Transmission shift point change...

This morning my transmission was delaying the shift from 1 to 2 by 1 or 2,000 rpm. The shift itself is crisp (as always) no slipping. When it's delayed, I would say it's even a harder shift than normal.

All other shifts are normal -- crisp and quick. Just the shift from first to second has been taking place later.

Throttle position switch? Solenoids? I could really use some help on this.

This is a '92 LS-L, with a new trans, as of a few years ago... The fluid looks nice and pink...

[Earthworm]

Are you still having this problem?

Actually, yes. Very infrequent, but still there. I've also always felt the shift from 1 to 2 was rather rough, clunky.

[Chiketkd]

Is there any way to intentionally change the shift points of our 4EAT's? Does any company offer a TCU tuning service?

-Chike

[Ron Mummert]

I'd bet it's the fender mounted resistor gone south.

Ron.

Originally posted by Ron Mummert
I'd bet it's the fender mounted resistor gone south.

Ron.

I've disconnected this in the past, and found it makes all shifts very clunky and the 1 to 2 shift even more clunky. But do these resistors go gradually, or all at once?

[Earthworm]

Measure your resistor. It should read around 10-12 ohms.

You could probably adjust the band brake slightly to balance the 1-2 shift with the 2-3 shift.

What it could also be is a sticky shift solenoid.

Originally posted by Earthworm
What it could also be is a sticky shift solenoid.

You know, this rings true -- what with the intermittant nature. Does the shift solenoid affect anything else? Is there a definitive diagnosis? Also, how difficult/expensive is it to replace? Aren't there 4? Should I do all of them at once? Thanks.

[Earthworm]

I believe there are 6 solenoids in our trannies. They might come as a pack.