in all my older domestic transmissions. Even my BMW takes Dex/Merc since it has a GM transmission in it.

Type F is more agreessive with friction additives. Dexron was designed to slip more for smoother shifting. However think of these friction additives as having sand in your trans. The make firmer shifts but wear lubricated parts faster. I think today’s clutch material has eliminated the need for type f in a street car. But in a race car sure get all the help you can. I ran type f in my t-400 behind a 980 hp 565 and never smoked it.