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  mustang II gear ratio?

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Author Topic:   mustang II gear ratio?
Bob Hopkins
Gearhead

Posts: 238
From: BRIDGEPORT NJ USA
Registered: Jan 2001

posted 08-08-2001 04:25 PM     Click Here to See the Profile for Bob Hopkins   Click Here to Email Bob Hopkins     Edit/Delete Message   Reply w/Quote
Iwas looking through a local boneyard for a 8" diff found a Mustang II Geia V-6 auto with a 8" with a 2.42 gearratio does this seem right???

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IIGood
Moderator

Posts: 2605
From: Arnold, MD, USA
Registered: Jun 99

posted 08-08-2001 05:12 PM     Click Here to See the Profile for IIGood   Click Here to Email IIGood     Edit/Delete Message   Reply w/Quote
Hmmm...off the top of my head, no.

I think the lowest gear ratio was 2.79 for the IIs. And I don't even think it was in an 8"...I think that came in the 6 3/4" diff.

Edit: CORRECTION

I just checked the tag decoder on MustangII.org, and it appears there was a 2.40 axle available in '75-'76. Here's what the axle tag info should look like:

WGF-S....2.40:1....8....C2....Removable

The first grouping would be the axle model. The second group is the ratio. The third number is the size of the differential. Fourth is the differential type, and the fifth is the carrier type.

So it does appear the II had a 2.40 rear. My apologies for making the first assumption. Learn something new everyday I guess?

Now, as to which model it went on, that I really don't know. My best guess would be the 4-cylinder models, maybe even the MPG models. Would make sense, since it's such a low ratio. But that's a guess.

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Frank S.----MCA Member 40390
'99 Mustang coupe
'77 Ghia--"II Good"
'76 Cobra--project

[This message has been edited by IIGood (edited 08-08-2001).]

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cobraii351
Journeyman

Posts: 46
From: Altoona, PA
Registered: Jun 2000

posted 08-08-2001 06:55 PM     Click Here to See the Profile for cobraii351   Click Here to Email cobraii351     Edit/Delete Message   Reply w/Quote
Wow, Thats one mean set of airplane gears. You would have to measure 0-60 with a calendar.

The only thing stranger than that I've found was a 2L47 9...... in a 78-79 cougar. Airplane gears with trac-lock!

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IIGood
Moderator

Posts: 2605
From: Arnold, MD, USA
Registered: Jun 99

posted 08-08-2001 07:49 PM     Click Here to See the Profile for IIGood   Click Here to Email IIGood     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by cobraii351:
You would have to measure 0-60 with a calendar.

LOL!!

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Frank S.----MCA Member 40390
'99 Mustang coupe
'77 Ghia--"II Good"
'76 Cobra--project

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The Cobraman
Gearhead

Posts: 154
From: Edmond, OK USA
Registered: Jun 99

posted 08-08-2001 10:49 PM     Click Here to See the Profile for The Cobraman   Click Here to Email The Cobraman     Edit/Delete Message   Reply w/Quote
2.79 gears came in the 8" rear. I've got II of 'em in case anybody wants to try Bonneville.

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77sleeper
Gearhead

Posts: 125
From: Mesa Arizona
Registered: Jun 2001

posted 08-09-2001 02:11 AM     Click Here to See the Profile for 77sleeper   Click Here to Email 77sleeper     Edit/Delete Message   Reply w/Quote
2.40 gears 195-70-13 tires 5500rpm

wow that is a theretical 158mph with a c-4

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mustangj
Gearhead

Posts: 259
From: fergus,ontario,canada
Registered: Mar 2001

posted 08-09-2001 11:28 PM     Click Here to See the Profile for mustangj   Click Here to Email mustangj     Edit/Delete Message   Reply w/Quote
My 78 Mach 1 v8 auto had 2.79 gears in it's 8". Now it has 3.55's with a never ever slip!
My 78 Ghia and 78 T-top #1 were both V6 cars and had 3.40's. My 74 6cyl Mach had 3.55's (big score) I bought it with new brakes and tires for $100.00. It was too nice to kill but, I was youger and stupider then. My 78 Ghia used a large part of it's parts.

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1978 Muscletang II t-top mach 1
1991 Lincoln mark 7
1997 Escort wagon type R
[email protected]

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Bob Hopkins
Gearhead

Posts: 238
From: BRIDGEPORT NJ USA
Registered: Jan 2001

posted 08-10-2001 01:44 PM     Click Here to See the Profile for Bob Hopkins   Click Here to Email Bob Hopkins     Edit/Delete Message   Reply w/Quote
So its possable,I was trying to read back side of tag front was too rusty to read,wonder how my 289Falcon would like those gearson the hwy with 225-70-14" tires?
might keep RPM's down

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LXXVICOBRA
Gearhead

Posts: 95
From: Central NY state
Registered: Jun 99

posted 08-10-2001 06:03 PM     Click Here to See the Profile for LXXVICOBRA   Click Here to Email LXXVICOBRA     Edit/Delete Message   Reply w/Quote

Yes.... might keep rpms down to the point it might stall, whenever you took you foot off the gas..lol.

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Maxwell_fax
Gearhead

Posts: 221
From: Port Royal, PA, USA
Registered: Nov 2000

posted 08-13-2001 04:06 AM     Click Here to See the Profile for Maxwell_fax   Click Here to Email Maxwell_fax     Edit/Delete Message   Reply w/Quote
I actually kinda enjoy my 2.75 gears... Granted burnuts kina suck, but I can still toast Camaro's (mainly because they are sitting and spinning while I am taking off) The other benefit of the airplane gears in combonation with the AOD I get eerily good fuel milage with damn near unlimited top end..

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stangiinet
Journeyman

Posts: 16
From: Redford, Michigan
Registered: Dec 2000

posted 08-13-2001 03:31 PM     Click Here to See the Profile for stangiinet   Click Here to Email stangiinet     Edit/Delete Message   Reply w/Quote
The 2.40:1 gear was available in 1975 and 1976 but was NOT an option on the Mustang II. It may have been available for the Pinto and/or Maverick but according to the MVMA specifications, 2.40 was not available for the II.

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Mustang II Network & Registry
www.mustangii.net

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Bob Hopkins
Gearhead

Posts: 238
From: BRIDGEPORT NJ USA
Registered: Jan 2001

posted 08-15-2001 03:57 PM     Click Here to See the Profile for Bob Hopkins   Click Here to Email Bob Hopkins     Edit/Delete Message   Reply w/Quote
Ok I was reading tag from back side, front was so rusty I could not read,what ratio do you think is in car.Was a coupe not a fastback a Giea,with V-6 amd auto,will have to back and look again. It was a 8" style removable axle but?????

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ROBROD37
Journeyman

Posts: 3
From: Baxter Springs, Kansas, USA
Registered: Sep 2001

posted 09-23-2001 07:11 AM     Click Here to See the Profile for ROBROD37   Click Here to Email ROBROD37     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Maxwell_fax:
I actually kinda enjoy my 2.75 gears... Granted burnuts kina suck, but I can still toast Camaro's (mainly because they are sitting and spinning while I am taking off) The other benefit of the airplane gears in combonation with the AOD I get eerily good fuel milage with damn near unlimited top end..


I would have to disagree about your gears and smoking camaro`s. I ran 4:11`s in my Mustang II and setup the rearend just right and mine just squatted and launched and hard also that was with a 3500 converter. Somthing on the cars you raced must have been way out of wack or had major horse power for a street driven car.

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