hi there, please please bear with me here folks, i've just spent a nice hour or two reading as many of the prev posts to make sure i didnt repeat a prev asked question!
im now really shattered and its 2.51am!!!!! so i apologise for bad spelling, grammar etc

whilst i was driving around yesterday, my noticed when shifting into OD, what i believed to have always been the TCC locking up (keeping around 50/60mph constant speed) it appeared to disengage then re-engage continuously
pulsing.
i didnt like the look of this so manually downshifted to 3rd gear and drove to my destination.
on starting my return journey i shifted to OD manually and continued at around 70 mph. the TCC didnt seem to even engage in OD.

if i keep the tranmission locked down in 3rd, would i be able to drive around as normal until i got it fixed?
having read about excessive heat killing tranmissions, im quite willing to let the thing stay on the drive rather than pop the box, since i only just got it rebuilt.


3 days previsouly is was fine, cruising at about 80mph around 2000rpm. yesterday it would do 80 at about 2200 2300 rpm.
lifting off would drop the revs as if the TCC wasnt locked up.
i connected up a multimeter today between the ALDL port pins F and A started the engine and started off.
the TCC voltage dropped to 0v at 38mph (correct speed as per the prom fitted) for every gear, even OD.
whilst in OD at about 65mph,. i tapped the brake pedal to disengage the TCC. the voltage remained at 0v.
which to me says the TCC is still engaged.
i never felt the TCC engage in OD though.
now what am i to assume?
the TCC solenoid is up the shoot, the connector to the TCC is bad?(probably not since i'm getting a voltage) or the 4th gear od switch is knackered? or something else.

after i packed the car away for the night, i decided to take a look at the state of the ATF just for interests sake, looked about the right colour, but smelt ever so slightly not as it used to, not quite a burnt smell,
but you know when it aint quite as it should be.

basically, can anyone think what the cause of this is, and what to do about it.

replace the TCC solenoid, or switches or what.

now some info which may be of use to you all,
Just had the box rebuilt professionally, christ is cost enough anyhow!!, as far as i know all the clutches bands replaced. not sure about the TCC solenoid. and got a new TC too. done about 1000 miles since.
car is an '86 trans am. as you may have noticed a 700r4 box
ADS superchip, which i believe sets up the TCC to lock up at 38mph. (note i've had no problems with it till yesterday!!
dont do drag racing, just use it (when working) as my daily driver.
oh and engine, 305tpi lb9 call it what you will.

i'll test the 4th gear switch somehow, am i right in thinking i test the solenoid coil by getting a digital multimeter and sticking it across the A and D terminals of the 4 pin connector at the box?

ok, i'm orf to bed, thanks in advance to anyone helping, and if you read this, and have a slight idea, dont be afraid! post please!!!!!

laters
Phill

 

Sounds like your off to the right start, maybe check into getting a lockup switch that you hookup to the tranny, when you flip a switch to lock and unlock.

 

Correct.
Terminals "A" and "D" should go thru the TCC solenoid windings.

 

check the wiring harness that connects to the tranny, mine was doing the exact same thing as yours for the longest time, and it turned out to be that connector on the transmission wasn't locked all the way down and was loosing contact. might wanna get under there and check.