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  1. J

    1988 TH 400 Kickdown Problem

    I bought a 1988 Chevy 30 RV with a TH 400 transmission and a 350 engine, and I'm having a problem on the highway. The trans fluid is at the proper level and appears healthy. It shifts great and seems to be working fine until I run it on the highway for a bit. At about 65 miles per hour it will...
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