shudder at take off

[conn72ford]

So I am unsure if this should be on engine or drivetrain form.I recently replaced my rear drive shaft after snapping the old one. I noticed the previous owner had the grease fitting facing the wrong way so i removed the front shaft and the output shaft from the transmission so i could grease them, then i put them back on. I just got the Tires balanced because some of the weights fell off. so the truck was running and driving real smooth. Then i noticed when i take off in 2nd (np435 tranny) it starts going ok then it shudders then its smooth again, and smooth through the rest of the gears. Thought maybe vacuum leak so i checked and replaced the hoses they were old, still wasn't it. So i adjusted the carb since its getting to be winter anyways it needed to be done, and that didn't help either. I am pretty stumped as to what it may be any input would help. Thanks

[BobbyFord]

Got any oil leaking out the back half of the motor? Could be oil on the clutch assembly.

[tnlprt]

Or a spring broken or binding up on the Disc

[conn72ford]

it does look like theres a little bit of oil leaking at the rear of the motor, how do i check if theres a broken spring or if its binding?

[1 Crummyshooter]

I've also had a trans input shaft seal leak into the clutch. 2 clutches before I found that one.

[fordman]

Oil is one disgnosis. Glazed flywheel could be another. Or u joint not back on properly maybe.

[Fall_of_Olympus]

I'm experiencing a similar problem. Sometimes I get a low whine mid gear.