I currently have a T170 drive axle with a 6.50 ratio. I'm looking to swap it out for something with a higher ratio, preferably around a 4.10. My trans is a SM465 with a granny gear. I have a flat bed that is 91" wide. I have talked to several people locally and seem to be getting different answers but not from anybody that has actually done a swap.
1) Do I need to stay with drums in the back since I have drums up front? I was told I could use a proportioning valve and dial the back down a bit if they were discs.
2) Has anybody ever used a Dana 80? I've seen some with GAWR as high as 11,000 pounds
3) I plan on going from my current 20" dually wheels to 22.5 dually.
I want to try to accomplish this all while keeping the tires tucked under the bed. If anybody has any suggestions, I'll take them. If I'm completely off my rocker, I'll take that advice too.
Thanks
