1988 Holden Jackaroo transmission problem

[KirkW]

Hi

Firstly thank you so much for your help! I've got an intermittent issue that I assume is electrical and we all know how hard these things can be to solve.

If anyone can point me in the direction of what I could check or test. I haven't been able to find much info online.

The below issues can occur independent of each other:

-Only appears to be an issue when the car is warm (but could be coincidence)
-Transmission has displayed a few different issues
--Stuck in low gear
--Dropping to neutral between shifts
--Holding gears longer than it should
--OD light flashing (not flashing like a warning, flashing like a loose connection, this only happened when it was stuck in low gear)
-Idle raises to approx 1200 RPM with in P or D while this issues are occurring.
-Once car has been sitting a while it all returns to normal

Other information:
-Trans fluid looks and smells clean
-Trans not slipping

My thoughts:
-Possible relay
-Possible ECU
-Has had a few oil leaks over the years so maybe a fouled connector

[geeves]

What engine?
Im thinking ecu or valve body