FRC4501 - O-Ring – Extension Case – LT77

- €0,40

€0,40

€0,40 - €0,40

€0,40

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Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

O-Ring for the LT77 five-speed manual gearbox. It seals the mainshaft and extension case joint against transmission oil loss.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994

Fitment Notes DEFENDER 1987-2016 — LT77 manual transmission extension case/mainshaft O-ring (incl. Puma 2007> from VIN LA939975)
DISCOVERY 1 1989-1998 — LT77 manual transmission (4cyl & V8), VIN FA393361 to WA799999
RANGE ROVER CLASSIC 1986-1994 — LT77 manual transmission (to VIN HA610293 / from JA610294)

Alternative Codes

FRC4501

In stock 12 units

11 · Gouda 1 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the FRC4501 O-ring?

The FRC4501 is an O-ring that seals the mainshaft and extension case joint on the LT77 five-speed gearbox, preventing transmission oil loss at that joint.

Which models use it?

It fits the LT77 gearbox on the Defender 1987 to 2016 (including Puma from VIN LA939975), Discovery 1 (VIN FA393361 to WA799999) and Range Rover Classic 1986 to 1994.

Can the O-ring be reused?

Replace the O-ring whenever the extension case is separated. O-rings typically take a set once fitted and will not reseal reliably if reused, risking an oil leak.