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#619286 02/12/2010 7:56 PM
Joined: Dec 2008
Posts: 319
S
Shop Shark
Shop Shark
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Joined: Dec 2008
Posts: 319
Couldn't find anything in my search here.
I've been catalog shopping for rear end gears (Jegs, Summit) and now have questions about the venerable 12-bolt truck rear. Seems there are "3-series" and "4-series" carriers, each with a different range of gear ratios available. The overlap appears to be 3.73:1, with lower ratios for the 3-series and higher for the 4-series.

Questions:
How do you tell the difference, if you've got 3.73?
Are they interchangeable in the same housing?

It's a '65 C10, and it seems easier to swap the carrier than the whole assembly.

cm


If you can't fix it with a hammer and screwdriver, you need a bigger hammer.
1965 Chevy C10
Joined: Dec 2008
Posts: 319
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Bump...anybody?


If you can't fix it with a hammer and screwdriver, you need a bigger hammer.
1965 Chevy C10
Joined: Nov 2005
Posts: 6,100
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3B Offline
'Bolter
'Bolter
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Joined: Nov 2005
Posts: 6,100
Hy starfire4, yes the two carriers will fit into the same housing. I seem to remember when we changed ratios in those rear ends sometimes we had to use a spacer plate between the crown [ring] gear and the carrier, probably the spacer plate was duplicating the dimensions of the other carrier. I don't know how to tell the difference between the two carriers, but I would imagine they would have some kind of identifying number on them.

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Thanx, 3B.

cm


If you can't fix it with a hammer and screwdriver, you need a bigger hammer.
1965 Chevy C10

Moderated by  Phak1, Woogeroo 

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