1987 iroc..700r4

I talked to a couple tranny guys, of course they are tryin to talk me into a complete rebuild $$$

its not the governor, and not sure if its the throtte valve? (is that right)

said 185 bucks to check/ fix that...and it could go bad again w/ out a complete rebuild.

I drive the car everyday..shifts fine when im not "racing it" or in a hurry...but when i even give it 1/2 or more pedel it needs to be let off, then it shifts like im in a manual vehicle..

weird:lala:

 

Reset the TV cable adjustment. If that doesn't do it, after resetting the cable lengthen the cable at the adjustor 1 notch and try that, if it still messes up, try one more notch lenghtened.

 

tranny guy messed w/ that and pulled the govenor...

so hard to trust mechanics when they are after the $$$

 

Which shift is it, that does not occur till you let off the throttle?

 

I'm betting it is in all gears when the accelerator is pressed down past 1/2. I went through this with my trans after the rebuild and new engine install. I ended up adjusting the TV cable out 2 notches from where it set itself to when going through the GM proceedure.

 

if im just crusin its fine...but try and gun itit will be fine until it gos to shift..

then it just redlines...until i let off then it shifts and i can go back to accelerating in that gear...

 

i have that same exact problem with my 2-3 shift going full throttle. mine has no problems at 1/2 throttle like his does.

 

gonna try and adjust it on my own..

funny

carcraft just had a guy write in w/ same prob..

again...throttle valve position...click to firewall to lower...front to rasie rpm shift point.

 

tryed throttle valve at every possible point...

shifts fine as long as im not flooring it...


hmmmm

 

Doesnt the govenor have something to do with shift points? The TV valve serves as the modulator right? Was this tranny recently rebuilt or did someone install a shift kit???

 

Did they check the valve body? Is it bad? Warped? Are the bolts tightened to proper torque?

 

Typically caused by excessive clearance in the 3-4 clutch pack, either from wear or poor assembly.

Adjust the TV cable the way it's supposed to be, or you'll hasten your appearance at the tranny shop door.

Yes, still waiting to fix mine.

 

valve body was not checked...have to open her up to check that...

said $185 if it was that and it may only fix it fer a bit if its not it, not knowing without going through the entire tranny.

 

I don't trust mechanics that much either.

I'd have to be watching them the entire time.

Get a manual book, and try doing some of it yourself.

 

I had the same problem with my 700. I recalibrated the govener with a tad heavier weights. Shifted fine since.

 

recalibrated w/ heavier weights?



how does that werk?

 

with the 400 in my old camaro, i went thru several trannys (its easier and cheaper to throw in a $50 junkyard tranny with a shift kit several times then it is to spend money on a new rebuild..... i was broke anyway )



it always did that right before the tranny went out..

if you want it to shift, you can do this...

floor it until you're ready to shift..
quickly lift past half throttle
mash the gas back down again..


it will shift, but its horrably abuseive to the tranny and you are really accelerating the wear on it. its terrible for it, so be aware that if you do that, you ARE abusing it and that WILL break it.


but i will let you mess around with that tranny in the car for a little while...

 

damn 700r4s...

same thing happended to the 85 iroc i had...ecept it got to the point it wouldnt shift out of first

 

after messing with the tv cable thingy shes started shifting right on redline... (had to adjust it myseld over and over)

got to test it out on a rx7 last night to lol

one thing though...

im not sure exactly what gears i have in the rear 3.23s? but in between shifts crusing it just hangs at 3-3500, is that because of the gears or because something is up w/ OD?

 

is my tranny toast?

revs up like its in nuetral..

like motor isnt hooked to tranny

 

you should go buy it

 

Dustin, I just had the same problem with my 92 Formula 700R4. Have someone at a performance center or a reputable tranny shop that does race jobs put a pressure gauge on your tranny, and go drive it. I was told it was my TV cable also, but it was not the case. I had some cross leaking happening in the tranny causing a drop in line pressure which would not allow the tranny to shift. Anyway, the leakage in mine was bad enough that I paid for a complete race rebuild, including a Superior HD shift kit, they work better in a 700R4 than a transgo, and a Corvette converter with a cut stator. I still have the same TV cable on the car, and the car is hitting so hard that the cable had to be backed off. Depending on what type street I'm on, I can bark the tires going into 3rd gear. Hope this helps!

La92WS6