buzzman1

just replaced tbi with carb ..used all correct brackets for tv cable. drove car for like 15 minutes with cable not adjusted right then figured out how to adjust it, now car shifts very hard from 1-2 at like 2700 rpm. have had car for 10 years and never had a trans issue, always strong now it slips and shifts hard from 1-2. Does this sound like a tv issue or is there a shift controller that could be stuck...not a trans guy.

Thanks in advance
Buzzman1

Atilla the Fun

a brutal shift at just 2700 rpm.. I'm assuming that's at part throttle, not full throttle? If my guess about that is correct, then I don't think you got the adjustment correct yet.

ed o

the only way to tell if the adjustment is in fact 100% correct is with the trans pan off. The arm should just meet the plunger internally in the trans while the throttle is at rest. at wot the plunger should be buried. from there you can adjust shift firmness by changing the distance from center of the connection at the carb. Make sense?
Probably not as most people don't realize that connecting the t.v. cable doesn't move the arm to the plunger. Custom installs almost always require this procedure to get it correct. not trying to be a buzzkill, just trying to help get to the root of the problem.
there is no controller for any shifts of your trans. 1,2,3 or 4.
t.c.c. does require wiring but not for a second gear shift.

buzzman1

not being a buzzkill at all...if I thought the carb swap was easy I would not have tried it. I do have a switch for the tcc and Ill try removing the pan to get the tv correct. What are the odds I screwed it up permantly by driving with this not right?
Thanks again
Buzzman1

Atilla the Fun

If your pressure regulator spring in the front pump isn't too stiff, then the worst you will do is hurt second gear. Far worse to drive around with the cable not connected at all then set too aggressively. I once toasted a rebuilt 700 within a month by driving it around at 15 psi of line pressure, but it wasn't the TV, it was a broken pressure regulator spring. They tore it down, then gave me another 700.

buzzman1

I adjusted the tv again and it seems much better..thanks for the help, I will get it to a trans shop to check it with the pan off but I had one more stupid question, when should the tcc lockup switch be on?

thanks once more,
Buzzman1

Atilla the Fun

converter lockup can happen in second, third and fourth, depending on how GM set it up, but that's what the trans is capable of. I've only ever set my 700s up to lock up in fourth only, because my cruise rpm is always lower than the rated stall rpm of my torque converter. If you try that with no lockup, you'll overwhelm even the best ATF cooler.

buzzman1

so by just locking it up in 3rd or 4th it should be ok.

thanks
Buzzman1

Atilla the Fun

it only needs to lockup in fourth.

mark87Z28

I have a similar setup where an L69 / 700R4 replaced LB9 and a 1970 quadrajet is the new carb. The tv cable connector was broken where the cable connects to the carb so whomever wrapped the cable around the stud on the linkage and zip tied the end.

On takeoff, if I hold the gas down without releasing the transmission seems like it is never going to shift and when it does it really kicks and barks the tires. On the other hand if I release early the transmission will shift. While crusing I can get the transmission to shift by releasing the throttle.

At highway speed and holding a constant speed if I press on the gas the slightest the transmission will down shift and then upshift once I let off.

I've adjusted the cable every which way and the above scenario is the best I can get.

The next move is to get a repair thingy for the tv cable connector and try to adjust again. Then maybe pull the pan like ed o says and have a look.

buzzman1

since the temp hit 70 in Chicago today the car will be getting a beating on the street tonight after my son goes to bed...Ill let you guys know how it does.
Thanks again for all the info....hope i dont need the tow truck to get home, after all the money spent this winter I dont think the old lady will let me in the house if it comes back on the hook.

Buzzman1

Atilla the Fun

wife aside, sometimes it's better to be on the hook than having to drive something that looks fast but gets beaten away from every light by any other car ever made. It's even worse when they recognize you having smoked them in the past, and now they can hear somethings wrong. It's a great way to catch flak about unreliable old american V8s, when usually there's nothing wrong inside the V8.