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  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2014 Specific V6 Tech

Help with gear ratio please...

  • Thread starter Thread starter dbpbandit
  • Start date Start date Oct 30, 2018
D

dbpbandit

New Member
Oct 30, 2018
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0
1
Oregon
Oct 30, 2018
#1
  • Oct 30, 2018
  • #1
Hi everyone!
I've got a 2010 Mustang V6 base (5 speed manual) and I'm trying to figure out my rear gear ratio so I can get a new tune. The one I have now is throwing off my speedometer by +10 MPH. I thought that it had a 2.73 but that's not the case. On my door sticker all I have under "AXLE" is a "BG" code and I can't seem to find that anywhere. Should be a BB or something else? I can't really crawl under the car and spin my wheels to rotate the drive shaft and count so I'd appreciate it if someone could tell me what the BG code means. Appreciate the help, thanks. -David
 

David Young

Active Member
Sep 16, 2012
182
18
38
Clinton, Tennessee
Oct 31, 2018
#2
  • Oct 31, 2018
  • #2
3.31
 
D

dbpbandit

New Member
Oct 30, 2018
4
0
1
Oregon
Oct 31, 2018
#3
  • Oct 31, 2018
  • #3
David Young said:
3.31
Click to expand...
Thank you!!!
 

GTVin

Member
Jan 15, 2019
52
4
18
San Diego
Sep 1, 2019
#4
  • Sep 1, 2019
  • #4
I'm wondering the same thing... have stock 94 GT with AOD stock wheels and tires . At 60mph I'm at 2000 rpms on highway in overdrive. Trying to figure out what gears I have??? Any help. Some say 308 or 321
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,975
1,620
153
nevada
Sep 2, 2019
#5
  • Sep 2, 2019
  • #5
Gtvin, Jack rear up , turn wheel one rev.while counting how many times the driveshaft moves.Or you could look for tag on rear end housing bolt.
 

David Young

Active Member
Sep 16, 2012
182
18
38
Clinton, Tennessee
Sep 2, 2019
#6
  • Sep 2, 2019
  • #6
My 2011 v6 6 speed automatic with 3.73 gears does 2,000 rpm at 60 mph. My 1991 F150 with a 5 speed manual and 3.08 gears does 2,000 rpm at 60 mph. If you don't have a gear ratio code on the door jam I guess you'll have to do what nickyb said to do
 
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