9" rear end
5th Gear Member
Joined: Jun 2006
Posts: 4,089
From:
RE: 9" rear end
Unless you plan on pushing well over 400hp and racing, don't worry about upgrading to the 9 inch. Add a set of gears and a good rebuild of the 8" and don't look back. I have 3.80's in my '71, and it's plenty deep.
6th Gear Member
Joined: Oct 2006
Posts: 8,162
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RE: 9" rear end
if you shorten it hope you get it prefect fit if not your in for fun.why not just change the diff and axles in your 8 inch. im runing a 9 inch but i have a world 460 man o war i need it. a 8 inch can hold 500 or more hp if built right. are you swaping from a inline6 and cant find a 8. also theres a link in the faq shows every ford car and truck with a 9 inch and how wide they was.
Thread Starter
3rd Gear Member
Joined: Nov 2006
Posts: 702
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RE: 9" rear end
ORIGINAL: andrewmp6
if you shorten it hope you get it prefect fit if not your in for fun.why not just change the diff and axles in your 8 inch. im runing a 9 inch but i have a world 460 man o war i need it. a 8 inch can hold 500 or more hp if built right. are you swaping from a inline6 and cant find a 8. also theres a link in the faq shows every ford car and truck with a 9 inch and how wide they was.
if you shorten it hope you get it prefect fit if not your in for fun.why not just change the diff and axles in your 8 inch. im runing a 9 inch but i have a world 460 man o war i need it. a 8 inch can hold 500 or more hp if built right. are you swaping from a inline6 and cant find a 8. also theres a link in the faq shows every ford car and truck with a 9 inch and how wide they was.
5th Gear Member
Joined: Sep 2006
Posts: 2,266
From: Australia
RE: 9" rear end
try this calculator...only pick 4th gear for any gearbox (= 1:1 ratio so same as the C4 in 3rd)
will tell you the rev range when you do want to freeway it
personally i prefer the 3.5's but i do more open road than city.
http://www.corral.net/tech/gearcalc.html
will tell you the rev range when you do want to freeway it
personally i prefer the 3.5's but i do more open road than city.
http://www.corral.net/tech/gearcalc.html
6th Gear Member
Joined: Oct 2006
Posts: 8,162
From:
RE: 9" rear end
heres the link from the faq of what had a 9 inch stock http://www.ultrastang.com/Rearinfo.asp?Page_ID=1
4th Gear Member
Joined: Oct 2005
Posts: 1,195
RE: 9" rear end
question?????? if he spends 200 for the rear, and 600 to have it narrowed. no-one has mentioned anything regarding shortened axles. Does the 600 include the axles, bearings, re-seal, etc, etc, etc???