Boss Differentials

Boss Differentials Also included in the team is Sharon Watson who helps with the promotion and operation of Boss Differentials.

Boss Differentials is a family owned business promoted, owned and operated by Graham and Jeff Watson who both have engineering tradesperson qualifications in Fitting and Turning. All work is carried out in house at Boss Differentials Lonsdale Workshop by Graham and Jeff. We are a very proud and exact business and back up all of our work for quality and durability and help many people with Race Cars, Hot Rods and Street Performance Vehicles.

12/04/2026

Steve Ramsey doing it at the street meeting at The Bend

Strange pro iron 9" diff centre for a tuff job in a street/strip application
05/12/2025

Strange pro iron 9" diff centre for a tuff job in a street/strip application

The boys with Vaughan and the BOSS at the Adelaide Auto Expo with the Torana, cool car great times
15/11/2025

The boys with Vaughan and the BOSS at the Adelaide Auto Expo with the Torana, cool car great times

Tuff Strange pro iron 9inch rebuild and upgrade to 35 spline for triple rotary powered drag racing car
04/07/2025

Tuff Strange pro iron 9inch rebuild and upgrade to 35 spline for triple rotary powered drag racing car

Nissan R 200 differential with full Nismo works ready for some action.
11/04/2025

Nissan R 200 differential with full Nismo works ready for some action.

Torana A9X Diff re build to original specifications
28/01/2025

Torana A9X Diff re build to original specifications

09/09/2024

First time down out of the gate at BMX , my Grandson 4year old Leo does a awesome job!!

Tuff borg warner diff completely built in house as per pics to suit a Mazda 1300 using dana spicer, Eaton harrop, superi...
29/05/2024

Tuff borg warner diff completely built in house as per pics to suit a Mazda 1300 using dana spicer, Eaton harrop, superior, willwood, timken and boss girdle parts

Pro iron Strange tuff diff centre combo built for tuff performance.
24/05/2024

Pro iron Strange tuff diff centre combo built for tuff performance.

Address

Unit 5/4 Scarborough Way Lonsdale
Adelaide, SA
5160

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+61435072942

Website

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