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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £29.95 | 2 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £29.95 | 2 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £3.99 | 3 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £8.95 | 2 to 5 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £29.95 | 2 to 5 working days |
Product Number: 939
Manual gearbox and differential oil is rarely changed at service intervals, yet it degrades with use — losing viscosity improvers, anti-wear additives, and extreme-pressure protection. Contaminated gear oil accelerates wear on gear teeth, synchromesh rings, and bearings, leading to notchy gear changes and premature failure.
The BG 939 Gear Oil Fluid Exchange Tool enables workshops to perform a complete gear oil exchange in manual gearboxes and differentials efficiently and cleanly. Designed for professional use, it integrates into BG's transmission service programme to ensure full fluid replacement rather than a partial drain-and-fill.
Suitable for a broad range of manual transmissions and differentials. Intended for use by trained automotive technicians as part of a BG-supported transmission service.
Delivered in 2–3 working days to mainland UK. 30-day returns on unopened items.
About PartsForMachines:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Standard Delivery: £3.99
Delivery Estimate: 3 to 5 working days
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| Technical Specification | ||
|---|---|---|
| PRODUCT NUMBER | 9700-550.200.020 | FES100 |
A. The 939 is the BG Gear Oil Fluid Exchange Tool — a workshop tool that enables a complete gear oil exchange in manual gearboxes and differentials. It integrates into BG's transmission service programme to deliver full fluid replacement rather than the partial drain-and-fill available from the drain plug alone.
A. The 939 is for manual gearboxes and differentials — not for automatic, dual-clutch (DSG/DCT) or CVT transmissions, which use different BG service tools. Suitable for a broad range of manual transmissions and diff units; intended for use by trained automotive technicians.
A. The 939 is a reusable workshop tool — designed for repeated use across many vehicle services. The consumable in any exchange is the gear oil itself, drawn from a separate supply container into the manual gearbox or differential. With routine workshop care the tool gives long service life.
A. The 939 draws whatever gear oil is appropriate for the vehicle — manual gearbox oils and differential gear oils. The vehicle handbook or workshop database confirms the correct fluid; the tool itself is fluid-grade agnostic.
A. The 939 is supplied as a single workshop tool. For workshops running the gear oil exchange service regularly, contact the trade desk for bulk-ordering options.
A. Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the UK. For items damaged on arrival, report within 24 hours with photos to [email protected] — we will arrange collection and replacement at no cost. The Fit Guarantee covers hassle-free returns for parts that don't fit. Refunds go to the original payment method once inspected.
A. Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.
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