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Early Bronco AX15 5-speed Manual Transmission Kit with New Transmission SKU: 7225N

Early Bronco AX15 5-speed Manual Transmission Kit with New Transmission

Early Bronco AX15 5-speed Manual Transmission Kit with New Transmission

AX15 Deluxe Kit with Brand New Transmission and Twin Stick For 73-77 Bronco J-Shift Dana 20
Purchase Early Bronco AX15 5-speed Manual Transmission Kit with New Transmission
$3,400.00 SKU: 7225N
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Year of Bronco:
Transfer Case Shifter (73-77 Bronco J-Shift requires Twin Stick):
Clutch Selection:

Product Overview:

The Aisin AX15 5-speed manual transmission is a top-shifting manual transmission with overdrive. This transmission is stout enough to handle the torque and horsepower of most V8 engines. No driveshaft modification is necessary when installing this transmission into a 66-77 Ford Bronco making the AX15 5-speed manual transmission an excellent choice for your early Bronco. 


The transmission fits great in the early Bronco, but is a bit larger than stock. Thereofore, we recommend a 1" body lift, though not always required, to make for a much simpler and smoother installation of this transmission.

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Full description

The Aisin AX15 5-speed manual transmission is a top-shifting manual transmission with overdrive. This transmission is stout enough to handle the torque and horsepower of most V8 engines. No driveshaft modification is necessary when installing this transmission into a 66-77 Ford Bronco making the AX15 5-speed manual transmission an excellent choice for your early Bronco. 

The transmission fits great in the early Bronco, but is a bit larger than stock. Thereofore, we recommend a 1" body lift, though not always required, to make for a much simpler and smoother installation of this transmission.

Early Bronco AX15 5-speed Manual Transmission Swap

This 66-77 Ford Bronco AX15 install kit includes a new Aisin AX15 5-speed transmission.

The Aisin AX15 5-speed manual transmission is a top-shifting, overdrive transmission with the shifter located in the rear section of the transmission. The transmission is able to handle the torque and horsepower of most V8's. This conversion requires zero driveshaft modifications. All of this makes it the perfect choice for swapping into your early Bronco. At WILD HORSES we use only brand new AX15 transmissions in our conversion kits, never rebuilt.

  • Available in this kit is our stainless steel twin stick transfer case shifter. The stock J-shift transfer case shifter is not compatible with the AX15 transmission and will require this upgrade. 

  • Additionally, we offer an upgraded Centerforce II clutch kit which includes a new clutch pressure plate, throwout bearing and pressure plate bolts. Unless you have recently upgraded the clutch in your Bronco, we highly recommend adding this clutch kit to your AX15 5-speed early Bronco conversion kit. There is no sense in upgrading to a new manual 5-speed transmission and leaving in an old, chattering clutch to use with it.

  • If your Bronco has a 10" clutch and flywheel setup (a rarity in early Broncos), you will need to upgrade to an 11" flywheel and add the clutch kit option to your order.

  • Like most transmission conversions a 1" body lift will allow for a much easier installation.
The AX15 5-speed manual overdrive transmission is fully synchronized in all gears. Gear ratios for the AX15 transmission are as follows:
  • First Gear: 3.83:1
  • Second Gear: 2.33:1
  • Third Gear: 1.44:1
  • Fourth Gear: 1.00:1
  • Fifth Gear (Overdrive): 0.79:1
Factory owner manuals call for 75W90 GL-3 or GL-4 Synthetic gear oil for the AX15 manual transmission.


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Instruction 1

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Instruction 2

Review Early Bronco AX15 5-speed Manual Transmission Kit with New Transmission

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