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School me on torque converters, single vs triple disc

26K views 16 replies 8 participants last post by  Master_Chase  
#1 ·
I search around and that didn't help me much.

Looking at getting a new torque converter and I'm trying to figure out if I should get a single or triple disc, so what are the pros and cons of both.

Thanks in advance
 
#2 ·
from my basic understanding and someone else may chime in.

Triple will hold more power but my also be a bit "rough" (subjective to the users), rough enough to potentially cause other trans parts to give up the ghost.

where a single wont hold as much power but engagement is more stock/refined

i found this to watch later but maybe help :
 
#9 ·
from my basic understanding and someone else may chime in.

Triple will hold more power but my also be a bit "rough" (subjective to the users), rough enough to potentially cause other trans parts to give up the ghost.

where a single wont hold as much power but engagement is more stock/refined
I've read about triples breaking things when locking up on factory transmissions but that was on a Cummins forum about the 48RE since the 5r110 is shipped much beefier than it from the factory I didn't know if it would be a problem also.
 
#10 ·
I just installed my Valair triple disc converter on saturday. Rated for 550 rwhp so I called the guy and told him I need it to hold 800 rwhp and he said he would have zero issues doing that. I didn't know they made converters.. but it's in my truck now on an otherwise stock transmission. I drive it on a 600 rwhp tune or so every day. Only been a week but I do not notice a difference whatsoever at all. It drives the exact same. Don't even feel it lock up. I love it. My triple disc in my dmax locks in hard enough to spill half your drink when my 5er is connected to it. The converter did come out of a truck with a trans that was destroyed at about 500 hp, so uncertain as to why that happened. I had it cut open and cleaned and given the green light. Doesn't scare me one bit, I'm happy with it!
 
#12 ·
I think the lockup can be made less harsh with tuning. My old 6.0 when locking up in 4th would jerk the whole truck with the stock converter. I used the same tune writer this go around but don't feel it at all. Not even with my triple disc. It's completely smooth. I think it's how quickly the lockup is commanded..
 
#13 ·
Bump .....
 
#14 ·
6.0 trucks are indeed triple disk from the factory. The 7.3's originally were single disk. The more clutches in the converter are just like in the auto transmissions they are supplying the power too. More clutches=more holding power. The guts inside can mechanically help with quicker/harder lockup (in principle like a mod'd VB in a 4R100), but generally that is done through the TCC solenoid by making them larger inside for more flow. Also tuning controls line pressure, which in turn can make the lockup soft/harsh.

FWIW, I carry DPC converters. And for those that are not familiar with Phil the owner, he was the guru at Precision for quite awhile until about 6yrs ago, and then he jumped ship when quality was going down hill and started his own shop. I do believe P.I. has since improved from what I hear/read from around the watering hole. ;)
 
#15 ·
I looked around your site and didn't see DPC converters but I did see AFE which do you recommend?
 
#17 ·
What's the stall speed on the heavy duty one?