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  #1  
Old 09-20-2007, 10:15 PM
goat junkie goat junkie is offline
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Default will 342 gears fit on a 410 carrier?
got a 12 bolt in my 69 gto. want to change the gears to 342, or 355. will they fit this carrier? thanks, mike.

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  #2  
Old 09-20-2007, 10:21 PM
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GonicGM GonicGM is offline
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Probably not unless you have a ring gear spacer now or have a 3 series gear. The factory used a 2 3 and 4 series carrier, basically in the obvious range as stated. If your carrier casting is 30140 yes, 30174 no. I believe there is a 3.90 gearset made for a 4 series carrier.

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Old 09-20-2007, 10:39 PM
mikeb mikeb is offline
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Quote:
Originally Posted by GonicGM
Probably not unless you have a ring gear spacer now or have a 3 series gear. The factory used a 2 3 and 4 series carrier, basically in the obvious range as stated. If your carrier casting is 30140 yes, 30174 no. I believe there is a 3.90 gearset made for a 4 series carrier.
There is a "thin" 3.73 that is made for a 4 series carrier. Maybe also a 3.90, I haven't looked.

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Old 09-21-2007, 08:41 AM
guthriesmith guthriesmith is offline
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Quote:
Originally Posted by mikeb
There is a "thin" 3.73 that is made for a 4 series carrier. Maybe also a 3.90, I haven't looked.
This is what I did with my 12 bolt. I had put a 4-series spool in the rearend with 4.10 pro gears. After changing direction with what I planned on doing with the car, the best solution was to buy the 3.73 gears for a 4-series carrier.

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Old 11-02-2007, 10:45 PM
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Dan Linebarger Dan Linebarger is offline
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When I was told that I could not put 4:11's in place of my 3:23's without a carrier changeout, I went to: http://www.tomsdifferentials.com/
These guys know their rear-ends.

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Old 11-03-2007, 10:34 AM
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Overkillphil Overkillphil is offline
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Quote by Dan: "These guys know their rear-ends"

I think I saw them on "Queer eye for the straight guy"!

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Old 11-03-2007, 10:43 PM
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Dan Linebarger Dan Linebarger is offline
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Default Ha!
Quote:
Originally Posted by Overkillphil
Quote by Dan: "These guys know their rear-ends"

I think I saw them on "Queer eye for the straight guy"!
Good pun! OK-Phil, Ha!

Seriously what I meant to say was that when everyone else said I couldn't do it, Tom's had a spacer and saved me a fortune.

Dan

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  #8  
Old 11-04-2007, 08:59 PM
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GonicGM GonicGM is offline
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Quote:
Originally Posted by Dan Linebarger

Seriously what I meant to say was that when everyone else said I couldn't do it, Tom's had a spacer and saved me a fortune.

Dan
Spacers have been around forever and most people know about them, no secret there. Spacers are generally frowned upon in the trade. The ring gear bolts are in double shear and depending on the carrier, the width of the ring gear piloting diameter is marginal with a spacer to properly center the ring gear on the carrier.

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  #9  
Old 11-04-2007, 11:17 PM
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Dan Linebarger Dan Linebarger is offline
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Default Thanks
OK, I'll keep that in mind.

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