Bouncing Feeling In Overdrive

[lowjack72]

Hi,I have a 93 k1500 4x4 extcab 8/bed(the limo)5.7ltr/700r4trans.

I recently had issues with the ground wires and ignition module.Now that thats fixed i have a bounce when the tranny shifts in od between 50 and 60.It is not constant but is frequent,even when i put her in cruise it has like a bouncing feeling.I thought it might be electrical,with having the recent other elec issues,but not so sure now.If i put her down into drive it feels more like a surge and not as bad.She seems to have plenty of power,and goes through the gears fine.The only other thing i was considering was that mabey it was in the drive shaft (being the 2 section carrier bearing)mabey the rubber mount is bad?.the best way to describe it is feeling it in the seat on your ass like the seat has a bounce.One last thing i noticed a leak in the pan gasket,and the stick was dry..and that was during this latest below zero cold stretch in ny.iIonly had to add a little for it to show on the stick so i doubt it went dry..ANY IDEAS?