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Discussion Starter #1
this is my first post on this site, so forgove me if its not up to par. i am in the midst of building my 92 toyota pickup, i am almost done my sas and 5" suspention lift, next summer i plan on swapping in a 4.3L vortec chevy from a 1996 blazer and i would like to run 36's or 37's but i wont be getting the tires till after the swap i have 31's now with the 3.0L engine, i was wondering what gears would be reccomended for the bigger tires, i know that with the stock engine 5.29's are highly suggested but if im putting the 4.3 in it will have a bunch more power than the stock engine so would i beable to put in 4.88's and still be practical to run on and off road?

thanks
-sam-
 

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4.88 ,that's what i'm running with my 4.3 and 39.5's!
 

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and how are ther rpms going on the highway (60+mph) do you have a 5 speed or a automatic? how will the 4.88's be with my 3L 5speed and 31's? untill i get bigger tires and the 4.3 put in? thanks for the reply
 

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around 3225rpm
r&p x mph divided by actual tire size x 336 = rpm
 

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you could keep the 4.10s or 4.56s if you go with a dual case set-up.
 

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yes then you have to factor in how much percentage lower transfer case gears add
i think the 4.7 adds 22% ? if thats right that jumps the rpm to 3935
 

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Discussion Starter #7
the dual cases would be a good idea but my rear axle has 4.56's and the front axle i found for my swap had 4.10's so i need to gear them the same any ways, i think ill just go with 4.88's all around
 

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I dont' know what the 4.88's would be like with the 4.3 but they will be bearable with the 3.0L and 31's, 4runners come with that setup from the factory. I'm at about 2800rpm at 65mph in my 93 4runner.
 
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