I had attempted to have the fluid changed on the '86 about one year ago. If you are going to change the fluid, it's mandatory to drain the t/c in the process. However, we could not find a drain plug on the t/c for the SDL and, therefore, I had to resort to the flush.

So, if you are going to drain it.........see if you can locate a drain plug on the t/c. There is another member who also failed to find a plug on this vehicle.

If you cannot find the plug, you're forced to flush it. Leaving three quarts of old fluid in the system is not what you want to do.