Product Overview
The S-3108 Transmission Mainshaft Assembly is supplied as a new independent aftermarket replacement for professional transmission repair. This mainshaft assembly is intended for compatible RTLO-18913A transmission rebuilding and includes a 17-tooth reference feature for identification. Reference part number S-3108 is provided to support part-to-part comparison, not as a substitute for application verification.
The shaft carries gears and related sliding parts along the central drivetrain axis while transmitting output torque through its splines and machined sections. The specified position is Transmission Mainshaft, with Tooth Count Reference: 17 Teeth. These details should be checked against the removed component and the transmission build information before purchase.
Key Features
- New independent aftermarket replacement for transmission rebuilding.
- 17-tooth reference feature for comparison with the removed mainshaft.
- Reference part number S-3108 supports accurate cross-checking.
- Professional installation and inspection of mating components are recommended.
Product Specifications
| Reference Part Number | S-3108 |
|---|---|
| Product Type | Transmission Mainshaft Assembly |
| Condition | New |
| Replacement Type | Independent Aftermarket Replacement |
| Component Position | Transmission Mainshaft |
| Tooth Count Reference | 17 Teeth |
| Transmission Application Reference | RTLO-18913A |
Application and Ordering
Verify the RTLO-18913A application and inspect the original shaft carefully. Compare the 17-tooth feature, spline locations, bearing journals, gear seats, shoulders, snap-ring grooves, total length, and both shaft ends. Application lists can include variations by build date, ratio, housing, or internal configuration. If any detail differs, request a dimensional check before ordering. Installation should be performed by a qualified transmission technician, with mating parts, bearings, lubrication paths, and adjustment settings inspected during assembly.
Frequently Asked Questions
Is S-3108 a genuine branded part?
No. This is an independent aftermarket replacement compatible with selected Eaton / Fuller applications. These names and reference numbers are used solely for identification and compatibility comparison; no affiliation, authorization, sponsorship, or endorsement is claimed.
What should be checked before ordering S-3108?
Confirm the exact transmission model and compare the reference number, component position, tooth count reference, dimensions, spline or tooth details, and physical configuration with the removed part.
Does the 17-tooth detail alone confirm S-3108 fitment?
No. It is an important identifier, but the transmission model, shaft length, splines, journals, grooves, shoulders, and end details must also match.
Compatibility and IP Notice
All third-party brand names, model designations, logos, and part numbers are the property of their respective owners. They are used solely for identification and compatibility reference. This independently supplied aftermarket replacement is not an OEM or genuine branded product and is not manufactured, authorized, licensed, sponsored, affiliated with, or endorsed by any referenced trademark owner.
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