Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.

RKC5098 - Mainshaft – 5th Gear

Original price - Original price €60,70
Original price
€60,70
€60,70 - €60,70
Current price €60,70
Aftermarket Part
Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.
Mainshaft 5th Speed Gear for the LT77 and LT77S 5-speed manual gearbox.

This gear is mounted on the mainshaft assembly and meshes with the corresponding layshaft gear to provide the fifth speed ratio. Applies to LT77 and LT77S gearboxes up to and including suffix 50A, suffix F. When replacing this gear, confirm the gearbox suffix stamped on the casing - units from suffix G onwards use a revised specification.
Vehicle Model Land Rover Defender up to 2016
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — 5th gear mainshaft gear, 5-speed manual transmission
RANGE ROVER CLASSIC 1986-1991 — 5th gear mainshaft gear, to VIN HA610293
Alternative Codes
RKC5098BR 1516

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).


When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business dayscontact us before ordering.

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 RKC5098 mainshaft 5th gear and what does it do?
The RKC5098 is the fifth gear that mounts on the mainshaft of the LT77 and LT77S five-speed manual gearbox. It meshes with the matching layshaft gear to provide the fifth (overdrive) ratio, and it's fitted to the Land Rover Defender and Range Rover Classic running the LT77 transmission.
Which LT77 gearbox suffixes does this 5th gear fit?
This 5th gear fits LT77 and LT77S gearboxes up to and including suffix 50A and suffix F. Check the suffix stamped on the gearbox casing before ordering, because units from suffix G onwards use a revised specification. Matching the suffix stops you fitting a gear that won't mesh correctly.
Why does 5th gear fail on the LT77 gearbox?
Fifth gear on the LT77 typically fails through worn teeth, a whine in fifth, or the box jumping out of fifth under load. It usually wears because fifth carries sustained high-speed running. Replacing the worn mainshaft 5th gear restores a quiet, positive top ratio.
How do I confirm this 5th gear fits my vehicle?
Confirm fitment by gearbox type and VIN. On the Range Rover Classic this gear applies up to VIN HA610293, and on the Defender it covers the LT77-equipped years. Since the specification changed with the gearbox suffix, checking the casing suffix is the reliable final check.