Where does the seal go on the drive line? on 1990 Chevrolet Suburban 1500

if we replace the drive line where does the seal go?

Asked by for the 1990 Chevrolet Suburban 1500
which seal are you referring too???

rear seal
after you remove the drivshaft, you will have acces to the rear seal. take note to the ocndition of the bshing jst inside the rear seal area. look for wear on the driveshaft as well.

1 more answer
If this is a 2WD truck the tail seal is in the rear of the transmission. 4WD will go into the transfer case.
There is also a pinion seal that goes into the rear drive axle.