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Author
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Topic: got my gear set, have a question
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 11:22 AM
   
I got my used gear set in the mail today, pinion gear is huge, ring gear is tiny wondering if i was sent some bogus partsgears are supposed to be for a 9" with a 3.55 ratio, but the ring gear only measures 8" in diameter at the back. That's not right is it?
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V8 Thumper
Gearhead Posts: 3936
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 12-01-2003 11:27 AM
Count the number of ring gear teeth, and divide by the number of pinion gear teeth. That will tell you the ratio. I just measured a 3.25 ring gear, and the machined flange surface (backside) measures 8 3/8" across, the gear side measures 9" to the outter most edges of the gears. Hope this helps  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 12:38 PM
Well i got the set used, and he had counted the teeth to tell me what ratio it was.the front of the gear doesn't quite measure 9" (more like 8 3/4) would the 3.55 gear just be an oddball?? most companys only make 3.50 (which is what made me suspicious) both have FoMoCo logo on them markings on ring gear U.S.A. WAC-421U-A 8-588 Shift No. 3
markings on pinion WAS 4610 A MX 1 [This message has been edited by Dubz (edited 12-01-2003).]
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grandestang
Gearhead Posts: 256
From: Lake Bluff, Illinois USA
Registered: Jan 2003
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posted 12-01-2003 04:17 PM
quote:
Originally posted by Dubz:
Well i got the set used, and he had counted the teeth to tell me what ratio it was.the front of the gear doesn't quite measure 9" (more like 8 3/4) would the 3.55 gear just be an oddball?? most companys only make 3.50 (which is what made me suspicious) both have FoMoCo logo on them markings on ring gear U.S.A. WAC-421U-A 8-588 Shift No. 3
markings on pinion WAS 4610 A MX 1 [This message has been edited by Dubz (edited 12-01-2003).]
Actually some gearsets in the Ford nine inch weren't quite 9 inches. The lower right caption discussing the rear end tags in this article http://www.fordmuscle.com/archives/2002/02/nineinch/index3.shtml confirms this, as the the 3.50 gear out of a 9 inch Bronco rear only measures 8 3/4. So you have nothing to worry about. Paul
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1970 Grande
H code 351W FMX
[This message has been edited by grandestang (edited 12-01-2003).]
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n2oMike
Gearhead Posts: 1707
From: Spencer, WV
Registered: Jan 2001
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posted 12-01-2003 06:30 PM
3.55 is a ratio used in the 8" and 8.8" rears. 3.50 is what was used in 9" rears. I'd double check the thing if it calculates out to 3.55It might be an 8.8 Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 06:36 PM
Richmond makes 3.55 gears for 9"
but these both have FoMoCo stamped in them
i thought it was odd as wellthe 8.8 doesn't have the front pinion support like the 9 does it? looks like a 9" pinion gear, and the two seem to mesh allright when i hold them in my hands
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 06:39 PM
not much i can do if it's the wrong gear anyway
ring gear 32 teeth
pinion gear 9 teethso that would be 3.56 gear instead of 3.55 anyone able to decypher the codes on them?
[This message has been edited by Dubz (edited 12-01-2003).]
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 06:47 PM
8.8 3.55 are
39 ring
11 pinionbizzare....really bizzare maybe these are worth something *idea*
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Dubz
Gearhead Posts: 906
From: Manitoba Canada
Registered: Oct 2002
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posted 12-01-2003 06:55 PM
WOOHOO, i figured it out!!!it's a 3.56 gear which from a couple sites is supposed to be 32/9 yippie, i got the right part
 and looks like i got it at a stellar deal, price i found was $556.50 http://www.drivetrainspecialists.com/products.asp?catid=25&cat=FORD+9 [This message has been edited by Dubz (edited 12-01-2003).]
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