Syncro shifting sleeve 3rd/4th gear. Porsche 911 1974-86 (915 Gearbox)  ›  91130241128

Syncro shifting sleeve 3rd/4th gear
OE Match synchro shifting sleeve for third and fourth gear on Porsche 911 models from 1974–1986 with the 915 gearbox. A replacement component for repairs involving wear within the gear engagement assembly.
Fits

• Porsche 911 1974 - 1986 (915 Gearbox)

Diagram Ref no 13.

What This Product Does

The shifting sleeve forms part of the gearbox synchroniser assembly, working with the adjoining synchroniser and engagement components during gear selection. This product is the sleeve itself, rather than a synchroniser ring, brake band or complete gearbox repair kit.

Functions

• Participates in third- and fourth-gear engagement.
• Works with the associated synchroniser and selector components.
• Replaces a worn sleeve during transmission repair or rebuilding.

Symptoms of Fault

• Crunching or grinding during selection of third or fourth gear.
• Resistance or hesitation when engaging the affected gear.
• Uncertain engagement or a tendency to disengage.

These symptoms can also originate from the clutch, linkage or other internal gearbox components, so diagnosis should precede replacement.

Why Replacement Matters

Renewing a sleeve with confirmed wear addresses the damaged engagement component during a gearbox repair. Inspect the adjacent synchroniser rings, engagement teeth, selector components and supporting hardware before reassembly to identify related wear.

FAQs

Will fresh gearbox oil repair a worn sleeve?
No. Correct lubricant is important, but it cannot restore damaged engagement surfaces.

Should other components be checked?
Yes. Inspect the surrounding synchroniser assembly, selector mechanism and clutch operation rather than assuming the sleeve is the only cause.

Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the gearbox type and original reference as part of that check.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91130241128

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