[rickpilgrim]

Clinebager, thanks for all your help on the forum here!

We've been going through 4L80E's like cookies at a bake sale on one of our trucks. Doesn't matter if they are rebuilt by Movarus, Good wrench , local shop or junkyard. I only am given a 90 day warranty on these as it's a snow plow(commercial) truck.
We have no check engine light, nothing shows up on the Verus, I have a pile of 2500 mi or less trans coolers and lines plus three new radiators installed to get any warranty. All of them have good line pressure when installed but in a few miles you notice it take longer to engauge first or reverse but still have clean fluid, another 500 mi or so you start to get soft shifts and some flaring between shifts, new fluid and filter and line pressure is 10-16 psi lower and soon the slipping in 1/2/r is very noticeable and we stop running it.
98 K2500 reg cab long box 5.7 powered truck.
We and dealer think it's an ecm/wiring Janessa problem, do you have any ideas?