Yukon Gear Rear 4340 Chromoly Axle Kit Jeep JL Dana 35 29 Spline 32.3in Long
If you own a Jeep Wrangler JL Sport, Sport S or Sahara with the Dana 35 rear and you are running bigger tires, a locker, or you just heard a bang and lost drive on one side, the rear axle shafts are the weak link you are probably searching about. Yukon YA WD35JL-K is a one-side rear shaft kit for the JL Dana 35 (the 200 mm ring gear axle, often called the M200): a 29 spline, 32.3 inch long shaft made from 4340 chromoly, delivered with the bearing, seal, retainer, wheel studs and ABS tone ring already in the box.
In a semi-float rear axle like the Dana 35, each shaft does two jobs at once. The splined inner end turns with the side gear in the differential, and the flanged outer end carries the wheel and holds up the weight of the Jeep through the axle bearing pressed near the flange. That means the shaft is loaded in twisting from the engine and in bending from every rock and pothole. Factory shafts are built for stock tire sizes. Once you add 35 inch tires, a locker that removes the open differential's slip, or a lower gear ratio, the shaft sees more torque than it was sized for. Yukon builds this one from 4340 chromoly with cold rolled splines and induction heat treating, which is the usual recipe for a shaft that twists before it snaps instead of breaking clean.
Because the shaft is drilled for both 5 x 5 in and 5 x 5.5 in bolt patterns, you can keep factory JL wheels or move to a 5 x 5.5 wheel later without changing shafts again. The same part is listed for either side, so a full rear upgrade means ordering two kits.
Jack up the rear and spin each wheel by hand. Watch the flange edge against a fixed point; visible runout points to a bent shaft. Grab the tire top and bottom and rock it; clunking play at the hub is a worn bearing. If the Jeep will not move, pull the cover: a broken shaft usually leaves a stub in the side gear. Our Dana 35 rear axle problems guide covers what else to check while you are in there, and chromoly vs stock axle shafts explains when the upgrade is worth the money.
Yukon's fitment table lists this kit for 2018-2019 Jeep Wrangler JL Sport, Sport S, Unlimited Sport, Unlimited Sport S and Unlimited Sahara with the Dana 35 200 mm rear. Two honest cautions. First, not every Sport or Sahara has a Dana 35: Revolution Gear notes these trims came with either the Dana 35 or a Dana 44 rear, and every Rubicon uses the Dana 44, which takes a different shaft. Second, Yukon's table stops at 2019, so if your JL is a 2020 or newer, read the axle tag or send us your year and VIN before ordering and we will confirm the shaft. Compare Dana 35 vs Dana 44 if you are unsure which axle you have. Other axle and driveline parts are in our hard parts category.
| Brand | Yukon Gear & Axle |
| Part number | YA WD35JL-K |
| Fits | Yukon Gear Rear 4340 Chromoly Axle Kit Jeep JL Dana 35 29 Spline 32.3in Long |
| Type | Axles |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Yukon lists it as a one-side kit that fits either the left or right side. To replace both rear shafts you need two kits.
No. The Rubicon uses a Dana 44 rear axle with different shafts. This kit is only for JL models built with the Dana 35 200 mm rear, which is found on some Sport, Sport S and Sahara trims.
Yukon's published fitment covers 2018-2019 JL models. For 2020 and newer, check the axle tag to confirm a Dana 35 and send us your year and VIN so we can confirm the shaft before it ships.
The 29 spline 4340 chromoly shaft plus the axle bearing (2.875 in OD per Yukon), seal, retainer, wheel studs and ABS tone ring.
Yes. The flange is double drilled for both the 5 x 5 in JL pattern and the 5 x 5.5 in pattern, so you pick which studs to install.
Use 75W-90 gear oil filled to the bottom of the fill hole. If you add a locker or regear at the same time, follow that part maker's oil recommendation.
