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post #1 of (permalink) Old 09-29-2003, 07:18 PM
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Running gear, 10 bolt front and 14 bolt rear

I recently bought some 3/4 ton running gear for my 72 GMC.

My dilemma, I bought a GM 10 bolt front (3/4 ton) and a corp. 14 rear. I want to run 36's but the gears in my axles are 3.73's.

What is the carrier split on the 14 and 10 bolt axles? I would like to install 4.10 or 4.56 gears but I do not know the cut-off for a new carrier being needed. I know with a Dana 44 I would need a new carrier to install 4.10 if it had 3.73 gears before. I know the cut-off for a dana 60, but not my current axles (10 & 14 bolt). Could somebody please help me.

I feel confident that I can install gears myself beings I will have help from my dad if I can't figure it out on my own.
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post #2 of (permalink) Old 09-29-2003, 08:00 PM
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Re: Running gear, 10 bolt front and 14 bolt rear

For the 14 bolt, there are two carriers. 3.73 only and 4.10 up. They never put anything taller than 3.73 gears in it. I don't know if they still do or not but they used to make a "thick" ring gear to work with the 3.73 carrier.

For 10 bolts the split is between 3.73 and 4.10 also. The 3-series carrier works from 2.73-3.73 and the 4-series carrier works from 4.10-5.13. However, just like the 14bolt you can get "thick" ring gears to go with the 3-series carrier.
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