Erratic Trans shifting

[Blackcar]

On occasion my 87 GN, when coming to a stop from cruise speeds of 50+mph feels kinda as though it's staying in fourth gear, (it's not the TCC as scanner reveals) then when it leaves from a stop, it shifts far too rapidly 1-2, then 2-3 at far too low a speed, giving the impression of lugging or surging the car, any ideas, someone mentioned setting TV adjustment???
Thanks,
Scott

 

[LC2 ROD]

Hey Scott, I tried to e-mail you but no responce?
Went to Mission raceway last weekend to watch some quick turbo cars run.

The scanner only tells you the ECM is sending a ground path to the TCC. to lock-up. Lets say a TCC solenoid had a short to ground when hot, then when the trans shifts to 2nd gear and turns on the TCC switch it could lock-up without a ECM signal.
This may not be your problem, but dont rule it out just on scanner data.

 

[HOTTOGO]

I'd listen to LC2 ROD the scanner is only checking that your getting the signal for l/u. Sounds to me like you have the classic tcc solenoid sticking after signal is off, very common with age and heat.

 

[Blackcar]

Makes sense...dduhhrr!

Thanks guys, Guess I need to remember I'm only reading what info the ECM receives, not necassarily empirical data! LC2 Rod, I didn't get your email, but if you're in Washington State, wherebouts? I'm in Bellingham. Oh yeah, I shouldn't fail to mention, first couple of times trans pulled this, it was caught out in the rain!! Thanks,
Scott

 

[LC2 ROD]

Re: Makes sense...dduhhrr!

Originally posted by Blackcar
Thanks guys, Guess I need to remember I'm only reading what info the ECM receives, not necassarily empirical data! LC2 Rod, I didn't get your email, but if you're in Washington State, wherebouts? I'm in Bellingham. Oh yeah, I shouldn't fail to mention, first couple of times trans pulled this, it was caught out in the rain!! Thanks,
Scott

Empirical? What'd you say bout my mama!!
Im a car guy not a experimental brain surgeon.

Don't you remember, I was the one that posted the "who's GN was that at Turbo Terrys"

In this case the scanner is reading a comand signal from the ECM not incoming.

 

[Blackcar]

Help with trans?

LC2 ROD,
Sorry man, totally spaced that other e-mail! What's your ride don't recall seeing it around, (I can't find old email to reference to) anyhow; you can email at e7c@gte.net, let me know. Oh by the way; Ken, (original GN owner) stopped by tonight and we're going to see about attending the GNRA meeting, later.
Scott