Product Overview
The A-7934 1st/2nd Transmission Synchronizer Assembly is supplied as a new independent aftermarket replacement for professional transmission repair. This low-range synchronizer assembly is intended for the 1st/2nd position in selected FS-5406, FS-6406, and FS-8406 series transmissions. Reference part number A-7934 is provided to support part-to-part comparison, not as a substitute for application verification.
It helps coordinate component speed during first- and second-gear shifts, where accurate fit and correct engagement surfaces are essential. The specified position is 1st / 2nd, with Tooth Count: 60. 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.
- 60-tooth configuration for the 1st/2nd shift location.
- Reference part number A-7934 supports accurate cross-checking.
- Professional installation and inspection of mating components are recommended.
Product Specifications
| Reference Part Number | A-7934 |
|---|---|
| Product Type | 1st/2nd Transmission Synchronizer Assembly |
| Condition | New |
| Replacement Type | Independent Aftermarket Replacement |
| Component Position | 1st / 2nd |
| Tooth Count | 60 |
| Transmission Application Reference | FS-5406 / FS-6406 / FS-8406 Series |
Application and Ordering
Identify the exact transmission series and make sure the removed part is the 1st/2nd assembly. Compare all 60 teeth, internal splines, hub and sleeve dimensions, groove pattern, and external shape before purchase. 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 A-7934 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 A-7934?
Confirm the exact transmission model and compare the reference number, component position, tooth count, dimensions, spline or tooth details, and physical configuration with the removed part.
Which shift range does A-7934 serve?
It is intended for the 1st/2nd synchronizer position in the listed transmission series, subject to verification against the original assembly.
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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