Jim's Speedometer World

Ford 11% Increase Speedometer Gear Ratio Adapter

Name: Ford 11% Increase Speedometer Gear Ratio Adapter
Brand: Jim's Speedometer World
SKU: Ford-AA11111
Price: 227.00 USD
Availability: InStock

$227.00 USD

~~$247.00 USD~~ $227.00 USD

SALE SOLD OUT

Compatibility: FORD, LINCOLN, MERCURY
New in box, includes plastic downsizer
Made in USA

CUSTOM FORD RATIO ADAPTER AVAILABLE HERE

Speedometer Gear Ratio Adapter for Ford Lincoln Mercury, 11% increase adapter

NOTE:
You must change your Ford type cable to a different ended GM type cable. One end will have a 7/8 by 18 thread for the transmission side and the other end should match the speedometer side of your existing setup.
( Some will have push-in ends, clip-on ends, or 5/8 by 18 thread ends. Match the cable end you need )

✅ Compatible with 7/8 by 18 thread speedometer cables.

✅ Includes Ford ferrule.

✅ All Ford ratio adapters include the white plastic downsizer.

✅ For use on the transmission/transfer case side.

NOTE:
Must reuse previous Ford driven gear, and previous Ford gear C-clip used during speed reading session for this adapter to read accurately.

❌ These adapters will not fit behind the speedometer cluster.

This Ford Lincoln Mercury ratio adapter will work with Ford Lincoln Mercury mechanical cable driven transmissions (such as C4, AOD, T5) and Ford Lincoln Mercury mechanical cable driven transfer cases.

❌ Will not work with speed sensors or electronic applications.

This ratio adapter will speed up your speedometer gear rotation by 11%.

Increasing your speedometer gauge reading.

More increase percentages are available in our shop!

If you need assistance calculating your percentage, send us a brief email with these clean speed readings to: jim@speedometer.world

(Straight cable, without any previous adapters in place)

The GPS displays:	But your Speedometer displays:
40 mph	??
50 mph	??
60 mph	??

We recommend acquiring these numbers with two people in the vehicle.

One person in the passenger seat with a GPS device/cellphone displaying current speed, who will alert the driver at 40mph, 50mph and 60mph.

The driver can then more accurately relay what their speedometer displays at those 3 intervals.

Be sure to give us these readings in this exact order, 40mph - 50mph - 60mph on the GPS versus what your Speedometer displays, to ensure the proper percentage.

Non-custom common increase, speed up adapter ratios we have available:

11% Speed up	AA11111	Ratio 1.1111
20% Speed up	AA12020	Ratio: 1.2020
28% Speed up	AA12844	Ratio: 1.2844
38% Speed up	AA13846	Ratio: 1.3846
44% Speed up	AA14400	Ratio: 1.4400
50% Speed up	AA15000	Ratio: 1.5000
61% Speed up	AA16154	Ratio: 1.6154
78% Speed up	AA17778	Ratio: 1.7778
100% Speed up	AA20000	Ratio: 2.0000

Non-custom common decrease, reducer / slow down ratios we have available:

10% Slow down	AA09000	Ratio 0.9000
17.6% Slow down	AA08241	Ratio: 0.8241
20% Slow down	AA08000	Ratio: 0.8000
26.7% Slow down	AA07333	Ratio: 0.7333
28.5% Slow down	AA07143	Ratio: 0.7143
37.5% Slow down	AA06250	Ratio: 0.6250
50% Slow down	AA05000	Ratio: 0.5000