Over Drive TV cable Adjustment

[cfour93]

Ok can anyone explain how the overdrive shift point would change over night? I have 93 Vette Coupe and the trans were completely redone and little miles on it maybe around 3000 miles. I drove the car last week and fine it would go into OD at 42 mph. Today 83 degrees outside and sunny had to take her to work. I now notice that the tach runs up a little more and the OD shifts at 46 mph. Ummmmmm what’s up with this. Help can someone shed some light and maybe tell me if there's an adjust and how would you do this. I see the cables go into the ASR unit one to the trans, one to the throttle body and i believe on to the cruise. Where do I begin

Thank You in ADV.

 

[Hrtbeat1]

If Im not mistaken your car does not have a TV cable. I think they did away with them in '92 when they went from the 700R4 to the 4L60.

The adjustment on a TV cable is a two person job. One has to hold the pedal to the floor the other pushes a little button on the TV adjuster. The cable jacket should slide front to rear with the button pushed (with little clicks for fine tune adjustment). Anyway all the way back (toward the firewall) is the highest pressure and the starting point for adjustment. Move the jacket up (forward toward the nose of the car) one click at a time and then test drive. Let the car idle till it shifts to second then punch it, the tranny should shift back to first immediately. If it does repeat the procedure. If it doesn't back up one click (move toward the firewall). If you run at maximum pressure you will shorten the life of your tranny.

Here is a link to a tip sheet from some people that know trannies pretty darn good. http://www.transmissioncenter.net/700r4.htm Hope this helps.

 

[cfour93]

If Im not mistaken your car does not have a TV cable. I think they did away with them in '92 when they went from the 700R4 to the 4L60.

The adjustment on a TV cable is a two person job. One has to hold the pedal to the floor the other pushes a little button on the TV adjuster. The cable jacket should slide front to rear with the button pushed (with little clicks for fine tune adjustment). Anyway all the way back (toward the firewall) is the highest pressure and the starting point for adjustment. Move the jacket up (forward toward the nose of the car) one click at a time and then test drive. Let the car idle till it shifts to second then punch it, the tranny should shift back to first immediately. If it does repeat the procedure. If it doesn't back up one click (move toward the firewall). If you run at maximum pressure you will shorten the life of your tranny.

Here is a link to a tip sheet from some people that know trannies pretty darn good. http://www.transmissioncenter.net/700r4.htm Hope this helps.

Thank you i went and did some adjusting shifts fine but like i mentioned in go's into OD late. never had problems until i installed a chip resently that is the only change since last year. The guy that programmed the chip assured me that in 93 there was a TV Cable and the OD wasn't electroinic until 94. Hense the reprogramming would not effect the shift.. So i decided i will take it Sat. to where the Trans was rebuild. This needs to be good for the fest, It's hard to go to KY from MI with a messed up Trans....

 

[Hrtbeat1]

until i installed a chip resently

Ah Ha !

All My chips are reprogramed to shift later into OD. I like it better. Put your other chip in and see if it changes.


It's actually the lock/unlock of the torque converter that I change but it almost feels like the shift to OD.

 

[cfour93]

Good News

Ah Ha !

All My chips are reprogramed to shift later into OD. I like it better. Put your other chip in and see if it changes.


It's actually the lock/unlock of the torque converter that I change but it almost feels like the shift to OD.

I contact the programmer this morning and he explain in detail what the factory does and what he had changed, Wow a wealth of knowledge dang i wish i had learned about this stuff. I checked the adjustments on the cables fine tuned it and drove the car. Same results as described from the programmer. Swapped back to the factory chip car was, as I knew it to be. So hence every things seems to have worked out and why the converter lockup wasn't noticed when i first changed the chip i have no idea on that at all. But i will accept the good news and will also take it Sat to the Trans man to do so PMing on just to make sure.. Also thank you for helping out...