Vibes from rear after SAS?

[ToyotaGuy88]

So I think I am getting some driveline vibes when I am accelerating and decelerating through just about any gear. I notice it most in second gear. If I mash in the clutch it stops though. It only seems to do it under a load. Could this be driveshaft imbalance? This is a Trail gear SAS kit, 4 inch front springs and 5 inch rear springs. The rear driveshaft I know was lengthened a couple of inches. Could it be a U-joint? Suggestions? Thanks!

Andy

 

[EVILSPOTTER]

To run u-joints the operating angles of the two joints must be equal. Is your pinion shaft parallel to your tailshaft?

 

[2ndGenToyotaFan]

Drop the rear shaft and take it for a spin in front wheel drive, that should narrow it down.

 

[bryan89]

i agree with evilspotter, if those two angles are not parallel, you will have to run a cv at the tranny output to eliminate wobble.

if they are the same angle, then it might just be a bad u joint. a couple of my friends who lifted older vehicles had ujoints go out on them shortly after. i guess its the added stress. new one fixed it right up.

 

[EVILSPOTTER]

Also, grab the female side of the splines & push/pull on it to chech for slack/unwanted movement.