i read threw some posts and people talked about the transgo kit fixing this problem. My car will only sometimes not shift into 3rd at WOT. usually it shifts about 4250-4500 but sometimes (usually while racing) it decides not to shift at all...hopefully my shift kit will fix this?!?

 

It will correct many of the common causes of this problem. That being said it really depends on the condition of the 3-4's as they are one of the weak points in this tranny, especially if you beat on it.

 

Does it shift reliabily when left on drive "D" and allowed
to shift thru the gears at WOT.? 1-2, 2-3....

Does it only screw up while manualy shifting at WOT?

 

I bought and had installed all the transgo goodies they had to sell other than the complete rebuild, corvette servo, .500 booster valve, reprogramming kit, and 3-4 upshift sleeve, 2800 stallconvertor. Now when I'm cruising in drive, light to medium throttle results in quick firm shifts 1-2-3-4. But, at the track when I shift manually I used to have a firm 1-2 at 5500rpm then 2-3 I have to jump up and down on the gas to get it to shift at the same 5500 rpm. Took a little tension out of TV cable, then I had a slip from 1-2 and a slip from 2-3 and it only when into third SOMETIMES. Tightened back up to factory specs-took it to 2 tranny shops, then GM dealer to make sure TV cable was set correctly-it was. Now I have the firm 1-2 at 5500rpm and it still won't shift into 3 unless I feather the **** out of it. The one time I left it in drive for a TT run the dumb thing shifted at 3500 rpm at every gear. So from my experience it won't fix it. I have another post floating around somewhere about my problems with this kit. I personally know of 2 other guys with this exact kit, installed by different tranny shops, and the same exact problem with not shifting into 3 at high rpm's manually. They also have to do the foot dance.

 

it will consistantly shift in D unless im on it hard...sometimes it wont shift into 3rd in D or manually. sometimes it does sometimes it doesnt. I think its about time to start stockpiling parts for a t56 swap what do you think

 

A transgo kit will fix the inherent faults, but it will not fix the problems you have as I recall. There's a difference between fixing the faults and repairing damage. If you're not getting proper 2-3 shifts without a kit, don't look at a kit to magically fix the 2-3 shifts because they are targetting the design flaw. With that said though, I had mine rebuilt and strengthened almost 10 years ago now and most of the work arounds and improvements made back then to my tranny were the trial runs at fixing the 700r4 that people now depend on today in the form of transgo kits. 10 years old (the tranny) and it still shifts hard today like it did back then. I may be engine limited, but it'll consistently give me shifts at 4300 rpm 1-2, 2-3. No feathering (cept at start to cut on peel) and just WOT till the end. I actually busted the gears in my differential only 4 years ago instead of busting the tranny with repeated hard launches on 15x7 rims. A well maintained tranny with regular fluid change and additives from time to time should last a good while. I recommend before the transgo go in, that its repaired to stock form first (or at least done while the kit is put in, else you'll still have the same issues.)

 

Mine does exactly the same thing.
Out if say 10 tests it screws up about 6 times when manually shifting 2-3 at wot.
It is intermiddent, hot or cold and not rpm related.
Of course it always does it when you really need it not to, like at the drags.
It does not slip or flair up between the 2-3 shift or loose the gear, it just doesn't shift.
It never does this on the 1-2 shift or or 3-4 shift or at part throttle. It never does this while auto-shifting in drive "D" or "OD.
at WOT (4500rpm). I like to manually shift @ 5500rpm
I believe it is caused by junk in the valve body causing a valve to stick. When I installed my shift kit ( Superior) I found a piece of metal stuck in one of the valves in the valve body.
After that it was flawless for a while but has started to act up again. I thought it was fluid level related but although the fluid does need to be full on the stick, thats not it. I have not had a chance yet to pull the valve body down again to inspect it.
But have been told by a trans tech that this is good possability.

 

I agree with transfixleo, if the 3-4 clutches are good then this kit (Trans-Go Performance Shift kit, Corvette servo, and the large boost valves) will help you out on this. I have these parts if needed, let me know?

 

I had the same problem with the 2-3 shift at the track with my old trans & kit. i dumped it for a 700 Raptor & WOT 2-3 shifts are firm, positive & right at 5900 rpm. I believe it has do with the oil pump cavation at 4500 rpm & up & stock 3-4 clutch pack slipping.

 

I think I have the exact same problem also.

EDIT: BTW I didn't realize this was an old thread when I posted :shrug:

 

yeah well at least yalls still shifts into third somtimes....mine finnaly let go this week. I was just minding my own business going down the interstate at about 55 mph and realized that it wasn't shifting into third. I guess the 2-3 clutchs couldn't hold on any longer.

 

About how long was it acting up before it went out?

 

30.000 miles...i could tell a little bit of slippage ever since i bought it.

 

My experience was that the kit didn't change a thing about my 2-3 shift. It works "normal" when I drive normal, but at WOT, it won't shift 2-3 when shifted manually or when in D or OD. Same before and after the kit.

Gotta get the thing out one of these days for a workover...

 

I guess Ive got the one and only good 700R4 made its from a 82 Caprice and has never been rebuilt. I talked to some transmission shops about this for my brothers tranny and they say the 3/4 cluch pack can cause this, TV cable adjusment or a damaged valve or valve body gasket. I swapped valve bodys in his truck and installed the transgo kit and it went away of course the transmission took a dump a few months back it did shift WOT from 2/3 after we worked on it.

 

91 camaro man...dont feel bad mine completely went. I posted this thread ALONG time ago. I never installed the trans-go. Im looking for a new tranny as i type