Gearing

[Gdyup50]

Is there a way to know what gearing you have if you don't have a window sticker? Got my car tuned and it goes from 1st to 6th and never hits 2k rpms, thinking its tuned using wrong gearing.....thanks

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[K4fxd]

Probably 3.15. There is a tag on the rear it will show something like 3 L 15 or 3 L 55.

There is a code on the door tag. Find it and google as I don't have the codes memorized.

Your tuner can raise the part throttle shift points, it will kill MPG.

 

[Gdyup50]

Probably 3.15. There is a tag on the rear it will show something like 3 L 15 or 3 L 55.

There is a code on the door tag. Find it and google as I don't have the codes memorized.

Your tuner can raise the part throttle shift points, it will kill MPG.

Ya the tag on the door just says yy or something

 

[paulm1]

Ya the tag on the door just says yy or something

YY is 3.15

 

[Gdyup50]

YY is 3.15

Sweet thx

 

[Cobra Jet]

Is there a way to know what gearing you have if you don't have a window sticker? Got my car tuned and it goes from 1st to 6th and never hits 2k rpms, thinking its tuned using wrong gearing.....thanks

Here ya go, anything needed for rear axle deciphering and info. Scroll about 1/2 down and you'll find the VCL axle/differential codes for the later model Mustangs:
https://lmr.com/products/Mustang-7-5-8-8-Rear-End-Axle-Info

 

[K4fxd]

Here ya go, anything needed for rear axle deciphering and info.

It's missing the 3.15 ratio the 15 and up auto's got.

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