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Can you run 4.10's rear, and 373's front

Old Apr 23, 2009 | 12:10 AM
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Can you run 4.10's rear, and 373's front

Well I have a chance to get a new rear at a really good price locally. The issue is that the rear has 4.10 gears. My truck has 373's. Would I be able to run 373's in the front, and 4.10's in the rear. Would that have any issues at all?
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Old Apr 23, 2009 | 12:27 AM
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I don't think you could use 4wd without breaking stuff.
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Old Apr 23, 2009 | 12:49 AM
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Noooooooooooooooooooooooooooooooooooooo..........
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Old Apr 23, 2009 | 12:54 AM
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Your playing a joke right?
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Old Apr 23, 2009 | 01:55 AM
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yea definelty not. you would have the axles fighting each other tryin to do different revolutions. my buddy had this happen on an 04 hemi.. he blew the rear diff and went to an auto wrecker and picked up a used differential that the yard owner insisted had a 3.92 gear ratio.. so we installed it and never used four wheel drive until it came to sell the truck, we quickly found out that it didnt work so well when it was locked in 4x4 the tires were spinning at different speedsl, took the diff cover off.. stamped on the gears was 3:55 lol lesson learned..... hope this helps haha
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Old Apr 23, 2009 | 06:23 AM
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you ever ride a bull????????
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Old Apr 23, 2009 | 07:47 AM
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Can do it, but would need a good stagger in tire size fron to rear.
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Old Apr 23, 2009 | 07:54 AM
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Talking

I think he just embarrassed the whole SAC club!
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Old Apr 23, 2009 | 09:39 AM
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Dont do it!!!
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Old Apr 23, 2009 | 09:56 AM
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It'll work just fine,










if you run a tire on the rear that is 4.10/3.73 the diameter of the front tires.

A set of 35 inch tires for the rear and some 32s for the front wouldn't quite work, but would be close though and give that rakish look that's so popular.

BTW, my 1964 Power Wagon came with 4.10s in the rear, and 4.09s in the front. The idea was to put the driveline in slight tension when in 4x4.
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Old Apr 23, 2009 | 12:33 PM
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Do you want 4:10 gears? I'm assuming you do with 37s.

You could always pay to get the front swapped to 4:10

I wouldn't run the 3.73s in front unless you don't need 4wd until you can get them swapped.

4.10s would definitely be nice with 37s
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Old Apr 23, 2009 | 01:32 PM
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That would be the best way to turn a QC into a Megacab.
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Old Apr 23, 2009 | 03:14 PM
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Years of running 4WD, mechanics say that the two axles will compete with each other and eventually burn one of them out if not both. Remember, if you change tires to even things out, better have two spares or you're in competion again with axles. Not a very good idea unless you want to never use the front drive anymore. Then you're back to a 2WD. Seems like a lot of money wasted.
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Old Apr 23, 2009 | 04:49 PM
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Originally Posted by WhozNxtLS1
Well I have a chance to get a new rear at a really good price locally. The issue is that the rear has 4.10 gears. My truck has 373's. Would I be able to run 373's in the front, and 4.10's in the rear. Would that have any issues at all?

If you mean temporary and staying in 2wd only, yes. I'd pull the front drive shaft in the meanwhile as to not accidentally/forgetfully engage 4wd.


If you mean forever and trying to utilize 4wd, no. You will hear bad bad noises. Feel bad bad things. And have bad bad trouble.
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Old Apr 23, 2009 | 09:19 PM
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my buddy did this on his blazer he forgot about it and the thing was like bucking bronco.

update: weeks later he needed a t case
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