Tips on adjusting TV cable?

Coelacanth

Active Member
I read through several articles on adjusting the TV cable, one a good article from gnttype.org, and was trying to adjust it. Press in the D-shaped tab, pull TV cable towards firewall, then get in car with floor-mat removed and push the pedal to WOT until it clicks in place. This is supposedly the "GM approved setting". However, it seemed to me the car was late to shift into third on hard acceleration.

I tried readjusting it one "click" closer to the firewall from the "GM approved setting" and it was shifting too hard, building up too much RPM before shifting into second, third and even was reluctant to go into overdrive. After a firm jab on the pedal, I heard it "click" and the car was back to shifting more normally for cruising mode, but again not firm enough between 2nd and 3rd.

I read that a worn TV cable or bracket would allow the cable adjuster end to slip, and only return to the GM approved position, but I want the car to have the strong shift into 3rd that it had before working on the intake and adding an AXiS translator box & chip this summer. Just one notch back from this position should work.

Aside from replacing the TV cable assembly, are there any tips for getting this adjusted to a position that's optimal for shifting under WOT acceleration?
 
Last edited:
The most accurate way is to drop the pan and observe that the TV valve is fully compressed when the pedal is WOT/to the floor. That being said it is easy to do with a fresh install when fluid isn't an issue.
 
Best to drain the fluid and remove the transmission pan as stated above. At this time you can then easily and accurately measure the plungers movement making adjustments to achieve what is recommended. Here is a link from Lonnie Diers (Extreme Automatics). However, this may only be for his transmissions which feature his own modified valve body and uses several unique parts such as different plunger spring,etc.
Always good to check your tranny fluid pressures as described.

http://www.extremeautomatics.com/assets/pdf/2004R_Transmission_Install.pdf

You might want to contact Dave Husek at Turbo Buick Performance http://www.turbobuickperformance.com

or Chris Kokkonis at CK Transmissions for their suggestions. http://www.ckperformance.com
 
I read through several articles on adjusting the TV cable, one a good article from gnttype.org, and was trying to adjust it. Press in the D-shaped tab, pull TV cable towards firewall, then get in car with floor-mat removed and push the pedal to WOT until it clicks in place. This is supposedly the "GM approved setting". However, it seemed to me the car was late to shift into third on hard acceleration.

If that is on the gnttype.org site, it should be removed. As the factory service manual explicitly states to not use the gas-pedal to ratchet out the TV cable. See this link for the best (and easy) method:

http://www.turbobuick.com/threads/tv-cable-used-to-self-adjust-not-now.431569/#post-3588724

RemoveBeforeFlight
 
Thanks guys. Here's just one of the articles I read on adjusting the TV cable; most of them state to press the pedal to adjust, after removing the floor mat. I actually have RmvBfrFlght's linked article printed too (I like to cover all my bases before doing something). ;)

http://www.gnttype.org/techarea/transmission/tvcable.html

I think I'm pretty close because after honing the TPS with a rat-tail file and re-mounting it, I get idle TPS voltage of 0.43 - 0.45 and WOT around 4.50 to 4.55. I took it for a spin last night and it seemed to be shifting normally, and I got a nice chirp going into third. If things change, I have a print-out of your procedure in the garage. Thanks again.
 
Thanks guys. Here's just one of the articles I read on adjusting the TV cable; most of them state to press the pedal to adjust, after removing the floor mat.

Yep, not sure where that originated from, but it's wrong. From the '87 FSM:

TV-Cable_Adjustment.jpg


I've also seen that exact same warning in other GM FSM's for the 700R4.

I actually have RmvBfrFlght's linked article printed too (I like to cover all my bases before doing something). ;)

Can't go wrong there :cool:

I think I'm pretty close because after honing the TPS with a rat-tail file and re-mounting it, I get idle TPS voltage of 0.43 - 0.45 and WOT around 4.50 to 4.55. I took it for a spin last night and it seemed to be shifting normally, and I got a nice chirp going into third. If things change, I have a print-out of your procedure in the garage. Thanks again.

That small variance in the TPS voltage is to be expected.

RemoveBeforeFlight
 
Back
Top