81 z/28

hey guys, i just found a new part from suncoast. it is a kit that will convert a 5 speed allison into a 6 speed allison. the kit consists of a new valve body and TCM. how does this work and does anyone have any experience with this kit.

jblack6527

I saw that the other day. It would be interesting to know how it works..

TIM Z

iTrader: (12)

If its from Suncoast than i'd bet it works great.

TurboGibbs

iTrader: (6)

What you need is a 6 speed allison and a gear vendors and have a 12 speed Don't think they make one but would be funny.

Wide Open

I thought the new Allison 6spds added an overdrive gear via addtional clutches etc. How would changing the vavlebody add a gear? Is it similar to the JET 6spd valvebody for the 4L80E?

1TRUESS

iTrader: (16)

CONVERT YOUR 2001-2005
ALLISON 5 SPEED TO 6 SPEEDS
Drops 325 engine rpm @ 75 mph. Increases fuel economy, increases engine life. Requires valve body and tcm change ( 2 hours) No wiring, no modifications required. Indicate LB7 or LLY & year ** not recommended for stock trans with power adders.
Price: $1885.00* OUCH! All that for 325 rpms?

Blown02Sierra

325 for them is like 650 rpms for us. Does anyone know how it works?

Zick

iTrader: (18)

First your going to need an Allison trans, sure as hell ain't going to work in a 4L60E.