Replacing the 6 Speed Transmission Fluid in the C5 Corvette



This was easier than I expected, and I saved a bunch of Cash doing it myself.
Don't be scared to do this yourself. Its a piece of cake!

My 2004 Z06 (7yrs old - 19K miles) had never had this fluid changed before.


What I got to perform this job:


1.) Amsoil - Torque-Drive™ Synthetic Automatic Transmission Fluid (ATD) (Need 1 Gallon)

2.) Amsoil - Hand Pump

Thanks to Corvette Forum Member "Subdriver" for hooking me up as a Amsoil prefered member and a good discount !





Be sure to have various tools on hand.
Specifically 3/8" drive socket, 7/8" socket, Torque wrench designed for 20 ft lbs, an oil drain container, and teflon tape can't hurt.
I also advise having some Simple Green for degreasing fluid spills, and Shop Towels for wiping up any mess made.



Put your car on Ramps, and ensure that the frame of the car is as "LEVEL" as you can get it. This is important.
The "FULL" level of the 6 speed transmission depends on the car being level.




This is the 6 speed transmission "FILL" plug. Viewed from the drivers side of the transmission.
Some C5 Corvettes have the sensor, and some don't have the sensor but still have the plug in this location.




This is the 6 speed "Drain" plug. Viewed from the rear passenger side.




Disconnect the sensor from the "FILL" plug (if present)
Be sure to remove the "FILL" plug first.
You don't want to drain your fluid and find that you can't remove the FILL plug later.




Place the oil drain pan under the "FILL" plug.
Use a 7/8" socket or a 7/8" open end wrench to remove the "FILL" plug
I got a steady little stream out of the "FILL" plug once removed (lasted only a min).




Place the oil drain container under the DRAIN plug location of the 6 speed transmission
Remove the DRAIN plug.
It's going to pour out very quickly. Be ready for this.
This is where the Shop Towels, and Simple Green come in handy. 8-)




Clean both the FILL and DRAIN plugs. I put a couple turns of teflon tape around both for a little more security.
Clean the area around the DRAIN plug. Reinsert the DRAIN plug, and torque to 20ft lbs (as per GM manual).




Install the Amsoil hand pump into the Gallon of Amsoil Torque-Drive™




Insert the end of the plastic tube an inch or so inside the FILL hole.
Place a shop towel directly under the FILL hole to catch liquid pouring out.
Slowly pump the Gallon into the transmission.
Once you start to notice some pouring out of the FILL hole then your FULL !
I only managed to get about 80% of the gallon into the transmission before it leaked out.
I let it settle about 20 mins to debubble. It took a couple more pumps and it leaked out again.
Clean the area around the FILL hole.
Insert the FILL plug, tighten to 20ft lbs (as per GM manual), and reconnect the sensor cable



Enjoy your fresh fluid change in your 6 Speed Transmission...!