97 blazer front differential problem

I just completely replaced the whole front carrier minus the axles on my 97 Chevy blazer and now when I took it out for a test run the steering feels like it grabs and pulls to one side then the other or the tires are grabbing oddly, and I am confused as to why exactly. I made sure the axles were seated properly and everything was hooked up and bolted together right. Please help me.:banghead:

Thanks

I just completely replaced the whole front carrier minus the axles on my 97 Chevy blazer and now when I took it out for a test run the steering feels like it grabs and pulls to one side then the other or the tires are grabbing oddly, and I am confused as to why exactly. I made sure the axles were seated properly and everything was hooked up and bolted together right. Please help me.:banghead:

Thanks

Need more info here t help you.

Does it do it only 2W or 4W or both?
Or going straight down road or turning or with braking ?

It does it in 4 hi, 4 low (not as much though) and 2 wheel.
And it seems to do it all the time although it does it more going straight down the road.

Was this a used, complete front diff? Less the CV axles? If so, it sounds like a problem with the used unit.

Yes it was a used complete front diff no axles or anything else...
I was afraid it might be that

Most places will offer a 30 day warranty on use parts like that. Also, when replacing used diff's like that, you need to be sure it has the same gear ratio as the original.