This is topic do i have 3:55 gears???? in forum Tech Talk at Northern California Ford Owners  .


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Posted by menlo pony (Member # 4301) on :
 
the guy that initially sold me the car said that the previous owner put 3:55s in there. but now that i took the diff. cover off. i saw ford on the ring and pinging. i know it could be ford racing but im not sure... this is what was around the ping (LZ E7TBB) does anyone know if they are stock or 3:55s???
 
Posted by BlueOvalRacing (Member # 1531) on :
 
Count the teeth on the ring gear and the pinion gear, then divide the ring gear teeth by the pinion teeth and you will know what ratio it is.
 
Posted by vpr_klr (Member # 3353) on :
 
there is a pretty easy way to figure this out. Jack the rear up, put the car in neutral, rotate the tire until the vavle stem is at 12'o clock(or 6, which ever you prefer), and rotate it one full rotation, noting the number of times the driveshaft makes a full rotation. i.e.-if you have 3.55 gears, the driveshaft will spin 3 and a half times when you spin the tire one full rotation. Good luck!
 
Posted by Cobra5.0JEEP (Member # 1482) on :
 
what do stock 95 GTs come with gear wise?
 
Posted by Fostang (Member # 3752) on :
 
quote:
Originally posted by Cobra5.0JEEP:
what do stock 95 GTs come with gear wise?
Anywhere from the 2. somethings to optional 3.27.
 
Posted by Cobra5.0JEEP (Member # 1482) on :
 
i think its 2.73s then, i don't think i have anything in the 3.
 
Posted by vpr_klr (Member # 3353) on :
 
auto: 3.27, manual: 2.73 or 3.27(more common). jsut use my method to find out! [Wink]
 
Posted by Black94 5.0 (Member # 655) on :
 
If it's an FMS gear set the part number will show on the top of the pinion gear...

The part number also designates the gear ratio
For example: M-4209-G355 =3.55 gears
 
Posted by 00s281sc368 (Member # 4284) on :
 
Just check your rpm!
If your car is not an auto, 3.55s should give you 2500rpm @80mph on 5th gear.
With 3.27 you are more closer to 90mph at 2500rpm.
 
Posted by 66 AC COBRA (Member # 904) on :
 
quote:
Originally posted by 00s281sc368:
Just check your rpm!
If your car is not an auto, 3.55s should give you 2500rpm @80mph on 5th gear.
With 3.27 you are more closer to 90mph at 2500rpm.
depending on tire height
 
Posted by Sicc98GT (Member # 1862) on :
 
how about 2,200 at 80 mph with 18's? [Confused]
 
Posted by 88DroptopGT (Member # 2535) on :
 
If you want some 3.55s I have a pair for sale. $80
[Cool]
Find out your tire/rim size and use a TireCalc or open up the rear end cover and look at the pinion to see if anything stamped on them. FMS has their logo stamped into their gears with their ratio size. My FMS Gears have "Ford" and "355" stamped into them.

[ May 04, 2004, 02:49 PM: Message edited by: 88DroptopGT ]
 




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