The rear differential is an often neglected but essential component of the high performance drivetrain in an Aston Martin DB9. Most people know about engine oil and transmission fluid, but what about the unsung hero of the rear wheel drive – the differential? All Gaydon era Aston Martins (DB9, Vantage, DBS, Rapide and Vanquish) have a ‘limited slip’ high performance rear differential. It is lubricated by special gear oil (differential fluid). For cars with automatic transmissions Aston Martin recommends it be changed every two years as part of the 2 year annual service regime (learn about that here). I dug in and researched what the correct differential fluid. It is different for manual or automatic transmission vehicles, so read on which one is right for your car. Continue reading “Differential Fluid for an Aston Martin DB9”
This is the second part of my post on Changing the Rear Differential / Transaxle Fluid and Filter on a DB9. You should really check out my previous post and video on draining the rear differential fluid first as this is a continuation of that process (you can find it here).
We left off with the car in the air, rear under tray removed, drain & fill plugs removed, oil drained and filter removed. Time to get on with putting it back together! Continue reading “Changing the Rear Differential / Transaxle Fluid and Filter on an Aston Martin DB9”
One item that pops up on the DB9 Annual Service requirement periodically is changing the rear differential / transaxle fluid. To be clear this is NOT the transmission fluid (which in theory never needs changed). I am covering only the process of draining the fluid in this post, and will cover changing/cleaning the filter and refilling the oil in the next post [I just don’t want the post to be too long].