I had some transtune in my tranny for about 20-30 miles now.. awesome stuff. My 2-1 shift used to be about 4 seconds, and now its just like every gear, and is just under 1 second. My shifts have smoothed out a lot, and when cold, it isn't like someone is kicking my car with a really big foot. However, when I bought the transtune, Napa didn't have the motor stuff.
I went to South Bend yesterday, and went to advanced auto [where a '97 gtp owner and I had a good talk about the 3800s, and told him about club gp, and bonneville club] and picked up some of the engine cleaning stuff. That guy recommended putting it on my brake booster line, but with the TEVES brake system, that wasn't an option, and he said, to just put it in the PCV valve [just as the instructions stated].
I removed the PCV valve elbow, and put in about 4 [full size] straws worth of the engine cleaner. I then poured the rest in the oil [approx 3/4 can]. I waited 5 minutes like the instructions stated. Started up the car and there was so much smoke, I had to get out of the car, and get about 20 feet away. Let her idle till the smoke died down a little, and revved it up, and same thing happend, just so much smoke came out. Let the car idle for about 5 minutes, and there was still smoke.
I haven't driven the car yet, but I can pretty much garuntee that it made a HUGE difference, because I bet that stuff doesn't burn black in it'* natural state. I paid $11 for the two, and the transtune has already paid off, and the engine stuff, i'm sure will. I recommend this stuff to EVERYONE, old or new.
Okay, I've said my peace.
'89 SSE - GX3 -190k, 155k on body - Back for another ride.