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What Gear Ratio Is This Axle?

Started by Guest_letrain_* , Mar 05 2004 06:39 AM

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#1 Guest_letrain_*

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Posted 05 March 2004 - 06:39 AM

i'm currently hunting junk yards for a new axle, now i know the front and rear axles have to be the same gear ratio. how do i know what thier gear ratio is? i dont think it says it on it...or does it? also i'm looking at many axles, not just the "stock bronco rear end" i found a full floating 1 ton rear end

and i'm currently searching for a solid one ton axle for the front, but i can't be sure their the same ratio if thier not out of the same truck. any help would be appreciated!

#2 Justshootme84

F-Series Commander

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Location:Palacios, TX
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Posted 05 March 2004 - 02:50 PM

Most axles will have a metal I.D. tag bolted to the inspection plate or differential carrier bolts with the ratio and axle type/# stamped on it. If the tag is broken or missing, the ratio should be stamped on one of the gears inside when you remove the cover. The shape of the cover and the number of bolts can help with ID, too. You don't need the exact same numerical ratio front and rear, just get them very close. Like 4.10 will work with 4.11, if you have different types of axles for the front and rear. THere's some helpful sites on the internet if you need more details. Try doing a search for Dana 60 or GM 14bolt, for example.

1984 Bronco XLT, 351W H.O., C-6 AT, Ford 9", SkyJ 6" lift, 35" tires on MT Classic rims, S&W Racecars 10-pt cage kit, custom "shaker" assembly.
1988 Bronco Custom, 302 EFI, C-6 AT, Ford 8.8". parting out
1986 Bronco Custom, 300I-6, NP435