Locking converter at wot
03-22-2009, 03:44 PM
#1
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Locking converter at wot Hi to all again, I just had a few questions to see if any one has tried locking their converters in 3rd at wot. I have a yank SS4000 and was going to try to lock it in 3rd at 90 mph through the 1/4. They say it helps a few tenths and a couple mph. What do you all think.
03-23-2009, 10:35 AM
#5
Locking near the top of third should not hurt anything with the trans. The only time locking is likley to cause any real risk of damage to the trans is it you lock in 1st or second and allow a shift to occur while locked because the drive train impact is brutal when that happens.
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03-25-2009, 11:17 AM
#8
The only thing about locking the converter under WOT in 3rd gear is if the trans can handle the pressure required to lock the TCC under those conditions. I have experienced some 4L60E and 4L65E that take a good second or two to lock up the TCC, so if you command it to lock at 95mph, it could take upto 105mph to actually lock.
The stock converter doesn't lock up at WOT in any gear either. Nor would I recommend it. Your converter might not be very efficient or is mismatched to your combo. Typically you will see as much as 2 MPH increase from the right converter, or staying at the same MPH.
The stock converter doesn't lock up at WOT in any gear either. Nor would I recommend it. Your converter might not be very efficient or is mismatched to your combo. Typically you will see as much as 2 MPH increase from the right converter, or staying at the same MPH.
03-25-2009, 03:30 PM
#10
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Its a 3000 stall, I have 3.42 gears and a 226/226 .585/.585 112lsa cam. 385 rwhp 375 rwtq it shifts at 6400rpm, 350 ft lbs of tq comes in at about 3000 and holds that much or more till about 5800 rpm. I thought a 3000 stall would put me in the peak of the power band. :shrug:
Sorry if I hijacked the thread a little, I figure we are kinda on the same subject though wanting to lock the converter at WOT in 3rd.
03-25-2009, 07:51 PM
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I talked to yank on Tuesday and they said absolutely never lock it under WOT. Even the multi disc will fail. So that answered my question. I wont ever try to lock it under wot. Thought I would let you guys know, Yank Said Never do it. Later
03-25-2009, 09:13 PM
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I have seen multi disc fail though, any lock-up clutch that fails is not good. And can u guarantee for years that your's can take hundreds and hundreds of wot lock-ups?
03-25-2009, 09:44 PM
#14
True, I have only had my multi in cars for about 2 years now, but so far so good. I have seen some of them back after a race season of abuse and still looked good, big HP cars/trucks. My Multi is designed from scratch, every piece is custom made. I don't want to turn your thread into a big sales pitch, but I basically over-engineered these for some serious abuse. Check out my website for more specs.
Chris
Chris
03-25-2009, 10:41 PM
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It sounds like a nice product but I just bought my yank 1 month ago. It took me from a 13.2 to a 12.3 with a 1.60 60'. So I am happy with my yank. But I do appreciate all of your help and maybe in the future I might look into you guys.
03-25-2009, 11:47 PM
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i have to agree w circle d on this one. if its not made for it DONT do it. if its a multi-disc it should be able to handle it, or at least i would want it to.
03-26-2009, 07:27 AM
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I spoke to a guy at yank on monday and he said the same thing to me. I wasnt sure if he was just trying to sell me a converter or if it was true. Performabuilt says it is ok and Circle D says it is ok. Dont freaking know. I guess if it took a dump then I will probably by a Circle D or a Yank.
03-26-2009, 08:43 AM
#19
I would listen to Chris (Circle-D), the multi-disc were designed for that specific reason, WOT lock-up under abusive conditions.
This was on a customer's Vig2800 multi-disc with a factory trans. 
After the trans was rebuilt, it lock up instantly at WOT. 
After the trans was rebuilt, it lock up instantly at WOT. 