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Feb 27, 2022 | 03:51 PM

Golferdad

Thread Starter

Burning Brakes

Joined: Feb 2022

Posts: 988

Likes: 183

From: South Carolina

Help

What would cause the transmission to all of sudden stop shifting to second gear. And has plenty of fluid.

Feb 27, 2022 | 04:33 PM

ukjohn

Racer

Joined: Oct 2018

Posts: 459

Likes: 134

From: England

If you are talking about a TH350, it happened to me 2 weeks ago. In my case it was just the vacuum line to the modulator had come off.

Feb 27, 2022 | 04:46 PM

Motorvation

Racer

Joined: Jul 2018

Posts: 331

Likes: 123

From: Sandusky, OH

Quote:

Originally Posted by ukjohn

If you are talking about a TH350, it happened to me 2 weeks ago. In my case it was just the vacuum line to the modulator had come off.

Number One answer for either TH350 or TH400. Never saw a TH350 lose 2nd that wasn’t low on fluid. They have huge diameter frictions and steels that seldom get burned up.

Maybe a slim chance that the plastic gear on the vacuum modulated has deteriorated and “apple cored” (in appearance). Then it can be no be turned by the drive gear on the output shaft, which is machined on the shaft.

Steve O.

Feb 27, 2022 | 06:31 PM

Golferdad

Thread Starter

Burning Brakes

Joined: Feb 2022

Posts: 988

Likes: 183

From: South Carolina

I think so,and just out of curiosity where is this located underneath the car,if so during this time,a few hrs prior I was underneath it,and could have easily broke something on it.especially some type vacuum line.

Feb 27, 2022 | 06:57 PM

vettebuyer6369

Administrator

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From: About 1100 miles from where I call home.

Please do not continue to list threads with just “help” as the title. Multiple threads with the same title and no description doesn’t give members a reason to read them.