1-2 Shift in '92 700R4
Thread Starter
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
1-2 Shift in '92 700R4
Lately I have noticed that in full-throttle acceleration, I get into the rev limiter before the transmission will shift from first to second. It seems like it will take a couple of seconds to make the shift. The shift is firm and will break the tires loose, but this doesn't seem right. 2-3 shift is OK - the shift will take place before the rev limiter cuts in. I have 30K on the car and the fluid looks clear and no smell to it.
Ideas??
Ideas??
Melting Slicks
Joined: Jul 1999
Posts: 2,875
Likes: 0
From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Re: 1-2 Shift in '92 700R4 (c4cruiser)
Sounds like your govenor is out of adjustment. I had the same problem after having my tanny rebuilt. The custom chip I have raised the rev lim to 6100rpm and my wot 1-2 shifts are just before 6000rpm. Stock valve trains are not good above 6200. :smash:
Instructor
Joined: Dec 2001
Posts: 151
Likes: 0
From: Mobile al
Re: 1-2 Shift in '92 700R4 (c4cruiser)
I don't like to make scarry statements but that is just how mine started to act before it I had to have it redone.
Mine got so bad that 1-2 and 3-4 were on the limiter, and I had to back off the gas to get a shift.
Of course mine had 128000 on it and looked like it had never ever had a thing done to it when I got it!!!!
I hope you dont have to go down the same road, but on the bright side, man what a difference it shifts firm and quick now, and 2400 stall converter is great!
Good Luck with it
Mine got so bad that 1-2 and 3-4 were on the limiter, and I had to back off the gas to get a shift.
Of course mine had 128000 on it and looked like it had never ever had a thing done to it when I got it!!!!
I hope you dont have to go down the same road, but on the bright side, man what a difference it shifts firm and quick now, and 2400 stall converter is great!
Good Luck with it
Thread Starter
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Re: 1-2 Shift in '92 700R4 (c4cruiser)
The governor was my first thought as all of the shifts are firm and quick especially at part throttle.
Now the biiig question: how will transmission shops handle a fix like this? Should I expect something like "You need a complete rebuild" or will a reputable shop do a diagnosis based on my explanation of the problem and then fix it?
I suppose this might be a good time to consider a shift kit and a complete flush. Any recommendations on a kit? I've heard good things about TransGo and B&M both. This is basically a street car with some autocross use. As for fluid, should I look at synthetic ATF like Mobil-1 or just stick with the Dexron IIe fluid?
Now the biiig question: how will transmission shops handle a fix like this? Should I expect something like "You need a complete rebuild" or will a reputable shop do a diagnosis based on my explanation of the problem and then fix it?
I suppose this might be a good time to consider a shift kit and a complete flush. Any recommendations on a kit? I've heard good things about TransGo and B&M both. This is basically a street car with some autocross use. As for fluid, should I look at synthetic ATF like Mobil-1 or just stick with the Dexron IIe fluid?
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: 1-2 Shift in '92 700R4 (c4cruiser)
My 86 is doing the exact SAME thing. Here is what I have had done so far.
Replaced governor with GM reman governor. (no change) However, the trans guy did notice that there was already a shift kit in the tranny. We are suspecting that the heavier 1-2 shift spring from the shift kit was used and pushed the 1-2 shift too far out. We tested this by using a heavier truck governor and the 1-2 shift dropped to 5500 rpm, but 2-3 also dropped to 4000 rpm. Plus, with the heavier governor, I dont have a kickdown to 2nd at at WOT going 60mph. We are going to replace/modify the 1-2 shift spring to lower the 1-2 WOT shift to 4500-5000 and put the Vette governor back in to raise the 2-3 WOT shift back to normal. Hope fully this will fix the problem I have.
Replaced governor with GM reman governor. (no change) However, the trans guy did notice that there was already a shift kit in the tranny. We are suspecting that the heavier 1-2 shift spring from the shift kit was used and pushed the 1-2 shift too far out. We tested this by using a heavier truck governor and the 1-2 shift dropped to 5500 rpm, but 2-3 also dropped to 4000 rpm. Plus, with the heavier governor, I dont have a kickdown to 2nd at at WOT going 60mph. We are going to replace/modify the 1-2 shift spring to lower the 1-2 WOT shift to 4500-5000 and put the Vette governor back in to raise the 2-3 WOT shift back to normal. Hope fully this will fix the problem I have.
