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10-07-2008, 02:26 PM
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#1 |
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Registered User
Join Date: Apr 2005
Location: Austin, TX
Posts: 1,223
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which rear could this be?
Found an ad for a complete '78 Chevy truck rear end that supposedly has 3.55 gears. I've looked at the aftermarket gear makers and none of them have 3.55 for 10-bolt, 12-bolt or 14-bolt Chevy truck rear end housings. Was 3.55 a factory gear? What would be the most common housing it is in? What is the likelyhood it would have a posi carrier?
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- Greg |
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10-07-2008, 04:29 PM
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#2 |
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: which rear could this be?
3.55 wasn't a factory gear ratio, if that is what you are asking about. On a 12bolt it is 3.42 and down and above 3.42 for the split. I have no idea what the 3.55 would fit, but I would assume it is has a spacer it would be for the 3.42 down and if not it would be 3.42 up.
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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10-07-2008, 04:45 PM
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#3 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: which rear could this be?
If they really are 3.55 gears, it is probably a Ford rearend.
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10-07-2008, 08:09 PM
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#4 |
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Registered User
Join Date: Apr 2005
Location: Austin, TX
Posts: 1,223
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Re: which rear could this be?
Well I sent the guy an email and tried calling the phone number posted in the ad. No response yet.
I did some more research and found that a 3.55 gear is common for both a 8.2" 10-bolt and a car 12-bolt. If this turns out to be a car 12-bolt, I'm definately snagging it. And yes, this is a common ratio for Ford 8.8" and Mopar 8.75" too.
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- Greg |
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