98 Blazer tranny

I have a 98 Blazer with 4 wheel drive when I put the truck in 4 hi it jerks & when I speed up it pulls to the right, when I let of the gas it jerks back to the left. I just put a difrent tranny in it is there something I might of done wrong. Because 4 wheel drive worked fine before. I used the same transfer case, that was in it before

Hi Bill
Sounds to me like you might have a mount misaligned or loose, Don't think the vacume lines to the front diff would cause this

Assuming everything else was perfect before you replaced the tranny and only the tranny and trasfercase were removed I cannot see how 1 would cause the other. My suspect would be that after fixing one thing you have exposed another problem.

I feel your pain I just finished the torque Converter in my 97. Finally got rid of the P1870 code I have had for over a year.