I have had an intermittent transmission computer for several years now. For the most part, it worked more than it didn't. But when it isn't working and stays in limp mode, it is quite annoying. Anyhow, it has become even more problematic. I finally narrowed the problem down to the transmission computer. I opened the computer and was greeted with a massive blob of some sort of rubber potting compound. I was able to push on the potting compound and recreate the intermittent problem. Perfect, all I have to do is remove the potting compound. Now that's where the problems start. I don't know if anybody else is crazy enough to pick away at all of that rubber but let me say that this unit was not designed to be serviced. That being said, I have given up on getting the circuit out.
I am looking at three options at this point.
How common are these computers on the used market? Do any of our members have spares to sell?
Since I program microcontrollers, another option is to build a circuit that will monitor engine speed and decide when to actuate the EL1 and EL2 solenoids. I am not sure how much time I want to dedicate to designing a controller for this old transmission.
Finally, I can do the modification to switch the transmission manually. I am a little concerned that one could accidentally shift from 3rd to 1st causing some major engine damage if driving at speed. (Hence the suggestion to come to a stop while in 3rd gear). Ideally, I would lprefer the automatic transmission to actually be automated.
Any comments
Mark,
1986 LeSharo gas, automatic
Montreal
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