FRC8139 | Synchroniser Assembly - 3rd & 4th Mainshaft - V8 | Defender 1987-2006
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To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: FRC8139 - Synchroniser Assembly - 3rd and 4th Mainshaft
FRC8139 is a synchroniser assembly for the 3rd and 4th gears on the mainshaft of V8 Defender manual gearboxes. Fitted to the mainshaft of 5-speed V8 Defenders, the assembly equalises rotational speeds between the mainshaft and the selected gear to reduce gear clash and permit smooth engagement under load. Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Defender (1987-2006) - V8
Frequently Asked Questions
The FRC8139 synchroniser assembly equalises shaft and gear speeds to permit smooth engagement of third and fourth gears on the mainshaft of a V8 5-speed manual gearbox. Worn synchronisers commonly cause notchy or noisy shifts and difficulty selecting the affected gears, prompting replacement.
| Model | Variant |
|---|---|
| Land Rover Defender (1987-2006) | Mainshaft & Pinion (Manual Transmission, V8) |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Replacement is commonly carried out when shifting becomes notchy or noisy, or when engagement of third or fourth gears becomes difficult due to synchroniser wear. Inspect the gearbox during service and replace the assembly where wear is evident or performance is impaired.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
All products and accessories available on LRDirect.com come with a 2-year warranty.