some gear ?

[myota]

I know there are plenty of gear questions, but i think these might not have been answered before(at least i can't find the answers)

how come the most popular gears are 4.88 and 5.29? are these rigs stronger than most?
why not use 5.13 for a good compromise?
i know that 5.71's have teeth that are too fine and will get trashed to soon.

also, when gearing is the goal a low complete ratio (transfer case, gear, tires, etc...), or is it most important to have the right ratio from the diff on back? i.e. someone using 4.88 or 4.56 on 35" tires with a dual transfer cases, or someone using 5.29 on 35" tires with stock case.

in my case i run 33s right now, and want to use 35's only when i'm off road. i guess i'm looking for something that'll swing both ways...

[Sean]

I've never heard of 5.13's for the toy axle. If you know of a manunfacturer please post it.

For off roading the overall gear ratio of the tranny,transfer and ring and pinion known as the final drive ratio is more important. The proper ratio in the diffs is more important for maintaining on road power by keeping the engine operating in the proper rpm range. Even with 4.10's and a doubler you will have a way lower final drive ratio then a single case with 5.29's.

If you want to run 33's on road then change the tires everytime you go offroad it would be fine to run 4.56s or 4.88s if you have lower then stock transfer case gears or a double transfer case setup. Unless you only wheel occasionally I can't see you wanting to change out four tires everytime you want to hit the dirt but maybe thats just me. I would go with the 4.88's as I'm sure they will be okay whether you run 33's or 35's on the street.

[kjmcdaniel]

Actual gear ratios are somewhat limited to the physical size of the gear it's self. The diametral(sp?) pitch of the gear teeth is determined by the diameter of the gear. Therefore the math involved in the determination of the gear ratio is limited to what ever will come out even given a certin diameter.

That is why everyone manufactures the same ratios, because any other ratio would, for example, result in a gear with 24 1/3 teeth, and that won't work.

[myota]

i put 5.13 gears, since in the gear faq it listed 5.13 as an option. are there more gear ratios listed in the faq that do not exist for toyota? why post them if they don't exist for a toy?

[kjmcdaniel]

That chart is not Toyota specific. It includes gear ratios for just about any vehicle.

The only gears that I know for sure that exist for Toyota trucks are:
4.11
4.27
4.56
4.88
5.29
5.71

Hope this helps.

[myota]

thanks

[Sean]

myota said:

i put 5.13 gears, since in the gear faq it listed 5.13 as an option. are there more gear ratios listed in the faq that do not exist for toyota? why post them if they don't exist for a toy?

The chart in the FAQ is a general gear calculator so it includes a lot of Dana ratios.