Yank converter question
 

So my new transmission and converter have about 1500miles on them now and I just started really playing with the stall. The converter is a Yank SS3600 and was told it should foot brake about 2500RPM. I was out playing today and it will easily foot brake 3500RPM without even trying, I'm sure if I wanted to I could get more out of it if I were to try, and it is flashing at right around 4500RPM. I am not complaining or saying that the converter is bad because it is great, you would never know that it is stalling that high by just driving normal. Under normal throttle it starts to move the truck at about 1500RPM. I called Yank about it today and asked them if something was wrong and they suggested that there could be a tuning issue. I dont know too much about tuning, but is there something that should be changed in the tune for a stall converter? Is there anything in the tuning or mechanicaly in the transmission that would cause the converter to stall higher than it is supposed to?

P.S. it is a stock 5.3

have you checked the transmission fluid? low fluid means it has to spin faster before it can actually go.

There are trans slip tests, misfire tables, and thats about it. It sounds normal to me. I had an SS4000 in my 09 4.8 crew cab and it would foot brake about 4000 on street tires. Mine started moving at about 2000 rpms.

A big thing with converter is gearing and weight. If it has 3.42s or less gear, it will be looser than 3.73's or 4.10s. When i installed the 4.10's it tightend it up a lot!

Explain exactly how you are flashing to 4500please.
Taking off at 1500 and footbraking to 3500 sounds like a killer street / strip converter to me!

IF, If you can plant it. sounds like a hellaciously loose converter, I would love it!

The truck has a 4.10 trutrac rear end, it weighs in at right at 4000lbs, this has all been done on street tires and the transmission fluid is FULL. When I talked to Yank they told me to check true flash stall put the transmission into manual 2nd at about 15 MPH and bury my foot to the floor and when doing that it is flashing right around 4500RPM. I wonder what it is gonna do with the bottle on lol. I need more RPMs to use the converter. The reason I bought such a big converter for the stock 5.3 is just for future plans.

You can bet if thats a 60e that you prolly wont get to have this much fun for too long unless you had the shit built out of it!

The transmission is built, too what extent I have no idea.

I had a SS3600 in my old truck, 2004 RCSB 4wd 5.3L with 3.73s. I just had some bolt-ons and I could only foot brake it to 3,000rpm, and that was in 4wd. When in 2wd I could only get to around 2,700 or so before the rear tires broke loose.
In 4wd, the converter would flash right to 3,600 rpm.

I'm no expert, but your converter sounds way looser than mine was. You sure it is a SS3600?

100% says LS1 SS3600 right on the converter.