Turbo 400 firmer shifts

[grandville455]

Guys whats the biggest u drill your feed holes too? I have a automatic valve body with the transgo kit in it holes are now drilled to .125 on 1-2 and 2-3... We are thinking about going to .156 on both.. too big?

[krazyhorse1]

.125 is the maxiumum for 1-2. but you can drill the 2-3 .140. but for the 2-3 you can grind the three raised castles off of the accumulator and put it in up side down. then you will have good and hard shifts.

[grandville455]

well this is what we did... we drilled the 1-2 to .137 and 2-3 to .147... Blocked off the gov to mod hole on the transgo plate... shimmed up 2-3 accumulator to tighten up band..... and ground the Big lands on two sides on mod valve....shifts like a dream!!...