My 49 1 ton would do 40 tops and sounded like the engine was going to fly out straight out of the hood. I bought a 3rd member from a 71 3/4 ton w/ auto and it has a 4.10 rear end. They are hard to find, and harder unless you know it is/was originally a 3/4 ton w/ and automatic. otherwise, you have to crack into it and count teeth.
Excited to get it back out on the road and see what switching from the 5.14 to the 4.10 will do. Everyone says it doesn't affect the low end too badly but improves the higher gears. Mine spent a good life working. In retirement, she's just gonna cruise to farmers markets and parades. Maybe the lumberyard on a fine sunny Saturday.
