Overview
The Alloy USA 21109 is a chromoly Dana 35 rear axle shaft for the driver side, with 30 splines. It is made for non C-clip axles in 1987-1990 applications that use an aftermarket 30 spline differential. It fits 1984-1990 Jeep Cherokee (XJ), Comanche, Wagoneer and Wrangler (YJ) models.
The shaft is made from 1541H or 4140 steel and is heat treated and induction hardened, with up to 35% more strength than stock. With 30 splines, it engages only gears cut for 30 splines, so check the differential before choosing it.
Key features
- Chromoly replacement shaft for the Dana 35 rear axle
- 30 spline
- Driver side
- Fits 87-90 non C-clip axles
- Requires an aftermarket 30 spline differential
- Alloy USA says its shafts are heat treated and induction hardened
- Bearings, seals and studs are not included
- Axle shaft location: Driver side, rear left
Why spline count and length matter
A Dana 35 shaft only works when the gear set inside the axle matches it. Because this shaft is 30 spline, the differential has to be an aftermarket 30 spline unit, and stock gears will not engage it correctly. Before you buy, pull the old shaft and count the splines, measure the length from flange to end, and check that the axle uses a retention style matching this non C-clip design.
Once the new shaft is installed, check the axle bearing seat for wear and clean the spline ends before assembly. The driver side shaft carries load through the hub, so a loose retainer or worn bearing can cause vibration that feels like a shaft problem. Replace worn parts together to keep the rebuild consistent, and recheck fastener torque after the first few drives.
- Count the splines on the old shaft
- Confirm the differential is 30 spline before ordering
- Check bearing seats for wear
- Replace the retainer hardware with the shaft
Specifications
The 21109 is a chromoly replacement axle shaft for the Dana 35 rear axle, with 30 splines and an overall length of 30.420 (unit not given). Every figure in the table below is the manufacturer value for the 21109.
| Brand | Alloy USA |
|---|---|
| Part number | 21109 |
| UPC | 70000446880 |
| Part type | Chromoly replacement axle shaft |
| Axle | Dana 35 rear |
| Axle shaft location | Driver side, rear left |
| Spline | 30 spline |
| Overall length | 30.420 (unit not given) |
| Manufacturer part number | ALY21109 |
| Application stated | 87-90 non C-clip |
| Required parts | Aftermarket 30 spline differential |
Vehicle fitment
The manufacturer fitment list for the 21109 names: 1984–1990 Jeep Cherokee (XJ); 1986–1990 Jeep Comanche; 1984–1990 Jeep Grand Wagoneer (SJ); 1984–1990 Jeep Wagoneer (SJ); 1988–1990 Jeep Wrangler (YJ).
Application: 87-90 non C-clip.
Match the 21109 against your old shaft for spline count, length and driver or passenger side before installing it.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
It is for non C-clip axles and requires an aftermarket 30 spline differential. Bearings, seals and studs are not included.
What’s included
One axle shaft.
Not included: 30 spline aftermarket differential (required), Bearings, Seals, Studs.
