Mine wines when stopped or at idle or very slow driving then stops once I start moving. I am wondering what next.
TH400 rebuild
Thread Starter
Instructor
Joined: Apr 2012
Posts: 227
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From: Clarksville Tennessee
TH400 rebuild
Before I rebuild this tranny can someone answer a question for me?
I changed the carb from a 750cfm to 600cfm, could that change cause a vacuum problem creating bad tranny performance?
I was going down the highway and it wouldnt shift up to 3rd...just a whining (but still moving). I got home and changed the fluid and filter (clogged) and modulator. There were metal shavings which I was told is normal. The next morning the car ran fine going to work. At lunch I drove around the corner and it whined and did not move. I pulled over and it moved again, but slow. I got to a light and it stopped again. I pulled over and waited 15 min, pulled off just fine. WTH. I have since got a rebuild kit, and ready to do work. But something doesn't seem right.
I have a mild cam and the headlights never worked. I did a vac test and it was about 10-12hg before the swap. I am going put to test it now, but would the carb make that much of a difference.
I changed the carb from a 750cfm to 600cfm, could that change cause a vacuum problem creating bad tranny performance?
I was going down the highway and it wouldnt shift up to 3rd...just a whining (but still moving). I got home and changed the fluid and filter (clogged) and modulator. There were metal shavings which I was told is normal. The next morning the car ran fine going to work. At lunch I drove around the corner and it whined and did not move. I pulled over and it moved again, but slow. I got to a light and it stopped again. I pulled over and waited 15 min, pulled off just fine. WTH. I have since got a rebuild kit, and ready to do work. But something doesn't seem right.
I have a mild cam and the headlights never worked. I did a vac test and it was about 10-12hg before the swap. I am going put to test it now, but would the carb make that much of a difference.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Sometimes a converter will whine when the fins start hitting each other. That's a sign you are about ready for a rebuild, as the shavings make their way through the tranny and make a mess of lip seals and bushings. Causing a pressure drop and clutch pack slipping.
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
I probably should start another thread as I think I am high jacking the OP thread. But yes a full quart fill and changed fluid and filter after a couple 100 miles. No metal shavings. Whines in gear only.
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