Triumph Gearbox Bearing 3 Rail Rebuild Repair Kit 4 Synchro Spitfire Overdrive

The listed item featured is the overhaul rebuild and repair kit for the Triumph 3 Rail 4 Synchro Overdrive Gearbox.

This kit supplied is for the 3 Rail gearbox transmission for the Triumph Mk4 4 Synchro Models, and the Triumph Herald Gearbox 4 synchro. The main bearings are KSM brand. We use KSM brand bearings from Japan, a top-tier aftermarket brand that serves as the ideal replacement for the original RHP bearings supplied with the original equipment. While many suppliers opt for neutral or unbranded parts for the Triumph gearbox bearings, our kits and bearings are sourced from reputable brands, ensuring the highest specifications and performance standards.

The contents of the rebuild kit consist of the following parts:

1 x Gearbox 144595 Lay Shaft

Part No: 144595

1 x Gearbox 104433 Bearing Input Shaft

Brand: KSM

Part No: 104433

Size Details: MJ1N

1 x Gearbox 104433 Bearing Main Shaft

Brand: KSM

Part No: 104433

Size Details: MJ1N

1 x Gearbox 144782 Bearing Needle Roller

Part No: 144782

50 x Gearbox 119893 Needle Roller

Part No: 119893

6 x Gearbox BLS108 Steel Ball

Part No: BLS108

Size Details: 1/4"

3 x Gearbox 106388 Hub Springs 1st and 2nd Gear

Part No: 106388

3 x Gearbox 104445 Hub Springs 3rd and 4th Gear

Part No: 104445

1 x Gearbox 7H8325 Oil Seal

Part No: 7H8325

1 x Gearbox 22G1911 Gasket Lid

Part No: (22G1911)

1 x Gearbox 106437 Gasket Rear

Part No: (106437)

1 x Gearbox 122569 Gasket Bell Housing

Part No: (122569)

1 x Gearbox 120305 Gasket Remote

Part No: (120305)

1 x Gearbox 37H1901 Gasket Adaptor Plate to Overdrive

Part No: (37H1901)

This item fits the following vehicle models:

• Triumph - Spitfire (MkIV) (1970-1974)
• Triumph - Spitfire (1500) (1974-1980)
• Herald - (1959-1971)