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Old 07-11-2012, 05:07 PM
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Change gears in Ford 9 inch

Hey guys, after 3 years of sitting (job loss)I am looking to put different gears in my rear end and need advise. I have a 67 Camaro with a Ford 9 inch full racing spindle and 373 gears. The back tires are P295/50/15. Motor is 327 with 60 over and the trans is turbo 400 2500 stall. I would like to replace the racing spindle also. Remarks comments are all welcome,

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Old 07-11-2012, 05:16 PM
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We need to know your goal, racing, street or both. What are you looking for by changing it?
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Old 07-11-2012, 05:56 PM
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Stickerbush;

Welcome to Hotrodders.com

I edited the thread title. We dont use any form of HELP in thread titles.

Please place some proper information in the thread title. That is better for the membership and the search function on the site
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Old 07-11-2012, 08:00 PM
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ford 9 inch

Yea my bad, thought about that after I posted, need it to be more highway freindly.. right now with 373's it runs about 45mph @ 2800 RPM'S, Need to be able to run down the interstate, no racing, but something that when I put my foot down smoke the tires, yet be able to run on highway.
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Old 07-11-2012, 09:31 PM
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Quote:
Originally Posted by stickerbush1970 View Post
Yea my bad, thought about that after I posted, need it to be more highway freindly.. right now with 373's it runs about 45mph @ 2800 RPM'S, Need to be able to run down the interstate, no racing, but something that when I put my foot down smoke the tires, yet be able to run on highway.

325 ratio works pretty well.
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Old 07-11-2012, 10:15 PM
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ford 9

Should I keep the racing spindle, posi or what
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Old 07-11-2012, 11:06 PM
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I'm assuming your speaking of a spool. If your main concern is Highway driving you might think about putting a Yukon or Duragrip clutched posi in it.
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Old 07-12-2012, 06:13 AM
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The Yukon Dura Grip would be a good choice. I also agree with the 3.25 gear ratio. Be sure to get a quality installation kit too.
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Old 07-12-2012, 07:52 AM
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Your tach or speedo is also off.
2800 RPM with 3.73 and a 26" tire is 58MPH.
With a 3.25 gear, 2800 is 67MPH.
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Old 07-12-2012, 08:41 AM
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Calculators
Use this to check it.
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Old 07-12-2012, 09:13 AM
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Yes, it could be off, no speedo in far. I could be wrong on gear too, just going off what I was told. So 3 more questions 1. How do I tell if tack is off? 2 how do I find there gear ratio? 3 recomendations for purchasing what I need?
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Old 07-12-2012, 11:13 AM
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You can hook up another tach from a diagnostic machine and see if they match.

Gear ratio will be on the tag if it's still there and hasn't been changed. The best way is to remove the chunk and count the teeth on the ring gear and pinion gear. Divide the number on the ring gear by the number on the pinion gear.

Contact Jim at www.jdrace.com or call Bruce at Randy's Ring & Pinion ext 5517 for parts. They will get you exactly what you need.
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Old 07-12-2012, 01:37 PM
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I hadn't thought of it before, but prostreet6t9 may also be a Yukon dealer. He might be able to get you everything you need.
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Old 07-12-2012, 05:06 PM
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yes I am a Yukon dealer among many others. You could always remove the pinion support. Mark the ring gear and count the teeth. Divide the pinion teeth as BGH suggested. Just dont loose the pinion shim and make sure it goes back if you put it back together.
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Old 07-12-2012, 05:24 PM
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First off I lost my job in 09 making 45,000 a year. during those three years off I went to school and obtained a Microsoft Cerified System Engineer degree which landed me a job @ 75k a year. So yea new read end, gonna need new rubber, and go **** yourself.
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