Gears. Need help
#1
Southern 4 Life
Thread Starter
Gears. Need help
The title basically says it all. I'm getting the truck regeared before I lift it. I've been reading a good bit on the internet, searched the forum, and I'm still undecided. I really wanted to go ford racing, but unfortunately they don't make the reverse cut for the front. Still can't make up my mind, to go with either 4:10/4:11 or 4:56. I'll be running 35s with the 4.6. From what I understand 4:10s will make it a stock ratio and 4:56 add a little pep. Just not sure if i can get away with the 4:56 with 33s till I lift it. I can't decide on a brand either, it seems like yukon is hit and miss. Some people love them, some have a hum. Any body that knows about them please help me out. Any help as always is much appreciated.
#2
Senior Member
I looked into this a while ago, I'm running 35's and I was going to do 4.56 Yukons with either a Detroit or Spartan locker.
One guy told me 4.56's with stock tires (I was thinking about downsizing to 265's for winter so I wanted to know if that was alright) would be fine. He brought up the point that the stock ratios for these trucks are 3.55 and 3.73 which is a 0.18 difference, 4.10 and 4.56 is a 0.46 difference, which is only 0.28 different from stock. He also added that the heavier trucks (superduty's) go all the way to 4.10's for towing and they are on small tires. He also said a lot of people have the bigger gears and smaller tires for racing.
One guy told me 4.56's with stock tires (I was thinking about downsizing to 265's for winter so I wanted to know if that was alright) would be fine. He brought up the point that the stock ratios for these trucks are 3.55 and 3.73 which is a 0.18 difference, 4.10 and 4.56 is a 0.46 difference, which is only 0.28 different from stock. He also added that the heavier trucks (superduty's) go all the way to 4.10's for towing and they are on small tires. He also said a lot of people have the bigger gears and smaller tires for racing.
#3
Hooligan
Maybe this will help? http://www.grimmjeeper.com/gears.html
Assuming a 4R70 and 70MPH:
Assuming a 4R70 and 70MPH:
- 33 inch tires, 4.10 diffs, 2046 RPM
- 33 inch tires, 4.10 diffs, 2275 RPM
- 35 inch tires, 4.56 diffs, 1929 RPM
- 35 inch tires, 4.56 diffs, 2145 RPM
Last edited by UtahGuy; 11-24-2015 at 05:22 AM.
#4
Senior Member
The title basically says it all. I'm getting the truck regeared before I lift it. I've been reading a good bit on the internet, searched the forum, and I'm still undecided. I really wanted to go ford racing, but unfortunately they don't make the reverse cut for the front. Still can't make up my mind, to go with either 4:10/4:11 or 4:56. I'll be running 35s with the 4.6. From what I understand 4:10s will make it a stock ratio and 4:56 add a little pep. Just not sure if i can get away with the 4:56 with 33s till I lift it. I can't decide on a brand either, it seems like yukon is hit and miss. Some people love them, some have a hum. Any body that knows about them please help me out. Any help as always is much appreciated.