Changing the Automatic Transmission Fluid in an Aston Martin DB9 - Part 3

In this video series I will show you how to change the automatic transmission fluid and seals in a 2005 Aston Martin DB9 Coupe equipped with a 6-speed Touchtronic II transmission. Most DB9's built between 2004 and 2014 have this transmission (unless equipped with a manual stick shift).

The transmission is really a ZF model 6HP26. This transmission requires service every 50-75K miles OR 8 years at the most.

Aston Martin didn't make this easy. Their approach was 'filled for life' assuming that most DB9 owners don't use their cars much. No fluids last for ever, and since ZF makes it for Aston, you can be sure it needs done every 8 years.

There is a right way and wrong way to do it. Just pulling the drain plug and refilling it is probably the wrong way. Doing the entire procedure is the right way, and I'll explain why and show you the difference in this video.

The whole process will take you about 4 hours to do yourself in your garage at home. You will probably spend about $400 on the parts that are needed to do it right.

This is the third video in the four part series where I show you how to do it all in detail from start to finish. This video is focused on the 'Putting it back together steps' and I cover reinstalling the new Mechatronic Valve and Bridge Seals, the Mechatronic Unit, the Electronics Sleeve, the Oil Pan/Sump, the Thermostatic Valve and Cooler Lines, and performing the initial fluid refill of the Transmission. If you want to jump to a specific section:

0:00 - Introduction
0:59 - Installing New Mechatronic Valve Seals
1:58 - Installing a new Mechatronic Bridge Seal
2:29 - Installing the Mechatronic Unit
6:32 - Cleaning the Electronic Contacts
7:07 - Installing a new Electronics Sleeve
10:00 - Install a new Oil Pan/Sump
16:49 - How the Thermostatic Valve Works
19:50 - Installing the Thermostatic Valve and Cooler Lines
23:30 - Reconnecting the Electronics Connection
24:04 - Releasing the Park Override Lever and Testing
25:08 - Initial Fluid Refill
30:40 - Installing the Fill Plug
31:13 - How much Fluid went in during Initial Fill
31:53 - Your Car is NOT ready to drive

Previously In part 1 I showed you how to get ready for the steps in this video including why you need to service the transmission, the parts you'll need and the tools necessary to tackle the job.

Previously in part 2 I showed you all the steps to take it apart and drain nearly 10 liters of old fluid out.

Up next in part 4 I show you how to properly check and set the final fluid levels so you can get your baby back on the road.

You can find more details about the process over on my companion blog article at https://aston1936.com/2020/10/06/chan.... There you will find links to the parts, tools, and the official ZF service guide. I highly recommend you check out the article.