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Yukon Gear Dana 30 Disconnect Block-Off Plate
Yukon Gear part YA W39147 is a block-off plate that allows the vacuum-actuated front axle disconnect feature to be bypassed on Dana 30 differentials, fitting Jeep Cherokee (XJ), Comanche, Grand Wagoneer, and Wrangler (YJ) models. This listing is for the plate only.
Key Features
- Bypasses the factory vacuum-actuated disconnect feature
- Fits Dana 30 front differentials
- Plate only -- see note below for full kit options
Fitment
| Year | Make | Model |
|---|---|---|
| 1984-2001 | Jeep | Cherokee (XJ) |
| 1986-1992 | Jeep | Comanche |
| 1984-1993 | Jeep | Grand Wagoneer |
| 1987-1995 | Jeep | Wrangler (YJ) |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | YA W39147 |
| Application | Dana 30 front differential |
| Contents | Block-off plate only |
What's Included
- 1 disconnect block-off plate
About Yukon Gear
Yukon Gear & Axle manufactures differential, axle, and drivetrain components engineered for durable, precise-fit replacement and upgrade applications.
FAQ
What does this plate do?This plate bypasses the factory vacuum-actuated front axle disconnect feature on Dana 30 differentials.
Does this listing include a gasket or seals?No, this listing is for the plate only. Yukon offers full kits (YA W39147-KIT for 27-spline applications or YA W39147-KIT-30 for 30-spline applications) that include the block-off plate, gasket, and axle seals.
What vehicles does this plate fit?This plate fits Dana 30 front differentials used in Jeep Cherokee (XJ), Comanche, Grand Wagoneer, and Wrangler (YJ) models.
Is professional installation recommended?Yes. Installing this plate requires front axle disassembly and should be performed by a qualified technician.
Why would I delete the disconnect feature?The factory vacuum disconnect system can be a common failure point; bypassing it improves reliability for off-road and heavy-use applications.
Do I need a gasket with this plate?Yes, a gasket and axle seals are needed for a complete installation; consider the full kit versions if you need these components.
Will this affect my vehicle's fuel economy mode?Bypassing the disconnect means the front axle will always be engaged when 4WD is selected; confirm this tradeoff fits your use case.
Do I need to confirm fitment before ordering?Yes. Confirm your exact vehicle, model year, and spline count (27 vs 30) before ordering the correct kit or plate.
Installation Instructions
- Remove the front axle disconnect assembly components.
- Install the block-off plate with an appropriate gasket and seals.
- Reassemble the front axle and torque all fasteners to specification.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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