Re: Bucking Slightly at Cruising Speeds

Posted by Pgh Ultramatic On 2024/7/28 17:52:34

Are you sure the bucking is from the engine? It could be the feeling of the DD clutch engagement, if your throttle pressure is set far too high. Sometime drive the car accelerating at low throttle and see when it engages. Pay attention to the engine tone and try to feel a bit of a "thump" as the engine and drivetrain rev-match. If this occurs much above 30 mph then you will want to adjust the throttle pressure. Simply move the respective linkage about an ⅛" at a time towards the carb until it feels right when driving.

Torque tighten the low range brake band to specifications (per the manual) then re-test. If that doesn't cure it, or you are slipping in Low, just forget about it unless you want to drop the trans. But if you're leaking fluid, this should be on your to do list.

Keep in mind that the transmissions are the #1 neglected item on these cars due to difficulty in finding parts and service pre-Internet. But once in good shape and kept in adjustment, they should last probably 2 decades or 100,000 miles between major service.