Here is the machine that was used

BG PF5 Power Flush and Fluid Exchange System
http://www.bgprod.com/autodrive.html

You can use any type of fluid you want according to them.

Disclaimer: I have no affiliation with BG.

The cleaner he put in was the
"BG Quick Clean for Automatic Transmissions" (part No. 106)


We also did a three part thing for the fuel system.
http://www.bgprod.com/autofuel.html

Used the thing on the top (Inject-A-Flush)
Shot some stuff through the air intake and put some stuff in the fuel.

I do not know how many of the fuel system cleanings my brother has done but he claims only one person has told him it did not make a difference in performance/fuel economy.

That said, I have not noticed much of a difference (yet) on my SVX.