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ID3790 - Ball Bearing – Overdrive Mainshaft

- €47,50
€47,50
€47,50 - €47,50
€47,50
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.
Overdrive Mainshaft Ball Bearing for the Fairey-type overdrive unit fitted to Series Land Rovers. It supports the mainshaft within the overdrive housing, locating the shaft against radial and axial load as drive passes through the unit.

This is the large main bearing of the overdrive, a 6308-pattern deep-groove ball bearing. The companion large roller bearing in the unit is RTC7179.
Vehicle Model Land Rover Series 1
Land Rover Series 2 and 3
Fitment Notes Fitment data limited — derived from web research, verify if uncertain
SERIES I — Fairey Overdrive
SERIES II/IIA/III — Fairey Overdrive
Alternative Codes
ID3790

In stock 1 unit
0 · 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 ID3790 overdrive mainshaft bearing for?
The ID3790 is the main ball bearing for the Fairey-type overdrive fitted to Land Rover Series models. It supports the overdrive mainshaft inside the housing, locating the shaft against radial and axial load as drive passes through the unit.
Where does the ID3790 bearing sit in the overdrive?
The ID3790 sits inside the Fairey overdrive housing, carrying the mainshaft as it turns. It's the large ball bearing that takes the main shaft load on Land Rover Series 1, 2, 2A and 3 fitted with a Fairey overdrive.
What are the signs the ID3790 overdrive bearing needs replacing?
A worn ID3790 bearing usually shows up as a whine, rumble or growl from the overdrive, often louder under load or when the overdrive is engaged. Play or roughness when turning the shaft is another sign. Left unchanged, a failing bearing can damage the overdrive internals.
Is the ID3790 the only bearing in the Fairey overdrive?
No. The ID3790 is the large ball bearing that carries the mainshaft in the Fairey overdrive. The unit also uses a separate roller bearing elsewhere in the housing, so check which bearing you need before ordering. This listing covers the ball bearing only.