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4.88`s and 35s ?

flyingxj said:
wow thanks i just wanted to get some posts in but i get people with suck everywere thanks again
Click to expand...

aww, you are just upset you dont have any friends

Untitled.jpg


i wonder why...
 
Dang it---back on topic
I run bfg at 35" size with 4.88 gears-NV3550 trans.YES I wheel in the woods.Uwharrie actualy.Great combo-hiway speeds at 75 mph is 3000 rpm's-hills have no effect up or down-I get 16-18 mpg on the hiway too.I think the 4.0 i have really likes to spin 2500 rpm and up-makes a good amount of power there.
 
souske said:
No problems with the acorn sized pinion?
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4.88's ain't the issue hive seen broken pinoins, carriers and ring gears on many diff d30 gears (3.73,4.10,4.56,4.88) and I've also seen 4.88.s hold up to 36" tires and severe abuse(one with stock carrier and lockrite other with arb) I guess its more of the luck of the draw
 
souske said:
No problems with the acorn sized pinion?
Click to expand...

i run 5.38's in a low pinion 44 and the internets told me i was dumb.

well ive broken A LOT of shafts and a detroit locker before i stripped my ring gear. and i stripped it on 35's when both tires were bound up real bad.

I now run 38's on the same axle. i still beat on it hard , but from experience i know what cause breakage and when i should let off.
 
Just wondering, I managed to pop ring gear teeth off on a 4.10 gearset in an open D30
So I am a little leery of R+P failures now.
 
souske said:
Just wondering, I managed to pop ring gear teeth off on a 4.10 gearset in an open D30
So I am a little leery of R+P failures now.
Click to expand...

open carriers tend to flex
stock dana30 housings tend to flex.

this leads to pinion deflection (when binding up or under throttle the pinion gear wants to push away from the ring gear)
 
that is why a 14 bolt (or similar axle) is badass. There is a third bearing on a snout at the tip of the pinion gear that greatly reduces deflection due to torque loading.

Sadly there just isn't space for something like that in smaller axles, or axles with a low hypoid offset. The larger the axle is or the higher the hypoid offset is, the more space there is available in the housing to design in a third pinion bearing.
 
kastein said:
that is why a 14 bolt (or similar axle) is badass. There is a third bearing on a snout at the tip of the pinion gear that greatly reduces deflection due to torque loading.

Sadly there just isn't space for something like that in smaller axles, or axles with a low hypoid offset. The larger the axle is or the higher the hypoid offset is, the more space there is available in the housing to design in a third pinion bearing.
Click to expand...

I always wondered about that and why Dana never did that. Then I saw this picture (14B left - 4.11, D60 right - 4.10)

IMG_3228.jpg


I'd imagine GM did it because the spacing between the inner/outer pinion bearings is next to nothing, while Dana has inches between the two providing sufficient support?
 
MoparManiac said:
I always wondered about that and why Dana never did that. Then I saw this picture (14B left - 4.11, D60 right - 4.10)

IMG_3228.jpg


I'd imagine GM did it because the spacing between the inner/outer pinion bearings is next to nothing, while Dana has inches between the two providing sufficient support?
Click to expand...
And then you didn't add any picture so you look like a fool. :looser:
 
MoparManiac said:
I always wondered about that and why Dana never did that. Then I saw this picture (14B left - 4.11, D60 right - 4.10)

IMG_3228.jpg


I'd imagine GM did it because the spacing between the inner/outer pinion bearings is next to nothing, while Dana has inches between the two providing sufficient support?
Click to expand...

this is not the picture you are looking for *hand wave*

apparently pirate4x4 doesn't allow hotlinking :roflmao:

You've got a good point, but I'd still rather see the bearings straddling the actual gear than both behind it.

edit: seemingly they do allow hotlinking. But their DNS issues aren't fixed yet, so unless you work around it or aren't experiencing the problems in the first place, you won't see the picture.
 
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