RGV 89 GTA

i just installed a new throttle valve cable on my trans am, i drop the pan to make the install easier and change the fluid, i was looking at the valve on the throttle body and watched the way it works, so i adjust the tv cable to where the little hammer looking deal just touches the valve and made a note of where the tv cable was up on the bracket, and then i adjusted it the way your supposed to and it was almost in the same spot, just pushing on the valve alittle. So do u guys think that it will work i dont want to put the pan back on if its not going to work since i have had a problem with the tv cable not adjusting properly before.

87zjeff

iTrader: (4)

have someone hold the gas pedal to the floor and see if the "hammer" looking thing is touching the valve body and there is tension on the cable at the throttle body. if so, you are good. the idea is to hae the "hammer" on the valve body at wot.

RGV 89 GTA

the hammer just touchs it with the throttle closed and with the throttle at wot the hammer pushes the valve all the way in, to me that seemed right so i put the pan on and tried it, AND I STILL HAVE THE SAME PROBLEM AS BEFORE. , it still seems that the cable is to short and gets out of alignment at wot, i think im just going to modify the bracket and move it alittle more towards the throttle body and just adjust it to where it shifts at 15mph. what do you think?

87zjeff

iTrader: (4)

are you using the the trottle body or the gas pedal to adjust it? with the factory throttle body, i never could use it to adjust the tv. i always use the gas pedal. is the tranny factory? has it ever been rebuilt? if not, the spring inside the valve body could be worn out due to age and affecting the throttle pressure. most shift kits, even the small ones, take care of this. transgo makes a junior shift kit which addresses this problem specificly.

don't adjust the bracket, you can manually adjust the cable by moving it into the housing by one or two clicks. if that doesn't help, then either the cable is stretched or the spring in the valve body is worn out.

RGV 89 GTA

its a tci street fighter tranny and i just replaced the tv cable, i have a bbk 52mm throttle body as well, and im pretty sure i had the same problem with the stock one. and i know that the cable is adjustable but it still wont adjust correctly. if i press the gas pedal to wot and still adjust a couple of clicks back it still shifts to early and soft around 10 mph. i have it adjusted it back towards the firewall so that it shifts at 15 mph and it shifts like it should thru the gears but i cant go wot with out it getting out of adjust ment. is it better for the tranny to shift firmer or is it just as bad as it shifting soft and early.

87zjeff

iTrader: (4)

i was just reading what summit says about the tci street fighter and it seems like it is not much more than a stock rebuild. shifting soft and early isn't very good.they may have used a soft spring in the throtle valve. i'm not sure what they do to the calibration on theirs. i used a transgo full shift kit and the governor from a 4 cylinder to get my shift points up. i don't know what size boost valve tci uses in theirs either. i have a .500 valve in mine.

RGV 89 GTA

im pretty sure its not the tranny because i had the same problem on the two other transmissions that were in the car and having just replaced the cable i dont know what else to do but modify the bracket to bring it about half an inch foward. does the computer do anything to the trans mission other than lock the converter.

on a side note i put in b&m trick shift in the tranny after dropping the pan so far i think it pretty dam good, as far as shift feel, even with the problem that i have:

87zjeff

iTrader: (4)

the only way i could really get my shift points up was to get a 4 cyl. governor. it has the lightest weights of any of the governors. that tci unit probably has typical v8 governor weights. the bracket isn't the answer. i have a 52mm throttle body and a new tv cable and i haven't modified my bracket at all. before i used the 4 cyl. governor, i couldn't get my shift points up above 13-14mph. with the 4 cylinder governor at about half throttle with the .500 boost valve, i shift at 18-20mph. at wot, i am looking more at the road than my guage.....lol.

RGV 89 GTA

i see what u mean but on three different trannys with the same problem even on the stock rebuilt. could it be the stall convert, i had the first convert modify to have a higher stall on the first tranny, on the last two ive had the tci 2200 on it, this convert was also modify to fit the in the input shaft because it was the wrong spline.

camaronewbie

I'm very curious about this as well. My 700R4 now slips, where it didn't before. I swapped my 305 for a 350. With the 305, it didn't slip - after the 350 install, now it slips. I've adjusted TV cable til I'm blue, and still slips. I'm having a hard time believing that, before the swap, tranny was fine - actually shifted slightly harder than in my other Camaro, and after the 350, it slips.

I had the pan off the tranny, and noticed that at idle, my "hammer" is NOT touching the throttle valve at all, but at WOT it seems to push the throttle valve in. I'm wondering where the "hammer" needs to be in relation to the throttle valve at idle, and how far the throttle valve gets pushed in at WOT. Anyone have any sort of measurements for this?

87zjeff

iTrader: (4)

no because on each rebuild, they probably reused the same governor or a replacement just like it. the stall shouldn't affect the shiftpoints much. i have a b&m torque master 2000.

the "hammer" should have the throttle valve flush with the valve body at wot. the springs in the throttle valve wear with time. the cable can also stretch. at idle, the "hammer" may not touch the throttle valve.

Pro Built Automatics

The idle position is not that important as is the bell crank having the throttle valve plunger all the way in (just touching the plunger sleeve) at WOT. You only need the cable to be tight, or very close to it at WOT. The geometry (at the injector or carburetor) of where the cable attaches is the most important part here, if it is off by much, then you can have late or early part throttle shifts, while the shifts at WOT are ok.

camaronewbie

OK - so it sounds like my problem is definitely trandsmission vs. just bad cable adjustment then. Thanks Pro Built Automatics! (and let me know as soon as you have a "shipped to your door $299.95 special! LOL)