FlexiRide 3,500 lb Torsion Arm Spindle Kit - EZ Lube - FA-35 Trailer Axle
Replacement torsion arm spindle kit for compatible Universal Group FlexiRide 3,500 lb torsion axle applications. Includes the spindle arm and required spindle nut, washers, and Grade 8 hardware shown in the kit bill of materials.
Overview
This replacement torsion arm spindle kit is designed for compatible Universal Group FlexiRide torsion axle systems. It is commonly used when servicing or replacing a damaged, worn, or compromised torsion arm spindle on compatible 3,500 lb FlexiRide axle setups.
This kit includes the spindle torsion arm along with the related spindle nut, spindle D-washer, tang washer, and Grade 8 mounting hardware listed below. It is intended for FlexiRide applications only and should not be assumed to fit other torsion axle brands.
R&P Service Insight
Torsion axle spindle fitment is measurement-sensitive. Matching the axle rating alone is not enough; the spline count, bearing journals, seal surface, and mounting hardware should all be verified.
- FlexiRide Application: Designed for compatible Universal Group FlexiRide 3,500 lb torsion axle systems.
- Critical Fit Check: Confirm the 59-spline configuration before installation.
- Hardware Included: Includes the listed Grade 8 cap screws, thru-hardened washer, tang washer, spindle D-washer, and spindle castle nut.
R&P Knowledge Hub
Compatibility: Intended for compatible 3,500 lb Universal Group FlexiRide torsion axle applications where the measurements and spindle configuration match.
Axle System: FlexiRide torsion axle with 59 spline teeth and standard 4-bolt brake flange.
Installation Notes: Verify spline count, approximate mounting bore, bearing sizes, seal reference, axle nut thread, and brake flange style before installation.
Performance Insight: A properly matched replacement spindle kit helps restore serviceability to compatible FlexiRide torsion axle assemblies without replacing unrelated components.
Brand & Fitment Note
Selling Brand: R&P Carriages / FlexiRide-compatible service kit.
Application Reference: FlexiRide and Universal Group names are used to describe the intended axle system compatibility.
What This Means: This listing is for a replacement torsion arm spindle kit for compatible FlexiRide axle applications where the specifications match.
Before Ordering: Verify spline count, spindle dimensions, bearing references, seal size, axle nut thread, brake flange style, and included components before installation.
R&P Repair Insight
This type of spindle kit should be matched carefully against the original part. If the axle has been modified, damaged, or previously repaired, confirm the current installed dimensions rather than relying only on the trailer year, model, or axle rating.
- Spline Count: Confirm the torsion arm uses 59 spline teeth.
- Bearing Match: Verify the common 1-1/16" outer bearing and 1-3/8" inner bearing references match your hub setup.
- Seal Surface: Confirm the grease seal reference and seal surface before reusing or replacing the hub.
Features
FlexiRide Torsion Axle Fit
Designed for compatible Universal Group FlexiRide torsion axle systems rated at 3,500 lb per axle pair.
59-Spline Configuration
Uses a 59-spline design for matching compatible FlexiRide torsion arm assemblies.
Standard Brake Flange
Includes a standard 4-bolt brake flange for compatible trailer brake setups.
Hardware BOM Included
Includes the listed spindle nut, washers, tang washer, and Grade 8 yellow zinc cap screw hardware shown in the kit contents.
Specifications
| Specification | Detail |
|---|---|
| Part Number | FA-35P LUBE-KIT |
| Product Type | Torsion arm spindle kit |
| Axle Rating | 3,500 lb per pair |
| Axle Type | FlexiRide torsion axle |
| Spline Count | 59 spline teeth |
| Approx. Mounting Bore | 1-3/4" |
| Brake Mount | Standard 4-bolt brake flange |
| Axle Nut Thread | 1-14 |
Bearing & Seal Info
| Component | Typical Size / Reference |
|---|---|
| Outer Bearing | 1-1/16" — typically L44649 |
| Inner Bearing | 1-3/8" — typically L68149 |
| Grease Seal | 1.719" x 2.56" — typically Dexter 010-019-00 |
| Fitment Note | Confirm actual bearing and seal numbers from your existing hub before ordering. |
Fitment / Application
| Category | Details |
|---|---|
| System | Universal Group FlexiRide torsion axle systems |
| Primary Fit | 3,500 lb FlexiRide torsion axle applications |
| Required Match | 59 spline teeth, 1-3/4" approximate mounting bore, 4-bolt brake flange, and matching bearing/seal surfaces |
| Not Included | Bearings, grease seal, hubs, drums, brakes, and any components not specifically listed in the kit contents below |
Included Components
| Quantity | Part Number | Item |
|---|---|---|
| 1 | 15319 | 5/8"-11 x 4" Grade 8 yellow zinc finish hex cap screw |
| 2 | 33819 | 5/8" x 1.312" OD thru-hardened yellow zinc finish steel washer |
| 1 | 37188 | 5/8"-11 Grade 8 yellow zinc finish NE steel nylon insert lock nut |
| 1 | 5-101 | Tang washer, 1.00 standard, 2K to 8K axle |
| 1 | FA-35P LUBE | Spindle torsion arm, FlexiRide 3500 lb, splined arm |
| 1 | FA-DW100 | 1" spindle D-washer |
| 1 | FA-SN100 | 1" spindle castle nut / axle nut spindle nut |
