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Tannercox January 20th, 2019 11:02 AM

Axle swap
 
Do you have to swap front differential when changing rear axle from 3:42 to 3:73?

oilcanhenry January 21st, 2019 11:44 AM


Originally Posted by Tannercox (Post 369420)
Do you have to swap front differential when changing rear axle from 3:42 to 3:73?

On a four wheldrive vehicle, yes the axle ratios have to be the same.

PartRite February 25th, 2019 3:31 PM

Like oilcanhenry said, Yes if you change the rear diff ratio you have to change the front differential ratio as well. If you don't you will blow up your transfer case when its put in to 4wd.

therewolf February 28th, 2019 7:10 AM


Originally Posted by oilcanhenry (Post 369482)
On a four wheldrive vehicle, yes the axle ratios have to be the same.

THIS.

Also, that's a fairly subtle change, most folks going to the trouble and expense of changing the axle ratios
generally jump a gear, like when I did mine. I went from 410 gears, which is a fine power combo, to the
342s, for increased gas economy.
Nothing wrong with it, it's just a lot of cost and trouble, to go one ratio up. Will you be doing much highway driving at all?


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