Today I swapped out my Yank SS3600 for a Yank PT4000. Reason being I'm looking for more performance at the track. From what I heard I expected it to be a bit looser than the SS3600. It probably is to some degree but not anywhere near what I thought it might be.

I think the reason is when I went from a 2200 stall to the Yank SS3600 it was a big jump and I could notice the difference. This time the difference was not that much. So far on the street (12 miles) everything is good. This converter also has the lock up and I currently have it set at 45mph. I might change that and move it up some.

One thing I did notice was the lock-up rpm at speed and I'm not sure as to why. With the SS3600 going down the freeway at 70mph(3.70 gears) my rpms were around 2500-2600rpm. With the PT4000 the rpm is around 2300 rpm. Now I have to go 150 miles with normal driving to break in he PT4000 with the Kelvar lining. I did no break in with the SS3600. So I'm wondering if the SS3600 might have been slipping a tad in lock up?

One more thing the Yank SS3600 is a great all around street strip converter. In a month I will report back my findings on the PT4000 as I will have put on some miles and made some passes down the 1/4 mile and will compare my times.

 

When I replaced an SS4000 with a PT4400, I had similar results as far as streetability. It was looser, but not what I was expecting. It amounted to a few hundred RPM's accelerating with traffic. Might sound like a lot, but it sure didn't feel like it. The big gains were at WOT where the looseness was more noticeable. Definitely looking forward to your track results.

 

Great converter, I love mine.

Yeah I would say your SS3600 must have been slipping a bit.

 

Have you eliminated the PWM function of your TCC?

 

i was thinking about doing the same thing so im curious to what type of improvements u will see at the track. I will have to say that i have no complaints with ss3600, so +2 on that its a great all around converter!

 

What is this??

 

The transmission is in my 1989 Trans Am with a stand alone TCI controller. I will be at the LA Invasion and participating in the Sunday TNT session. The car is a grey GTA if anyone is going.

 

Yank rules !!!!!!

 

The factory setup allows the lock up clutch to slip some to allow for a smoother lock up apply. Using that function on a smaller aftermarket converter (with usually less clutch area) will wear them out quicker. You can change it in the tune or some shift kits come with a new TCC valve that will eliminate the PWM and just make it on/off.

Should be indicative of the P1870 code.

Not sure how the stand alone TCI controller is setup.

 

Its been 9 months. Whats the results?

 

Hey ill even settle for anyones experiences with this converter. After researching how much the Pt series kicks *** in higher rpm as well as dig im considering it.

 

i can't compare it to any other converter but i run the yank pt 3800 2.0 str. it will not hit quite as hard as the pt4000 i am guessing. i have only been to the track one time and i ran 1.68 60-ft times on a full weight car with 3.23 gears. i was happy. i dropped 8 tenths in the 1/4 from the converter swap ( i did change from pacesetter LT's with TSP y-pipe to american racing headers and y-pipe at the same time). however, i can't imagine that swap gave any more power. i just wanted the stainless steel.

 

Well yea, your right but from what iv been reading the PT series is best overall converter through out whole rpm range (from yank anyway)
I would rather have a little lower str along with kick *** top end.
Did yank make that PT3800 just for you? I ask because I dont see it on their cart.

 

Not with my laptop right now but you don't happen to know what these values would need to be changed to in EFI live do you?

Or is it an on/off function?