I have a 1998 4L80E in my 1992 truck. It's been there for 25,000 miles or so.
Reading the ATSG manual it says there was a change in the force motor, seperator plate, torque signal compensator valve, and ecm.
Basically it gets rid of the cleaning cycle, which I've noticed when taking pressure readings on my truck the pressure does spike high every ten seconds.
It also says the 1991-1993 force motors operate at 292.5 hertz, and the 1994 and up operate at 614 hertz.
Is this going to cause problems running it like this?
Do I need to do a mechanical conversion to a 91-93 force motor, plate, and accumulator housing?
I can't change the ECM.
I'm still trying to figure out why this trans runs so hot anytime the converter is not locked up.
I posted about that and about finding clutch flakes in the filter, well it made the 1310 mile trip towing my camaro and 1000 pounds of cargo. During that trip the temps on the highway ranged from 165* most of the time to 220* tops.
The last 30 miles was low speed and hills, the temp got up to 245* because it doesn't lock up under 50 mph. I'm really anxious to get the filter out and see whats in it now, the fluid is not burned.
I may start collecting parts for a rebuild or at least a tear down and inspection. I'm really concerned about this force motor issue now. If anyone can offer what they know I would really appreciate it.