LONGTOM
Junior Member
- Joined
- Aug 1, 2016
- Posts
- 2
- Reaction score
- 0
- Location
- Virginia
- First Name
- Frank
- Truck Year
- 1979
- Truck Model
- K10
- Engine Size
- 350
Just joined and have a question I need help with. This really is a two part question. I have a 1979 K10 full time 4x4x with 342 gears. 10 bolt front and 12 bolt rear. The truck came with 700x15" tires when new but I now have 35x12.50s on it. I was wondering what my gear ratio is now? Second part of the question. It had a 350 with a turbo 350 in it and I was very pleased. The engine blocked cracked and we just finished a swap from a 1983 with a 350 and a 4 speed automatic that had lock outs. We changed the hubs also so I now have two wheel drive for the road. Problem is the 4 speed auto and my gear/tire combo just don't work. It won't shift into drive until about 50 mph and only shifts into overdrive if you are doing over 70. I know I need lower gears but how low?