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⚙️ Rebuild with confidence, drive with pride.
The USA Standard Gear ZK D44 Master Overhaul Kit is a comprehensive, precision-engineered rebuild solution for Dana 44 differentials with 30 spline axles. Featuring premium Koyo bearings and races, a complete shim kit, and all necessary hardware, this kit empowers professional-grade DIY installations backed by detailed instructions. Ideal for millennial managers who value quality, reliability, and the satisfaction of mastering their own vehicle maintenance.



| ASIN | B0078U8QY2 |
| Best Sellers Rank | #14,485 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Differential Assembly Kits |
| Brand | USA Standard Gear |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,722) |
| Date First Available | February 13, 2012 |
| Exterior | Machined |
| Item Weight | 5 pounds |
| Item model number | ZK D44 |
| Manufacturer | USA Standard Gear |
| Manufacturer Part Number | ZK D44 |
| Model | Master Overhaul Kit for Dana 44 Differential with 30 Spline |
| OEM Part Number | ZKD44 |
| Product Dimensions | 12 x 12 x 3 inches |
S**Y
Just what I needed.
Had all the parts I needed to rebuild my rear axle.
A**R
Five Stars
The customer service is excellent. Parts are good quality.
Y**R
Malicima
Muy malo la descripción no es la adecuada y no se puede ni devolver no lo recomiendo a nadie
R**D
Not a Koyo fan:(
Inspect your Koyo bearing races. Had a couple with defects that could be easily felt with finger. Quick return though. So that is appreciated. Get Timken instead.
R**E
Incomplete Kit for a 1989 Jeep Wagoneer Dana 44 front axle
Amazon says that this kit fits the 1989 Jeep Grand Wagoneer Dana 44 axles. I dropped off my axle, new gears, and this master kit to be installed. It DOES NOT come with a slinger washer for behind the pinion shaft and both of the inner axle seals were WRONG for the axle. Now I'm out additional money because they had to buy these items for the install and I get charged for it. That's not cool!! Either Amazon needs to take this vehicle off the list of autos it fits or USA Standard shouldn't say that it includes ALL items needed to rebuild the axle.
D**L
Returned a box of used parts!
I received a box of used parts which apparently someone returned after using the new parts. The package was re-boxed returned and eventually never inspected and sold to me.
D**S
Someone’s old parts
Received this kit today. Missing bearings all tapped together and greasy. Pinion race had been cut in half. Someone else’s used parts is what I got.
T**N
Does not fit Dana 44 30 spline
Bearings and bearing cups (races) are 1/8" larger than factory... Waited too long to instal, now outside of return window... Not as advertised!
S**N
great pack👌
Great pack everything as advertised.. plenty of shims.. Note: these carrier shims fit only on outer race, not under the bearing, and pinion depth shims fit only In the housing, not between the pinion head and bearing.. works for me and I would highly recommend this pack. all fits 97-06 jeep wrangler dana 44 30 spline.
Trustpilot
1 month ago
3 weeks ago