I ,m looking for a new unit ,it seems every vehicle i have restored has some light vibration ,i,ve always used old driveshafts ,changing u joints etc ,well i throwed this one out about 80 mph ,it throwed a cap off the front ,it exploded the trans case etc ,it made a mess ,trans is junk ,it had maybe 200 miles on it ,i blaming myself for this ,i have put more than a 100 ujoints in never loosing one ,this one got me ,clip or something wasn,t right ,it made a total mess ,almost came through floor ,car is stock restored 440 magnum 727 , i think i will put a new one in it ,just looking for the best buy ,thinking about that maybe it was the oreilly u joints i used .