difference on 4.11 and 4.10

[bot0611]

Im looking for gears for my truck, 12 bolt/10 bolt but some places have for the rear 4.11 and others have 4.10 whats the difference there

And what about front, is 4.10 ok or search for 4.11

 

[Jason4x4]

same difference, you can have a certain % of diff, those are basically same.

 

[txfiremank5]

Like Jason said, you can run those two sets without issue. There isn't enough of a difference to cause any problems, and some actually came that way from the factory.

 

[bot0611]

Thanks guys, one more thing, i have to go with the regular gears right????not thick. i got 3.73 now

 

[jt512]

as far as the thick and regular gears go, i believe the thick gears are if you are runnining a 3.42 and down carrier. example: you have stock 3.08 and you want 4.11 you would buy the thick 4.11 if you kept the stock carrier from your 3.08. a good place to shop and check out stuff like that is randys ring and pinion, they list stuff so its pretty simple to understand.

 

[Mike D]

I read somewhere that the factory intentionally designs, for example, rear 4.11:1, front 4.10:1. The slight mismatch reduces drive trane noise ( probably the front ) between acceleration and deceleration.

 

[Chevy305]

won't make a difference. your tire wear and inflation make a bigger difference than those two ratios.

 

[6.2Blazer]

I read somewhere that the factory intentionally designs, for example, rear 4.11:1, front 4.10:1. The slight mismatch reduces drive trane noise ( probably the front ) between acceleration and deceleration.

Nope, it's simply because you can use a different design that has a different number of teeth on the ring vs. pinion gears. For example:
41 teeth on ring, 10 on pinion = 41/10 = 4.10
37 teeth on ring, 9 on pinion = 37/9 = 4.11
etc, etc...

 

[1979jimmy350]

your fine to run it. Even gears that are produced as 4.11 very from the factory. Some are 4.110 some are more like 4.119. This is caused by manufacturing variability in the gear cutting process. If you think of all the back lash in your entire drive train that a small difference like that will not make a difference.

 

[6.2Blazer]

your fine to run it. Even gears that are produced as 4.11 very from the factory. Some are 4.110 some are more like 4.119. This is caused by manufacturing variability in the gear cutting process. If you think of all the back lash in your entire drive train that a small difference like that will not make a difference.

I was going to put down a smart-aleck response but decided to change it. Still, this idea is just crazy.

I will agree there is some variability in gear sets as they come off the line, but it doesn't affect the ratio. The ratio only depends on the number of teeth on the ring gear vs. the pinion and those are very defined items and can only be whole numbers (24, 30, 41, etc...). Not like you can get an extra 1/100 of an extra gear tooth, or 41.05 teeth on the ring gear. That's the same as saying some 350 engines actually had 8.05 cylinders instead of just 8.

 

[1979jimmy350]

I was going to put down a smart-aleck response but decided to change it. Still, this idea is just crazy.

I will agree there is some variability in gear sets as they come off the line, but it doesn't affect the ratio. The ratio only depends on the number of teeth on the ring gear vs. the pinion and those are very defined items and can only be whole numbers (24, 30, 41, etc...). Not like you can get an extra 1/100 of an extra gear tooth, or 41.05 teeth on the ring gear. That's the same as saying some 350 engines actually had 8.05 cylinders instead of just 8.

As werid as it sounds you can end up with ratios like this, counting the teeth gives you the gear ratio that is correct. But things like tooth thickness and other gear dimensions can affect the ratio but only on a really small scale. I know this because over the summer i worked as an engineer at a plant that makes Ring and pinion gears for 14 bolt axles, and they do ratio verification and there are variability in the ratio

 

[Speedo]

As werid as it sounds you can end up with ratios like this, counting the teeth gives you the gear ratio that is correct. But things like tooth thickness and other gear dimensions can affect the ratio but only on a really small scale. I know this because over the summer i worked as an engineer at a plant that makes Ring and pinion gears for 14 bolt axles, and they do ratio verification and there are variability in the ratio

If that were true would it make a difference if it were a hunting, non-hunting or semi-nonhunting gear set?

Gus

 

[4X4HIGH]

Thanks guys, one more thing, i have to go with the regular gears right????not thick. i got 3.73 now

The 10 bolt has one carrier that does 2.56 only then another that does everything from 2.73-5.57 but the 12 bolt has 3 carrier breaks, 2.73-down, 3.07-3.42, then 3.73-4.56

 

[6.2Blazer]

As werid as it sounds you can end up with ratios like this, counting the teeth gives you the gear ratio that is correct. But things like tooth thickness and other gear dimensions can affect the ratio but only on a really small scale. I know this because over the summer i worked as an engineer at a plant that makes Ring and pinion gears for 14 bolt axles, and they do ratio verification and there are variability in the ratio

Okey-dokey