Diff Gears
11-25-2013, 02:16 PM
#1
Newb Ford Owner
Thread Starter
Diff Gears
Hey guys
There are soo many posts about Fords and 33" and 35" tires and level kits and lift kits. But no one talks about gears. Am I to believe that the gears in the F150 are good from stock size to 35" ?? That seems hard to believe. Or do people just leave with the change in power / gas / mileage and everything?
If gears should be considered to be more than an after thought, what are some of the better upgrades out there?
Thanks
There are soo many posts about Fords and 33" and 35" tires and level kits and lift kits. But no one talks about gears. Am I to believe that the gears in the F150 are good from stock size to 35" ?? That seems hard to believe. Or do people just leave with the change in power / gas / mileage and everything?
If gears should be considered to be more than an after thought, what are some of the better upgrades out there?
Thanks
11-25-2013, 02:59 PM
#2
I think most people will say as a rule of thumb (*Just an opion not a scientific fact)
4.56 for 35's -37's
4.88 for 37's- 40's
Depending on what your truck came with you either have 3.55 or 3.73. If you have 3.73 you could run 35's and not have a huge power issue.
When I knew I was going to go to 37's I had a CAI, Power chip, and 4.88 gears installed before I put the new wheels on the truck.
4.56 for 35's -37's
4.88 for 37's- 40's
Depending on what your truck came with you either have 3.55 or 3.73. If you have 3.73 you could run 35's and not have a huge power issue.
When I knew I was going to go to 37's I had a CAI, Power chip, and 4.88 gears installed before I put the new wheels on the truck.
The following users liked this post:
xaerospace (11-26-2013)
11-25-2013, 03:56 PM
#3
XX
11-25-2013, 05:56 PM
#4
i have 3.55 gears and an open diff. i did experience power loss since the 6" lift and 35s, but unexpectedly the truck is performing fine on and offroad. Nonetheless, i do face some difficulties if its a high dune or deep dips. Now i have considered the gears and LS diff, and from what i have read in the forums 4.56 gears are satisfying with 35s and will regain the power loss.
11-25-2013, 06:03 PM
#5
Senior Member
Hey guys
There are soo many posts about Fords and 33" and 35" tires and level kits and lift kits. But no one talks about gears. Am I to believe that the gears in the F150 are good from stock size to 35" ?? That seems hard to believe. Or do people just leave with the change in power / gas / mileage and everything?
If gears should be considered to be more than an after thought, what are some of the better upgrades out there? Thanks
There are soo many posts about Fords and 33" and 35" tires and level kits and lift kits. But no one talks about gears. Am I to believe that the gears in the F150 are good from stock size to 35" ?? That seems hard to believe. Or do people just leave with the change in power / gas / mileage and everything?
If gears should be considered to be more than an after thought, what are some of the better upgrades out there? Thanks
11-25-2013, 06:56 PM
#6
Doing gears is kind of like doing 22" rims and tires. A chunk of change for the leisure trucker but necessary. Maybe even the complete axle is 4 the hearty. LOL
11-25-2013, 07:10 PM
#8
I you are thinking of 33-35" tires I wouldn't re-gear... The power loss is minimal... Plus if you don't tow heavy, drive like a bat outta hell, mud often ect. then there is no need.. I think the main reason people re-gear is to take some of the strain off the transmission...
11-26-2013, 03:01 AM
#9
I am wondering too. I have 37's on my 2007 FX4 and I have a set of 4.56's ready to be installed but some of my friends say I should get 4.88's. I just don't want the motor screaming at 75 mph on the freeway.
11-26-2013, 03:17 AM
#10
my 2005 Fx4 with 4.88's on 37x12.5R17's did great on the freeway. I cant remember what my RPMs wear at when I was going 75, but I want to say around 3k (im not sure). When I had to get up and go to pass people I felt sluggish even with the 4.88s. That issue could have been with the edge power chip being on a econ mode tho.