What's an inexpensive way to ensure your Powerstroke's transmission stays as cool as possible? Easy, this simple-to-install kit from DieselSite!
From 1999-2003, the Ford 7.3L Automatic Transmission (4R100) had an external cooler bypass tube that redirected transmission fluid from the pump output back to the return line of the transmission. The bypassing of the cooler was supposed to happen until the fluid reached operating temps. Unfortunately, these bypass tubes commonly fail preventing transmission fluid flow to the cooler. Another design flaw is that even when operating perfectly, the bypass never fully closes, meaning not all fluid is ever sent to the cooler, ever.
The result: transmission overheat. Many delete kits are available on the market that eliminates the bypass tube and the common failure. However, these kits do not address the restriction in the banjo bolt. If you look at the cut away photo of the banjo bolt, you can see the spring and check ball which restricts about 75% of the fluid flow to the cooler. The spring and check ball was designed to allow the proper function of the cooler bypass tube. Once the bypass tube is deleted, this check ball and spring are no longer needed.
From 1999-2003, the Ford 7.3L Automatic Transmission (4R100) had an external cooler bypass tube that redirected transmission fluid from the pump output back to the return line of the transmission. The bypassing of the cooler was supposed to happen until the fluid reached operating temps. Unfortunately, these bypass tubes commonly fail preventing transmission fluid flow to the cooler. Another design flaw is that even when operating perfectly, the bypass never fully closes, meaning not all fluid is ever sent to the cooler, ever.
The result: transmission overheat. Many delete kits are available on the market that eliminates the bypass tube and the common failure. However, these kits do not address the restriction in the banjo bolt. If you look at the cut away photo of the banjo bolt, you can see the spring and check ball which restricts about 75% of the fluid flow to the cooler. The spring and check ball was designed to allow the proper function of the cooler bypass tube. Once the bypass tube is deleted, this check ball and spring are no longer needed.
Specifications
- ManufacturerDieselSite
- MPNDSI:4RCDK | DSI:4RCDKVAN
FEATURES & BENEFITS:
- Works For Any 4R100 Model Ford Automatic Transmission, Gas or Diesel
- E-Series Kit Clears the Exhaust on the Front Most Return Port
IMPORTANT NOTE:
- Please choose the appropriate vehicle type when purchasing as they are NOT cross-compatible.
INSTALLATION NOTE:
- Simply remove the original banjo bolts from your transmission case, remove and discard the bypass tube, discard your original bolts, install your new DIESELSITE deletion bolts with provided crush washers, and reconnect your return lines. Make sure the o-ring provided is seated in the head appropriately before reconnecting your return line.
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DieselSite 4R100 Transmission Cooler Bypass Delete Kit 99-03 7.3L Ford Powerstroke
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