'98 c1500 very harsh 1-2 up shift

[PiercedBoy]

I have a GM reman that was installed a few years back that wants to snap your neck under light accelaration whan shifting from 1st to 2nd. Much worse in the mornings when it's cold.

I read a TSB somewhere awile back about possible valvebody?

Anybody got ideas?

[dunefreak]

Chris, I know you work during the week, but Chad (the trans tech here at the dealership) said he could take a look at it sometime if you want. It could be a couple things.

[PiercedBoy]

Oh cool! I'm off Mondays, give ya a call then.

Thanks

[pokrmny]

Are the shifts late,early, or on time? Have you check your pressures? It kinda sounds like an accumulator.