I have 20's with the 4.10's and no complaints here on that arrangement. PM me if you want the number for Brian Mize (AxisT6), he is the Gear Man.

 

I have the 3.23's and when I cruise to work I get the same mileage in drive as I do in overdrive.

So I can only say for myself I would atleast go with 4.11, but I'll probily get 4.33 or 4.56. If I get the same mileage I might as well have the burn out potential.

 

Does anyone know about drivetrain wear with 4.10s vs. 3.42?

 

My guess is that there isn't a factory code for the 3.90 gear, but I might be wrong. I'm not sure if the speedo can be corrected for the 3.90.

 

I had the 3.23's and now have 3.73's. I really like them a lot, but now I'm wishing I went with the 4.10's. Whats another 1/2 mpg? LOL. I used to get 19mpg and now get about 17 mpg. That was done on 200 miles of level freeway driving. At work i get about 14 mpg and my truck idles a lot with stop and go driving (farm truck). I'm running a 27" tire , so with a taller tire a 4.10 wouldn't be that bad. On the freeway at 70 mph, rpms are around 2300. As for drivetrain wear, it depends on how fast you intend to drive. If you drive a lot of freeway miles you might lean toward the 3.73, if its all city it won't matter all that much.

 

Also I have to say I didn't notice a huge difference from 3.73 to 4.10, I wish I woulda went with 4.30

 

It can be changed to any number imaginable......


I have the stock 3.42s and lovem with a 29" Toyo.. but I gots boosts from the STS.

Got to love the gears in the 80E. I can pull almost 100 in 2nd. 3rd is the same as the 60E but I've hit 140 every now and again...

If you plan on staying with that tire size I'd say 3.90 would give you good of both worlds..

 

Its simple. Imagine that your drive shaft turns 3 times to your tire turning one time. Its a 3 count like music. Or a 4 count is slower. Depends on your cars hp and torque and stall speed. Its math. Not a opinion exactly. If ya want a quarter mile car? Dont expect mpg on a Hwy. Its gonna rip for a 1/4 miles as fast as you can. So a lower gear does that's quick but runs out fast at top end. A higher gear will takea bit longer to climb so more than that 1/4 mile stretch of road but the topend will be a faster mph on the Hwy. But don't expect to cruse to the lake 200 miles away and not be reving the engine with a lower gear. These gears were designed many years ago for muscle cars with 14 to 15 inch tires and 3 speed or 4 speed transmissions. These gears have zero applications for say a 22" tire on a newer vehicle. I mean is this a street car? A truck? A mud truck? A 1/4 mile toy? Its all about the application not about the mpg on the freeway. If thats the goal than just buy a minivan and drive it. You're trying to figure out how a 10 speed bicycle works if your asking about gears. So start by deciding how you'd ride a 10 speed bycicle before you make a decision on what gears your gonna waist money on before you buy the wrong set.

 

Its simple. Imagine that your drive shaft turns 3 times to your tire turning one time. Its a 3 count like music. Or a 4 count is slower. Depends on your cars hp and torque and stall speed. Its math. Not a opinion exactly. If ya want a quarter mile car? Dont expect mpg on a Hwy. Its gonna rip for a 1/4 miles as fast as you can. So a lower gear does that's quick but runs out fast at top end. A higher gear will takea bit longer to climb so more than that 1/4 mile stretch of road but the topend will be a faster mph on the Hwy. But don't expect to cruse to the lake 200 miles away and not be reving the engine with a lower gear. These gears were designed many years ago for muscle cars with 14 to 15 inch tires and 3 speed or 4 speed transmissions. These gears have zero applications for say a 22" tire on a newer vehicle. I mean is this a street car? A truck? A mud truck? A 1/4 mile toy? Its all about the application not about the mpg on the freeway. If thats the goal than just buy a minivan and drive it. You're trying to figure out how a 10 speed bicycle works if your asking about gears. So start by deciding how you'd ride a 10 speed bycicle before you make a decision on what gears your gonna waist money on before you buy the wrong set.

 

Its simple. Imagine that your drive shaft turns 3 times to your tire turning one time. Its a 3 count like music. Or a 4 count is slower. Depends on your cars hp and torque and stall speed. Its math. Not a opinion exactly. If ya want a quarter mile car? Dont expect mpg on a Hwy. Its gonna rip for a 1/4 miles as fast as you can. So a lower gear does that's quick but runs out fast at top end. A higher gear will takea bit longer to climb so more than that 1/4 mile stretch of road but the topend will be a faster mph on the Hwy. But don't expect to cruse to the lake 200 miles away and not be reving the engine with a lower gear. These gears were designed many years ago for muscle cars with 14 to 15 inch tires and 3 speed or 4 speed transmissions. These gears have zero applications for say a 22" tire on a newer vehicle. I mean is this a street car? A truck? A mud truck? A 1/4 mile toy? Its all about the application not about the mpg on the freeway. If thats the goal than just buy a minivan and drive it. You're trying to figure out how a 10 speed bicycle works if your asking about gears. So start by deciding how you'd ride a 10 speed bycicle before you make a decision on what gears your gonna waist money on before you buy the wrong set.
May have said now those gears work backwards tho lol cause I'm typing and thinking at once haha