The Stupid Axle Questions Thread

[98chevy2500SS]

I may be misunderstanding your question: If you put in that 14 bolt with 4:10s and leave the front diff with 3:73s the 4WD won't work correctly, you need to have the front and rear diff the same gear ratio. I did hear you can have one hundredth off, for example 4:10 & 4:11 will work. If you are asking whether the gears will swap from one another, I think they can swap, if the previous owner swapped the gears out, it most likely had 3:73s, which is what most 14 bolts w/ 6 lugs came with.

 

[Trigger_guard]

Ok. I'll. Slow down. I tried to use an few words as possible. My 1/2 ton has 3.73s. I'm going to do a SAS and a 14 bolt swap at the same time. While I'm doing that I want to go to 4.11/4.10, however it seems that a 6-lug 14 bolt SF didn't come with a 4.10 option. I assume I can just swap the ring and pinion but I know some diffs have a "break over" point where the carrier is different i.e. 3.90 down vs 4.10 up on a Dana 44. So my question is can I put a 4.10 R&P in a factory 3.73 axle

 

[df2x4]

Ok. I'll. Slow down. I tried to use an few words as possible. My 1/2 ton has 3.73s. I'm going to do a SAS and a 14 bolt swap at the same time. While I'm doing that I want to go to 4.11/4.10, however it seems that a 6-lug 14 bolt SF didn't come with a 4.10 option. I assume I can just swap the ring and pinion but I know some diffs have a "break over" point where the carrier is different i.e. 3.90 down vs 4.10 up on a Dana 44. So my question is can I put a 4.10 R&P in a factory 3.73 axle

Yes, you can. Although I believe 4.10 (and even 4.56, although very rare) were an option in the six lug 14 bolt semi-floaters. There are a few up on car-part.com.

 

[Trigger_guard]

Thanks. Car-part doesn't give me an option for it. But I plan on doing a full rebuild before I put it in. So I'll just grab a $200 3.73 one

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[df2x4]

Thanks. Car-part doesn't give me an option for it. But I plan on doing a full rebuild before I put it in. So I'll just grab a $200 3.73 one

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Are you searching for 2500 or 3500 rear axles? The only way to get a 14 bolt semi-floater in a 1500 was to either have a 454SS or a 6.5 diesel, so I'd imagine the gearing options were probably more limited. If you search 2500 or 3500 axles you should get the option for a 14 bolt 9.5" in 4.10 and 4.56.

EDIT - 2500s are the one to search for, I just searched 3500s out of curiosity and it looks like all of those got the full floater 10.5"s.

 

[Trigger_guard]

Are you searching for 2500 or 3500 rear axles? The only way to get a 14 bolt semi-floater in a 1500 was to either have a 454SS or a 6.5 diesel, so I'd imagine the gearing options were probably more limited. If you search 2500 or 3500 axles you should get the option for a 14 bolt 9.5" in 4.10 and 4.56.

EDIT - 2500s are the one to search for, I just searched 3500s out of curiosity and it looks like all of those got the full floater 10.5"s.

Well. It turns out the problem was 4.10s weren't available in 98 I guess. I did a search for a 95 and found them. That being said. F44 1/2 tons were really common around here. And I can get a 1/2 ton 14 bolt 3.73 for less than half that of the 3/4ton 4.10

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[MSCustoms]

Are you searching for 2500 or 3500 rear axles? The only way to get a 14 bolt semi-floater in a 1500 was to either have a 454SS or a 6.5 diesel, so I'd imagine the gearing options were probably more limited. If you search 2500 or 3500 axles you should get the option for a 14 bolt 9.5" in 4.10 and 4.56.

EDIT - 2500s are the one to search for, I just searched 3500s out of curiosity and it looks like all of those got the full floater 10.5"s.

Not correct about the semi floaters. 1500's with RPO code F44 had the 14 bolt sf

 

[df2x4]

Not correct about the semi floaters. 1500's with RPO code F44 had the 14 bolt sf

True. I always forget about them because I've never seen one in person.

 

[Earthworm]

I have a 10 bolt rear on my 88 k1500, my question is the diff cover has no fill thread/hole. But It appears there is a “thread” with square spot for a socket on the diff housing it self. Is this my fill thread for the diff fluid?

 

[Jcauli82]

Yessir

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