S10 2WD Extended Cab Driveshaft Alignment Kit for 4-cylinder, 6-cylinder, and V8

  Why You Might Need One. The failure rate of double-cardan style U-joints in extended cab S10s is high. This kit reduces the driveline vibration and wear responsible for the failures, improves power transfer to the rear wheels, and slightly improves fuel mileage for stock 2WD Extended Cab S-10 Trucks and 2WD Blazers.   Ordering Guidance. 2° for trucks with stock ride height, 3° pinion alignment shims for trucks with the ZQ8 sport suspension or lowered 1–2 inches, and 4° for trucks lowered 3–4 inches. Background on Driveshaft Misalignment. Beginning around 1995, the extended cab 2wd V6 trucks with automatic transmissions included the constant velocity “double-cardan” style U-joints (shown above), to reduce driveline vibrations on extended cab trucks.   The double-cardan U-joints have a high failure rate on S-10 Trucks that have been lowered, or driven heavily loaded, due to extremely bad driveline angles.    On a stock 2wd extended cab S-10, the misalignment between the rear driveshaf