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differential

Forum: C3 Engines, Driveline and Handling

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differential

Posted: 1/21/06 7:44pmMessage 1 of 11
J
JacksL71
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sussex, NJ - USA
Joined: 11/15/2002
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Vette(s): 1969 L71 riverside gold convertible on frame restoration numbers matching motor 4:11 factory rear 4speed with hooker side pipes

what is the difference from a 3 series carrier to a 4 series carrier

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differential

Posted: 1/21/06 9:47pmMessage 2 of 11
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Adams' Apple
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differential

Posted: 1/21/06 11:09pmMessage 3 of 11
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Big Fish
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I believe one will carry the higher gear ratios and the other will carry the lower gear ratios. I don't know which is which and where the dividing line is, I'll try to find out and post here...
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differential

Posted: 1/21/06 11:41pmMessage 4 of 11
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Big Fish
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Found something. 4 series are made to carry the 4:11 and 4:33 gear sets, 3:73 and down use the series 3 carrier. Some gear manufacturers do make thicker gears or spacers so 4:11 or 4:33 gears will fit a 3 series carrier.
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differential

Posted: 1/22/06 5:48amMessage 5 of 11
J
JacksL71
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sussex, NJ - USA
Joined: 11/15/2002
Posts: 299
Vette(s): 1969 L71 riverside gold convertible on frame restoration numbers matching motor 4:11 factory rear 4speed with hooker side pipes
thanks bigfish.Guess I have a 4 since I have a 4:11
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differential

Posted: 1/22/06 6:38amMessage 6 of 11
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lukesvette
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Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
So my desire to put 3.90s in the car isn't possible with either carrier?? LukesVette38739.2769097222

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differential

Posted: 1/22/06 6:38amMessage 7 of 11
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Big Fish
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[QUOTE=JacksL71]thanks bigfish.Guess I have a 4 since I have a 4:11[/QUOTE]

Jack, there's a good chance you do, but you could also have the special thick gears or gear spacers, you would need to get inside to know for sure.

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differential

Posted: 1/22/06 7:07amMessage 8 of 11
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Big Fish
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[QUOTE=LukesVette]So my desire to put 3.90s in the car isn't possible with either carrier?? [/QUOTE]

Luke, it looks like the 3:90 gear set will be okay with the series 3 carrier.

http://www.tomsdifferentials.com/cat15.htm

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differential

Posted: 1/22/06 7:21amMessage 9 of 11
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lukesvette
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HOWELL, NJ - USA
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Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Whew!! Thanks big fish!!

Now I just have to find a reputable shop in NJ! I've had estimates anywhwere from $500 to $1200 including labor. Both reputable...confusing - I guess rthey should itemize parts and labor for me

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differential

Posted: 1/22/06 8:49amMessage 10 of 11
J
JacksL71
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sussex, NJ - USA
Joined: 11/15/2002
Posts: 299
Vette(s): 1969 L71 riverside gold convertible on frame restoration numbers matching motor 4:11 factory rear 4speed with hooker side pipes
well I happen to have the rear right in front of me. I dropped it yesterday. Wouldn't know what to look for to see if had special thick gears,or spacers. Was one heck of a job getting to the upper bolts on the rear, the rest of the removal was fairly easy. The build sheet only makes mention of positraction axle 4:11RA. At least Now I've got some knowledge of the 3 and 4 carrier lingo. Oh yeah, Adams' apple your right the difference is 1. Thanks again big fish.
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