Speedometer to fast - Ford Mustang Forum
 
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post #1 of 7 (permalink) Old 07-22-2011 Thread Starter
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Speedometer to fast

So, just got the car a few weeks back with 4000 miles on it, and its a 6 spd. From the first drive I felt like the speed was reading about 12-15 mph to fast. I am considering getting 4.10 gears. i hear alot of people saying the gear really "wake up" the car, which i feel like the power is good already (i am used to 6 cylinders and maybe my 540i). but anyways, i read a few things that gears will mess up the speedo. I would hate to get 4.10 and turns out the previous owner already put them in....


2011 Mustang 5.0- BOSS Intake Manifold, Magnaflow Competition Catback, Magnaflow tru offroad X-pipe,C&L Intake, BAMA Tune, Motive 4.10 gears, 2" drop BMR Springs w/ Strange Engineering Struts, panhard bar, lower mounts, JLT oil seperator, [url]www.cibolaupholstery.com
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post #2 of 7 (permalink) Old 07-22-2011
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Well you could check with a gps or something like that to see if it is off.

If it is off they make calibration tools for that you can plug in and correct for the difference


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Edelbrock performer upper and Lower intake,GT40P Heads, Trick flow stage 1 cam, 1.7 rr, BBK Fenderwell CAI, 75mm TB, BBK Lontubes, O/R H Pipe, Flowmaster Catback, 373s, MM SBCs.
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post #3 of 7 (permalink) Old 07-22-2011 Thread Starter
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posted same thing on a local forum, the previous owner was on and said it had 4.10... odds, him responding to my post... too bad the car was totally done before he stripped it down to sell it. $5000 mark-up later i have it...

2011 Mustang 5.0- BOSS Intake Manifold, Magnaflow Competition Catback, Magnaflow tru offroad X-pipe,C&L Intake, BAMA Tune, Motive 4.10 gears, 2" drop BMR Springs w/ Strange Engineering Struts, panhard bar, lower mounts, JLT oil seperator, [url]www.cibolaupholstery.com
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post #4 of 7 (permalink) Old 07-22-2011
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This seems to be news to a lot of people, so I am going to type it in caps.

THERE IS NO NEED TO BUY A TUNER TO CORRECT FOR GEAR RATIO, THE FORD IDS WILL DO IT WITHOUT CHANGING ANY OTHER PARAMETERS OR MESSING WITH YOUR WARRANTY.

Fact.
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post #5 of 7 (permalink) Old 07-23-2011
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Quote:
Originally Posted by Thewrench View Post
This seems to be news to a lot of people, so I am going to type it in caps.

THERE IS NO NEED TO BUY A TUNER TO CORRECT FOR GEAR RATIO, THE FORD IDS WILL DO IT WITHOUT CHANGING ANY OTHER PARAMETERS OR MESSING WITH YOUR WARRANTY.

Fact.
But will it do gear ratios not offered from the factory, like 4.10? Also, they're going to charge you to do that. I've heard as much as $75. Plus, most people who do gears aren't planning on having that be their only mod, so they might as well take care of it with a tuner since they're likely to get one anyway.

2011 Kona Blue Mustang GT Premium Coupe - 401A, 6MT, Brembo, Comfort, Security, HIDs, Rear Camera
Steeda CAI, Magnaflow X-Pipe, Bama tune, Flowmaster Hushpower Axle-Backs, Ford Racing 4.10s, Barton Shifter & Bracket, JLT Oil Separator, BMR LCAs & Relocation Brackets, Steeda Adjustable UCA
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post #6 of 7 (permalink) Old 07-23-2011
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Quote:
Originally Posted by erod550 View Post
But will it do gear ratios not offered from the factory, like 4.10? Also, they're going to charge you to do that. I've heard as much as $75. Plus, most people who do gears aren't planning on having that be their only mod, so they might as well take care of it with a tuner since they're likely to get one anyway.
I'll pull it up Monday and see what the options are. Good point about wanting a tune done along with gears. If someone is intent on keeping it stock otherwise for warranty concerns, the gears and speedo adjust keep all that intact.
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post #7 of 7 (permalink) Old 07-23-2011 Thread Starter
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well... i bought the car not knowing it had 4.10. If I was some old lady and my speedometer was off I would not be happy if Ford told me sorry, the guy before you put different gears in the car so deal with it, I am sure they will calibrate it free, seems only natural

2011 Mustang 5.0- BOSS Intake Manifold, Magnaflow Competition Catback, Magnaflow tru offroad X-pipe,C&L Intake, BAMA Tune, Motive 4.10 gears, 2" drop BMR Springs w/ Strange Engineering Struts, panhard bar, lower mounts, JLT oil seperator, [url]www.cibolaupholstery.com
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