I have a 305 tpi motor that im planning on doing some mods too,but i also want to do some things to my 700r4.Right now it shifts at a good rpm but the shifts are very soft.It holds 1st 2nd and 3rd gear very well but lately seems like 4th is slipping.I just want to fix fourth gear from slipping and want some firmer shifts.Your website does not explain too much on the kits.I just want to know if i would want the heavy duty kit or the street/strip kit with the accumulator kit also. any help would be great thanks.

 

If you have a lot of miles and it is starting to slip a little in 4th, then the HD shift kit with Corvette servo & both boost valves should give you the best chance at keeping this unit alive for awhile. The HD kit already addresses the accumulation problem.

 

It was just rebuilt like 5k miles ago so its a fresh tranny i think the fourth gear is slipping but im not positive if its just something else making it feel that way.If my fourth gear was not slipping but i just wanted to firm up the shifts,would u still recommend the HD kit.thanks

 

YES!