did a break my input shaft?

[Daniel50]

so i get a bad vibration in the car at 4k rpm's to redline. you can really feel it hard through the shifter. the motor mounts and tranny mount were just changed after i felt this vibration. so that wasnt it. it does this in neutal and with the clutch in so i know its not the driveshaft. the motor does not shake at all so i know its not the motor. would this be the input or the output shaft? this all happened when i went to downshift from 5th to 4th and it started to do it when it hit 4th. does this is every gear

 

[bill302]

have you checked the balancer...i would ensure the balancer rubber section has not tore or slipped.

 

[chaos254]

my car does the same exact thing and I haven't been able to figure it out. I'm assuming its the tranny itself(shaft might be bent? flywheel? i have no clue lol).. I also replaced the driveshaft, motor/tranny mounts, balancer after this happened and none of it has fixed the problem. It's been like this for awhile now.. let me know what u find! Does your shifter shake when your idling as well?

 

[DDSTANG94]

PIOLT BEARING, BLOCK RING, NOT SURE ON ETHER BUT I WOULD THINK YOU WOULD KNOW IF YOU SNAPPED THE INPUT OR OUTPUT SHAFT

 

[99FiveOh]

seems to me if the input shaft doesn anything, it will snap in two and the car won't move. I'm having a similar vibe problem and I'm suspecting my clutch. I will know for sure soon. I'm thinking a piece of the disc might have broken off and thus causing an imbalance, that or the pilot bearing is messed up.