Has anyone had any problems with the gearbox hunting when
under hard, but less than full throttle acceleration? I have
experienced this a couple of times. Is it the box or is it my
cockpit error? I don't manually select but it acts as though
I should.
Between 30 and about 70 it will hunt between 2nd and 3d,
when I roll out of the throttle it is fine.

 

Have the same exact problem in my 89 with the 700-R4 tranny. It hunts 2x, then drops into 3rd. But it doesn't do it under light throttle conditions.
The tranny shop that did the rebuild about a year ago couldn't find anything wrong with it. At least I have the problem "documented" with them, just in case.

 

Could just be in need of a TV cable adjustment.

 

My 96 A4 does not do have that problem.

 

No TV cable on a 4L60-E. Computer handles all the shift parameters, they're hard coded into shift tables.

Recommend checking fluid level. These trannys are notorious for being very sensitive to fluid level. Mine functions best with the fluid level showing approximately in the middle of the 190 degree operating range cross hatch area, when of course, trans temp shows @ 190 or so on the digital speedo readout.

 

tough to feel exactly what alls going on with these units.especially in a light car.
the lockup convertor could be enagaging on you too.
would be neat to have a light on the lockup circuit.
only test i know of for the convertor is when your at cruise speed and light throttle (locked up) tap the brake and watch the tach,should raise about 1000 rpm instantly.
on my 4l60 (non E) it often feels like it shifts 5 times if i go from stop with fairly aggressive acceleration.
on your to isolate the prob,try and reproduce the hunting with the shifter in D (take odrive out of the picture).
got a fuse on the lockup circuit on those 4l60E trannys? would be nice to disable that circuit for troubleshooting purposes.(might work to jam the brake light switch but dont know without a schematic).
on a grim note-dropping out of high gear is a common symptom of a terminal tranny problem with th350's and th400's.
700r4's and 4l60's werent around when i was building units for a living.

 

Thank You to All, I will work with this and appreciate the help

 

Oh yeah, duh! :o I'm still stuck in 1990 land.

 

Typo? I bet you meant 100rpm. My '95 had a problem, fortunately while still covered by GM Protection plan ext warranty, where once the trans got warmed up the torque converter would not lockup in 4th (OD) at cruise. It was really weird: On the highway with cruise control on it would not lockup, BUT if you hit the accel feature on the cruise control to speed up instead of using your foot, it would then lockup, sort of bogging the engine slightly-- exactly the opposite of what the normal condition was supposed to be, i.e. supposed to be locked up in OD and when you use the accel feature to speed up it should unlock to free up some revs. Anyhow, the benchmark speed I used to discover this was 75mph because I knew that @ 75mph the in-dash tach would show spot-on 2000rpm when tranny was working right and she was locked up in OD. With the malfunction, i.e. with the tc unlocked @ 75mph in OD, she would indicate approx 2200rpm on the tach. Tranny had to be cracked open twice within 8 month period to fix this right-- 1st dealership (ext warranty job) didnt fix it right and it re-occurred within 8 months, so of course i took it to a different dealership for the 2nd time. 2nd dealership found several elements of the 1st repair that the 1st dealership did not do right.

 

I had a problem with my 4l60e 1994 the shift from 2-3 and 3-4 was slow and not always there ,replaced the map sensor on the intake manifold about 6 mths ago. It started working fine.

 

Tell me more about this. Sometimes my 3-4 shift, even after all the work described in my prev reply, sometimes on the 3-4 shift under light to moderate throttle it seems to want to hang in limbo and bog a little. I'm wondering how the MAP sensor could have anything to do with this?...

 

opti

 

Not the opti because she pulls well to redline with no misses, plus this opti has only about 13,000 miles on it. Just that sometimes, not always, the 3-4 shift is slow and sloppy under light to moderate throttle but under harder throttle 3-4 shift is okay.

Been told a trans-go perf shift kit will eliminate the condition, but the post about new MAP sensor solving it for him caught my attention and piqued my interest.

 

The map sensor is the first thing to go ,it controls the shifting at wot
on the 4l60e trans.
The next is the 3-4 presure regulator sol in the trans if you have not replaced the trans filter there was an up grade a few years ago.
After you do all that it will work good for a while and last week mine went.NO 3-4 shift and its at the trans shop but I got another 8mths out of it ,Yes you can get more out of yours I was shooting it with 125 shot of nitrous when it went.
Try the map sensor first its cheap and only takes about 10 minutes to replace.
The shift kit will not help at this point the 3-4 clutches are going ,my trans man put 7 clutches in my to make it shift better.

 

When I have too much fluid in my 4L60e, it does hang on the 3-4 shift at 75% of WOT, esp at 60-70mph as I'm pulling away from a toll booth. Emphasis on the 75% of WOT. When it starts hanging at light throttle, 1-2, 2-3 or 3-4 shift and I think my trans is going...it's been my opti both times....

Eric

 

"Typo? I bet you meant 100rpm."

no typo,just a brainfart :bb
how about,"tach should raise a fuzzy"