Jolt when Shifting from stop

[Hard Head]

Had a torque converter do exactly the same thing. Was so bad it would stall the engine. Had to replace and rebuild the tranny! Felt like a kick in the ass at times when shifting into drive or reverse. It would drive fine at hwy speed since the torque converter would lock up. Would stall the engine sometimes coming to a stop. Got worse as time went on. Should have replaced the torque converter earlier.

 

[dilvoy]

The torque converter idea is a good one. I Got a nice truck for free, because it sounded like it had a rod knock in the oil pan when at idle, but once the revs were raised, it went away. Turned out to be loose bolts between the flex plate and converter. There should not be much room for movement unless the holes in the flex plate are very ovaled out from pounding, but it is something that is not all to difficult to check.