Fully Reconditioned Helical Gearbox – 3.44 Final Drive – Exchange Unit – for Classic Mini and Moke
Professionally fully reconditioned helical gearbox, rebuilt using premium quality components to deliver dependable performance and long service life for your Classic Mini.
Fitted with a 3.44:1 final drive ratio, this gearbox provides excellent acceleration and is a popular choice for performance road cars, spirited driving, and many standard Classic Mini applications.
Each gearbox is completely dismantled, inspected, and rebuilt using quality components. Worn or damaged gears are replaced where necessary, and no inferior or defective parts are reused during the rebuild.
Features
- Fully reconditioned helical gearbox
- 3.44:1 final drive ratio
- New ball bearings fitted throughout (except beneath 1st and 2nd/3rd gears where serviceable)
- Performance layshaft
- Special oil pick-up pipe
- Upgraded differential pin
- Worn or damaged gears replaced where required
- Professionally rebuilt using quality components
- Suitable for A-Plus Classic Mini applications
Warranty
- 6-month warranty covering replacement parts only
- Labour is not covered under warranty
Important: If the gearbox is installed by a third-party workshop, labour costs associated with removal or refitting are not covered under warranty.
Exchange Information
This gearbox is supplied on an exchange basis.
Your exchange gearbox must:
- Be an A-Plus gearbox
- Be fully serviceable
- Have no damage to the transmission casing, particularly around the idler gear housing
- Be supplied with the required final drive ratio
- Be completely drained of oil
- Be externally cleaned prior to return
Exchange units must match the gearbox ratio ordered unless alternative arrangements have been agreed before purchase.
A surcharge applies to encourage exchange at the time of purchase and is refunded once a suitable exchange gearbox has been received and inspected.
If your exchange gearbox is unsuitable or fitted with a different final drive ratio than required, additional charges may apply.
Important Notes
- Input gear is not included
- Exchange gearbox must be clean and fully drained before return
Final Drive Identification Guide
If you are unsure of your gearbox's differential ratio, count the teeth on the pinion gear:
- 18 teeth = 3.44:1
- 19 teeth / 59-tooth crown wheel = 3.10:1 (most 998cc and carburetted 1275cc Minis)
- 19 teeth / 61-tooth crown wheel = 3.20:1 (SPI 1275cc models excluding MPI)
- 20 teeth = 2.90:1
- 21 teeth = 2.76:1 (MPI models – special exchange only)
Why Buy from Mini World Australia?
✔ Trusted Classic Mini & Moke specialists since 1996
✔ Huge range of Classic Mini parts and accessories
✔ Australia-wide and international shipping available
✔ One-stop shop for Classic Mini parts, restorations, styling, and upgrades
✔ Experienced enthusiast support with extensive product knowledge
✔ Passionate about Classic Minis and Mokes with over 30 years industry experience
✔ Trusted by restorers and enthusiasts Australia-wide
✔ Quality parts for restoration, styling & performance
Please Note: This is a Special Order Part. We'll custom order this for you when you place your order. Estimated delivery time is approximately 2–4 weeks.
Please note: This part is bulky and may attract aditional freight charges
Important Freight Information:
This product is shipped from the UK.
As the packaged item is classified as bulky freight, standard shipping rates do not apply.
Additional courier and handling charges will be payable by the purchaser and will be calculated based on the delivery destination.
The customer will be notified of these costs before the item is dispatched.
