JL JT Dana 35 and Dana 44 Pinion Bearing Failure Fix | Technical Deep Dive
Автор: East Coast Gear Supply
Загружено: 2026-02-21
Просмотров: 95
Описание:
If you own a JL or JT and run a Dana 35 or Dana 44 rear axle, this is a conversation you need to hear.
Beginning with the JL platform, Jeep moved away from the proven JK tapered roller outer pinion bearing and transitioned to a ball bearing style design. Over time, we have seen an increasing number of failures in real-world use, especially on vehicles running larger tires, lower gearing, towing loads, or extended highway miles.
In this video, we break down:
Why the factory JL / JT outer pinion ball bearing design fails
The engineering differences between ball bearings and tapered roller bearings
Why bearing separation matters
Why shim placement is critical
Why some conversion kits create new problems
How our design maintains factory geometry
Unlike other kits that place a shim on the outside of the bearing and change pinion bearing separation, our kit positions the shim beneath the bearing race. That means:
Factory bearing separation is maintained
Factory leverage loads are maintained
Stock crush sleeve can be used
Off-the-shelf solid spacer can be used
No machining required
No geometry compromise
This is not just a bearing swap. It is a geometry-correct conversion that respects the original engineering envelope of the axle while upgrading to a stronger tapered roller design.
Products Featured:
JL Dana 35 Rear 200mm Conversion Kit
https://eastcoastgearsupply.com/i-239...
JL Dana 44 Rear 220mm Conversion Kit
https://eastcoastgearsupply.com/i-239...
If you are regearing, replacing a failed outer pinion bearing, installing a solid spacer, or building a JL for long-term reliability, this upgrade should be considered.
At East Coast Gear Supply, we install what we sell. Our team of differential and axle experts brings you real-world shop knowledge to help you avoid mistakes, save time, and get the job done right. Whether you are upgrading for off-road performance, towing strength, or daily driving reliability, our videos give you the tools, tips, and confidence to tackle your drivetrain projects.
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