transmission or transfer case on 1994 Ford F-150

when the auto transmission shifts in to a higher gear at 25-30 it jerks forward but it seems to take a lot of acceleration to move much faster 40-65

Asked by for the 1994 Ford F-150
1 answer 3 comments
When you say acceleration , are you referring to engine RPMs ?
Yes
Trans slipping? Try shifting through the gears manually to see where it 'flares' the most.
just drive . 2&1 are ok