1st- 2.52:1
2nd- 1.52:1
3rd-1:1
Probably about 2.73-1.
Rear end gear ratio and tire diameter are required to make the calculation.
You would need a ring gear for an automatic.
Is there park and nurtural?
None, TH stands for turbo-hydromatic, hence th350 or 350 turbo.
80w90 gear oil works fine. so need for synthetic in your case.
Probably a turbo 350 trans. This is a three speed trans. The way for you to check is to look at the trans pan. look up a picture of a turbo 350 trans and compare it to your trans pan.
c4
3.08 makes a good ratio for economy. 3.55 for more power when towing.
Yes, there are 350 turbo transmissions that will bolt up to a 4x4.
Wouldn't matter on the highway. The high gear ratio is 1:1 on both. The 350 has a lower first gear, which would be better for getting started. Especially in a heavy vehicle.
i have a 92 silverado 1500. put 410 gear in and took out stock 308 gear. yours is probaly the same if you have 350 engine and 700 trans.