When I floor it at the track, the tranny will go into second @ 4500 rpm in OD, but if I manually shift it, it will shift at any rpm I usually shift it at like 5800. Then it goes into second and stays there whether or not I shift it into Drive and the only way to get it to go into 3rd is to let off the gas almost half way, then once it shifts I can re-floor it and finish my run. It is killing my ET by about .4 tenths, is there anyway to fix this without redoing the whole tranny? And YES my TV cable is adjusted perfectly and has full travel until it's tight. When the car is in OD all the shift points are factory and they ALL work, except 2-3 somtimes still won't happen unless I lift.

 

I have the same problem with my TCI 700R4. I just backed the TV cable off 1/8" and everything works great! I even have WOT shift from third to fourth. The shifts in OD are a little more stacked than I would like but I am not going to have my ZZ4 crate engine with many mods zinggin up to 7000 RPM because my damn tranny won't shift.

 

Guaranteed that 60 (1.88) is not with a 2000 stall and streets huh. Nice times though, I'm glad to see you have the HOT cam.
What carb, a DP holley or what?

 

2400 RPM Stall, with slicks

That 60' was with a 600CFM Edelbrock carb ZZ4 intake and stock L98 heads. I now have a 750 CFM Edelbrock, RPM Air Gap and ported heads with larger valves. I liked my throttle response with the 600 setup better off the line but up top the 750 set-up pulls harder.

 

Did you get anywhere on this problem? I bought a ~10k rebuild trans /w a transgo, great on the street, zero signs of any problems, went to the track today and bounced off my 6500rpm rev limiter several times. And like stated, shifts fine with 50-75% throttle.

 

Nope I never did, I ended up putting that 700R4 in my stock 89 RS L03 daily driver and it shifts fine at the factory points. I dropped in a WC T-5 into my 90 and all the stuff in my sig, and gained .2 and 7 MPH with a 2.25 60 foot time! I just got in some Drag Radials so hopefully I can get some 1.8 60 foots now.

 

Well I have the very same problem also, And my TV cable has been adjusted correctly, I would like to know a fix to this wether or not I have to yank the trans or not. FYI it is a 89 th700r4

 

Did anyone read my earlier post? Back off the cable just till you can shift into third at WOT! Won't hurt anything, least of all your engine.

 

I want to know WHY, and incorrectly setting the TV cable isn't it. People have been posting this problem since 2000 and I still haven't read a good answer.

 

When you re-floor it (after it shifts into 3rd) does it still pull hard? Because it sounds like something might be wrong internally. My 700R4 in my 89 IROC does the same thing (gotta let off for it to shift), but it happens in multiple gears and multiple parts of the powerband. I'm pretty sure the clutches are about to go, but I will adjust my TV cable some more. This is the result of my abusive driving techniques on the track (drifting). Because I need the car to stay in certain gears on certain turns, I have to manually shift the transmission or else it will shift out of the powerband and I have no power to induce oversteer. From my experiences its a bad idea to manually shift the car while racing unless you have a manual valve body. And even then its not a good idea (but I'm talking roadracing type situations here). These things just aren't built from the factory to handle it. I knew it was going to break, but I already had an extra 700R4 on the side, so I went for it. When I eventually try my hand at re-building the 700R4 from my IROC, I'm going to use upgraded internals and a manual valve body. I still think it will break, but my plan is to have two of them and hopefully rebuild the broken one by the time the fresh one breaks. LOL! I Hope to be installing this 91 700R4 into my 89 IROC soon and start the cycle.

Leave the 700R4 in OD and it will love you. If it has the wrong shift points or does not shift firm enough, install a shift kit. Manually shifting it makes it more likely to break. I'm not an expert by any means, but thats my experience.

 

I've had the same problem (see sig), tried backing off the cable, didn't help.

From what I understand, it's excessive gap in the 3-4 clutch pack, either from not being assembled correctly or wear. Not having a functioning TCC lockup is often blamed as the wear culprit. That or lots of miles. In my case, I've had/got both.

 

In my experience, leaving it in OD, leaving it in D or shifting manually 2-D doesn't make any difference - it won't shift 2-3 at WOT (or anything close to it), and the shift kit didn't change anything.

Manually shifting isn't more likely to make it break (except more wear on the shifter & cable).

 

I have rebuilt mine and it still does it, so just putting in new clutches didn't fix my problem.