IT_SS

iTrader: (5)

Has anyone used this valve body with the 4L80?

IT_SS

iTrader: (5)

I'll take that as a no

Pennington55

iTrader: (3)

good question... i was wondering the same. my 4l60e took a dump. id like to do a 4l80e with a rmvb, transbrake, and a ratchet shifter in my car.

Jake's Performance

iTrader: (2)

We do a full manual valve body (forward) pattern transbrake 4L80E.
We have a Holiday Sale going on now.

I've tested most of the 4L80E valve bodies but I haven't tested the TCI transbrake.

IT_SS

iTrader: (5)

I see a lot of forward patterns but not many in reverse... :-(

Jake's Performance

iTrader: (2)

I guess the "reverse pattern" valvebody seems "sexy" to some but redesigning the 4L80 valve body to be reverse pattern creates some drawbacks.

Reverse pattern came about on TH400s because it was required to use the modulator circuits for a transbrake and no other functional reason.

I looked at making a 4L80 RMVB and the issue I see has to do with supporting the OD sprag with the overrun clutches in 1-2-3rd gear.

My experience with 4L80s has also taught me that the closer you leave the circuits to stock, the more consistant and reliable it will be.
I suspect Rossler had the same experiences when he designed his transbrake.