breaking transmissions and driveshafts

[racer96x]

Hey guys,

My friend has a 3 link Inca sportmod and so far he has gone through three transmissions and one riveshaft. Pinion angle is good. Driveline is straight. Anyone have any ideas to look at? We're stumped

[dirttrackrocker]

Do you have enough travel on the yoke??

[racer96x]

Plenty of travel. Doesn't bottom out at all. The transmission is breaking on the bolt ears by the bellhousing

[bluemod]

i had the same problem on my mod and we found hair line crack on the motor mounts letting the motor rock

[JustAddDirt]

Are you running a transmission mount?

[dirty white boy]

input shaft needs to be degreed to center of flywheel....

[AH55]

Are you running a transmission mount?

I would have to agree with the trans mount if your not running one. If this is a saginaw you'll break the ears all day long without one.

[racin6mod]

with a sport mod 3 link with a solid pull bar you should be getting enough axle wrap to put the drive line in a bind but I would jack the rear of the car up high enough to to get both tires off the ground (jack it up from under the seat area only) and check every moving part to see if it's binding. we never ran a rear trany mount with a steel bellhousing and never broke a trany case or a drive shaft. does this car us a middle or the old side mounts?

[bentfender]

if your running a long yoke u might be running out of splines on the tail shaft