- Joined
- Oct 27, 2016
- Posts
- 2,513
- Reaction score
- 6,500
- Location
- MO
- First Name
- Spencer
- Truck Year
- 1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
- Truck Model
- Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
- Engine Size
- 225/6, 350 c.i., 350 c.i., 5.9l Cummins
80W-90 GL5 is what I have in my 79 and the 14b sf I built for a friend. Both have Yukon Dura-grips in them and that is what they recommend.