I have a 1991 PU with a SAS the diff is out of a 93 PU with a v6. in the frunt the rear is stock
When I put the truck in 4x4 the back tires turn faster then the frunt. I have pulled both the frunt and back and counted the gears several times both counts are the same the ring has 41 teeth and the pinion has 10. Like I said I counted several times to make shure I was doing it right. My question is is there anyway the the transfer case could be the problem I have never messed with it before with the accept I have taken the shifter out when I replaced the clutch. Is it possable I just put it in wrong and the rear shifts to 4low and the frunt stays in Hi range. What else could cause this problem?

How do you know the back tires turn faster than the front ? What is the truck doing to make you think there's a problem ? We need alittle more info to help.

youre not driving in 4wd on pavement are you? if so that is your problem

We have alot of sand around here and when I drive in it you can acctually see the difference. The first time I realized the problem I was on a hard packed dirt road the truck would "feel" like it was running into something like it was binding up going in a straight line then the tires would slip and it would start the prosess all over again. I never have the need to use 4wheel drive on the pavement around here. No snow or ice around here.

the first thing i would do is jack up the truck and mark the tires and the D/shaft rotate the tire 1 turn count the D/shaft rotations make sure there the same.is there a locker in the frunt?

Originally posted by Pilgrmiii
I have a 1991 PU with a SAS the diff is out of a 93 PU with a v6. in the frunt the rear is stock.
What are you saying? You have a V6 3rd member in the front and a stock one in the rear?

If you have open diffs, jack both tires on one side of the truck and put the tranny in neutral & T-case in 4WD. Mark the tires w/ chalk in the same spot. Now have a buddy count the revolutions of the driveshaft while he spins it, and see how close the two tire's chalk marks are to matching after a tire has gone a full revolution.

If you hadn't counted the gear teeth several times, I'd be tempted to say that you had 4.10s in one axle, and the V6 third had 4.30 or 4.56s, since some auto toys had those from the factory.