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One Part Number for a Complete Chrysler 9.25 Re Gear
The Yukon YGK2074 kit brings a 3.55 ratio ring and pinion set for the Chrysler 9.25 inch rear together with a 31 spline positraction carrier, 1.62 inch axle bearings and the master overhaul parts needed to rebuild the differential in one order. Gathering the gear set, traction device, bearings and small parts under one part number removes the guesswork from a re gear and means the job is not held up waiting for a missing shim or seal.
Key Features
- Complete re gear package for the Chrysler 9.25 inch rear differential
- 3.55 ring and pinion ratio
- 31 spline positraction carrier for improved traction under power
- Sized for 1.62 inch axle bearings
- Includes the Yukon master overhaul parts needed to rebuild the differential
- Gear sets produced with state of the art design and advanced heat treating
- Quality testing controls surface finish and structure to Yukon specification
- Single part number keeps the whole project matched, YGK2074
- Backed by the Yukon Gear and Axle warranty
- Exact manufacturer part number: YGK2074
Fitment
| Differential | Ratio | Carrier and Bearing Requirement |
|---|---|---|
| Chrysler 9.25 inch rear | 3.55 | 31 spline positraction carrier, 1.62 inch axle bearings |
Confirm the axle bearing journal size before ordering because Yukon supplies this ratio in separate kits for 1.62 inch, 1.705 inch and ZF pattern axles. Confirm the existing carrier spline count as well, since a 31 spline positraction unit will not accept axles of a different spline count.
Specifications
| Detail | Value |
|---|---|
| Brand | Yukon Gear & Axle |
| Manufacturer part number | YGK2074 |
| Product type | Ring and pinion install kit |
| Differential | Chrysler 9.25 inch rear |
| Ratio | 3.55 |
| Traction device | Positraction, 31 spline |
| Axle bearing size | 1.62 inch |
| Overhaul content | Yukon master overhaul parts |
| Barcode | 883584104698 |
| Warranty | Yukon Gear and Axle warranty |
What's Included
- Yukon YGK2074 3.55 ratio ring and pinion gear set for the Chrysler 9.25 inch rear
- 31 spline positraction carrier
- Yukon master overhaul kit bearings, seals, shims and small parts
- 1.62 inch axle bearings
About Yukon Gear & Axle
Yukon Gear and Axle produces ring and pinion sets, differentials, axle shafts and overhaul kits for street, tow and off road use. Its gear sets are designed and heat treated for repeatable tooth contact and surface finish, and its kit part numbers exist so a complete differential build can be ordered without assembling a parts list by hand.
FAQ
What is the YGK2074?It is a complete Chrysler 9.25 inch rear install kit containing a 3.55 ring and pinion set, a 31 spline positraction carrier, 1.62 inch axle bearings and Yukon master overhaul parts.
How do I confirm the axle bearing size?Measure the bearing journal on the axle shaft or check the bearing part number already fitted. This kit is built around 1.62 inch bearings, and separate kits cover 1.705 inch and ZF pattern axles.
Does the kit include a traction device?Yes. A 31 spline positraction carrier is part of the kit, so the differential gains limited slip behaviour during the same rebuild.
Will my existing axle shafts fit the new carrier?Only if they are 31 spline. Count the splines on an axle shaft before ordering because a different spline count will not engage the supplied carrier.
Why order a kit instead of separate parts?The kit keeps the gear set, carrier, bearings and small parts matched under one number, which avoids mismatched shims or a missing seal stopping the build.
Does a re gear need a break in period?Yes. New gears need a gentle initial period with varied speeds and no towing, followed by a fluid change, so the tooth surfaces bed in evenly.
Is special equipment needed to install it?Yes. Setting pinion depth, backlash and bearing preload needs measuring equipment and a press, so this is normally work for an experienced differential builder.
Does changing to 3.55 gears affect the speedometer?Changing the final drive ratio changes the speedometer calibration on most vehicles, so plan for a recalibration where the vehicle requires it.
What warranty applies?The kit is covered by the Yukon Gear and Axle warranty. Correct set up is required, so keep the installation records.
Installation Instructions
- Raise and support the vehicle safely, then drain the differential fluid and note its condition.
- Record the existing pinion depth shim, backlash and bearing preload readings before dismantling.
- Remove the axle shafts, the differential carrier and the pinion assembly.
- Clean the housing thoroughly and inspect it for cracks, wear and damaged threads.
- Press the new pinion bearing races and the carrier bearing races into the housing.
- Set pinion depth using the supplied shims, then install the pinion with the correct bearing preload.
- Fit the ring gear to the 31 spline positraction carrier and torque the ring gear fasteners to specification.
- Install the carrier, set backlash to specification and confirm carrier bearing preload.
- Check the tooth contact pattern with marking compound and correct pinion depth or backlash until the pattern is centred.
- Fit the 1.62 inch axle bearings and seals, reinstall the axle shafts and refit the cover with a new gasket or sealant.
- Fill with the fluid specification the differential requires, including friction modifier where the traction device calls for it.
- Complete a gentle break in with varied speeds and no towing, then change the fluid and recheck for leaks.
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