700R4 Gear “Hunting”

[Burbinator86]

So I’ve got a 91 Burb V1500. TBI 350 with a 700R4. Both rebuilt within the last 30k miles. When driving down the freeway in OD it “hunts” and struggles to pick between 3rd and 4th. Not super rapid but fast enough to be an issue. I’d say if you matched stock blinker speed, that’s how fast it switches between the two.

Is this just a TV Detent adjustment issue? Or low fluid?

 

[Ricko1966]

So I’ve got a 91 Burb V1500. TBI 350 with a 700R4. Both rebuilt within the last 30k miles. When driving down the freeway in OD it “hunts” and struggles to pick between 3rd and 4th. Not super rapid but fast enough to be an issue. I’d say if you matched stock blinker speed, that’s how fast it switches between the two.

Is this just a TV Detent adjustment issue? Or low fluid?

Find out quick, or you will need another transmission rebuild.You can check your flyid,if it's OK. You need get a transmission pressure gauge

 

[gmbellew]

Are you sure it is the 3/4 shift bouncing or is it the TCC hunting? Could be an issue with the TCC lockup solenoid?

Does the issue go away if you keep it in D?

 

[Burbinator86]

Are you sure it is the 3/4 shift bouncing or is it the TCC hunting? Could be an issue with the TCC lockup solenoid?

Does the issue go away if you keep it in D?

When in what I call D3 (Not overdrive, 1-3) it doesn’t seem to. Where is that solenoid?

 

[gmbellew]

When in what I call D3 (Not overdrive, 1-3) it doesn’t seem to. Where is that solenoid?

solenoid is accessible with a pan drop. but if it doesn't hunt in D, it probably isnt the TCC lockup unless yours has been modified to not lockup in 3rd. then it could still be the solenoid if it has been changed to not lock in 3rd.