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Old 11-06-2013, 09:18 PM   #1
rou
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Help -th400 slipping in D engages in 1&2

The drivetrain sat for about 2 years during our resto. Got her running last month and ran great but leaks at the pan. I kept adding tranny fluid until I could change the pan seal, but two days ago it stopped engaging in Drive. It did work in 1 and 2. I changed the seal/filter and refilled fluid, still same problem. Slips badly in Drive but will catch in 1 or 2. Before I go to the transmission guy tomorrow, I thought I would go to you guys for suggestions.

Thanks, Rou
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Last edited by rou; 11-06-2013 at 09:59 PM.
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Old 11-06-2013, 10:41 PM   #2
WorkinLonghorn
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Re: Help -th400 slipping in D engages in 1&2

Go to the transmission guy tomorrow.

I'm no expert but in my limited experience, regardless of the initial cause, once a transmission "slips badly in Drive" it is toast.

If it just isn't shifting up, then that could be an easy fix, but if the 2-3 shift results in slippage, it is done imo.
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Old 11-07-2013, 10:48 AM   #3
rou
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Re: Help -th400 slipping in D engages in 1&2

Transmission guys says I have a forward shift issue. He is going to rebuild for $1000.
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Old 11-15-2013, 11:59 PM   #4
luvbowties
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Smile Re: Help -th400 slipping in D engages in 1&2

Quote:
Originally Posted by rou View Post
Transmission guys says I have a forward shift issue. He is going to rebuild for $1000.
In our area, building a TH400 is a bit cheaper than $1000. Actually, it is one of the cheapest autos, presently used, to re-build and still have a strong, serviceable tranny.
Sam
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