700r4 if its an automatic
81 trans truck
That would be a 4L60E transmission.
Need to know the year.
R-134a
Th-700 r4
Not without major modifications. The 4L80E is shifted electronically, while the 700r4 is not. can you specify what kind modifications?
The only transmission that will work with the factory ECM/computor is the 4L80E
Chevy DuramaxDiesel. Its a Crew Cab 4x4 3500HD with the Allison Transmission. VERY nice truck.
Assuming it is automatic, read the dipstick, probably Dextron III.
The 1/2 tons used the 4L60E transmission and the 3/4 tons used the 4L80E in them.
The 1/2 tons have the 4L60E in them and the 3/4 tons used the 4L80E transmissions.
1/2 tons used the 4L60E and the 3/4 tons used the 4L80E