Hi everyone. I have a 93 W250 extended cab with a 5.9 gas burner and an automatic transmission and a np 241 transfer case. Someone took the 2 piece rear driveshaft out and replaced it with a one piece 3 1/2 inch diameter one and it starts vibrating at 50 mph. I need to know the lengths of both individual pieces of the original 2 piece driveshaft. All help is appreciated. Thank you

 

Or, check your u-joints, and maybe have the driveshaft balanced?

 

Rear section is 47-3/4" joint to joint on my '92 w250 (360ci v8).

I dont have a front section for an auto to measure.