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04-23-2010, 12:25 AM
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#1 | |
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AF Newbie
Join Date: Apr 2010
Location: Edmonton
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Size of rear axel?? and stock gears???
i want to change to a 3:73 posi what would i need???
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04-23-2010, 08:37 AM
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#2 | |
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AF -Advisor
 Join Date: Feb 2004
Location: Chesterfield, Virginia
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Re: Size of rear axel?? and stock gears???
What kind of car? Year, trans, engine?
Jim |
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04-23-2010, 10:46 AM
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#3 | |
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AF Newbie
Thread starter
Join Date: Apr 2010
Location: Edmonton
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Re: Size of rear axel?? and stock gears???
Sorry lol i ended up making 2 posts by accident... its a 1981 pontiac parisienne 305ci TH350 10bolt rear
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04-23-2010, 01:14 PM
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#4 | |
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A990 racer
 Join Date: Mar 2002
Location: Chestertown, New York
Posts: 17,051
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Re: Size of rear axel?? and stock gears???
A ring and pinion set and a aftermarket posi unit available from several manufacturers.
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04-23-2010, 02:11 PM
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#5 | |
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AF Newbie
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Location: Edmonton
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Re: Size of rear axel?? and stock gears???
lol i know that much but whats the size of the rear end like 7.5, 8.5??? so i can order the correct parts... im thinking its a 10bolt 7.5" rear, same as late 70's early 80's camaro?? Its running at 2800RPM on the highway at 60MPH i want to get it down to like 1700-2000RPM at 60MPH, now by upgrading to the 3:73 or 4:11's will that improve my RPMS at 60mph or would they be higher RPM at 60MPH. also it does not have over drive just a plain old TH350 1,2,D... IF not 3:73 or 4:11's witch gears would help me out best?
Last edited by tman-420; 04-23-2010 at 03:43 PM. |
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04-23-2010, 08:13 PM
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#6 | |
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A990 racer
Join Date: Mar 2002
Location: Chestertown, New York
Posts: 17,051
Thanks: 26
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Re: Size of rear axel?? and stock gears???
First you need to know what gears are in there now, no? 2800 at 60 sounds like a pretty high numerical gear, you will need to get down to the very low 3's to see 1700-2000 rpm at 60 depending on tire size. As for the ring gear size, removing the cover and checking it is the only way I know how that car, MrPbody may help out with that issue.
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