My 2-3 shifts tend to flare up during moderate to heavy acceleration. I came to conclusion (after many hours of searching) that 3-4 clutch pak might be going bad. I've read that its not an expensive fix, but I wanted to know if that was true?

Whats involved, and can it be done with the trans in the car??

I will probably be getting another 700r4 in good condition for 200 bucks. So, if the repair is more than 200 than I would just swap the trannies. Probably put in transgo shift kit.

One thing that kills me is that the previous owner of my car had the transmission re-built. I have receipts for it. For some reason they did not change the 3-4clutch pak but they put in new 2-4band and re-built TC and overhauled everything else. So, you can see why I am here in a bind.

I have a really good shifting 700r4 with a vette servo, but the 2-3 shift can flare up, and I fear the worse.

Let me know how much did it cost you to do it in a shop?
Let me know if its easy enough to do it with the pan out.

I appreciate it.


P.S. This is on a mint 92 TA vert. I am trying to treat her good...

 

Unfortunately, you have to remove the trans and pretty much disassemble the whole unit to replace the 3-4 clutch pack assembly. It'd definitely be cheaper to spend the 200 on the other trans. The Transgo kit is also a good idea. In fact, Transgo claims their kits will actually fix or improve a 2-3 shift flareup a lot of times.

 

i would hope any decent shop replaced the frictions in the 3-4 clutch pack. it will not list every clutch pack on the invoice. if they overhauled the rest of the tranny, they replaced the clutches. most shops set the clearance on the 3-4 clutch pack back to factory specs which is kinda loose for my taste.

 

Looking at the receipt, they had "master re-build kit installed" I am not sure what that is, but I am hoping that they did the 3-4 pak. They also did front pump bushing, 2-4 band, Filter, Re-built torque converter, and ATF fluid (ofcorse).
It took them 6.7 hours for "bench labor", another 3 to remove it and install it.
This was done about 50K miles ago. I am sure that the tranny should still be in decent condition. I've known of many that had well over 160K and worked flawlessly.

My question is, there are other reasons for the flare, other than the clutch pak's. Am I correct? Cable adjustment, fluid level (which is just a tad over full when warm) and the fact that some of the later 700r4 had the "flare" which was not slipping. I read about this, but was always discouraged when people who "hated to ruin my day" called on the 3-4 pak. Hmmm..

Do you think a transgo shift kit would be a good thing to invest in for this tranny???? How easy is to install??

 

A master rebuild kit definitely includes the friction and steel clutches, so they did 3/4. Flare can be a band adjustment problem.

 

Hmmm. Now that you say that, it got me thinking. I got a vette servo put in the tranny and the 1-2 shifts were hard, but yet not all that snappy. I had a bird with 700r4 before this one and she would have quick hard shifts and chirp the tires on 1-2 shift. The shift on this one feels like it catches and pulls forward, its hard to explain, its just not a fast shift. Which in this case could affect the band.

How do I go about adjusting the band ??

Would a shift kit help?? I am looking at the transgo one on summit. It includes a freaking VIDEO showing you how to install it. Dummy proof. Wow, they made something for me.

 

Well I'm getting my trans rebuilt and I talked to the guy about putting a vette servo in. He told me its good for racing and such but as a daily driver it has some flaws. So I asked what flaws and he was like 1-2 shifts are really nice and firm but 3-4 shifts are weak.

 

i wonder how he figures that since the vette servo uses the same 4th apply piston as all the other factory ones.

 

Besides that, if you want a better 4th apply than stock, just pick up a Superior brand billet 4th apply servo to go along with the Vette 2nd servo.

 

I have the EXACT same problem.......All other shifts are great, very firm....If I let off the gas at shift time it does not do it, and if it is cold it does not do it, but at the track, or on the street at heavy throtle it does flare......If I adjust the TV cable tighter it helps. It does not slipp any other time..

.Also, I thought the Vette servo was a bit better than the one in F Body 700R4's, when I ordered mine it was implied that it would improve the 1 to 2 shift, and the 3 to 4 shift....Is that not correct??? They are the same??? What other conditions can cause a 2 to 3 flare???