Re: 1956 400 Ultramatic Transmission Questions

Posted by d c On 2021/2/24 14:03:26

Yes. John is correct above . Beautiful car BTW. There may be a few things to check. Have you performed the band check and adjustment procedure? Info to the manuals here. I had one where the band control pistons were seeming to get stuck may have been debris or corrosion from long sleep as yours. Adjustments and exercise seemed to free things up. Have you read the normal operation and shift detents positions as they are a bit unique to the ultra. One detention starts in high and only lockup after. The other starts in low-shift to high at a very low speed then the lock up converter should give a sensation of almost another shift. Possible the converter clutch slipping?