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Teach Me: What makes a stall loose vs Tight

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Old 08-10-2009 | 11:26 PM
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Default Teach Me: What makes a stall loose vs Tight

Say you have two 3000 stalls from different companies. Ones tight ones loose. Why? What on the internals makes the difference.
Old 08-10-2009 | 11:30 PM
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stall to torque ratio. As more torque is applied the converter will "flash" higher.
www.Converter.cc has a perfect explanation of it.
Old 08-10-2009 | 11:32 PM
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We just had a thread exactly like this a couple weeks ago. I'm sure it would come up in a search in the first page.

Edit: didn't come up as easy as It should have.

https://www.performancetrucks.net/fo...d.php?t=444583

Last edited by viciousknid; 08-11-2009 at 12:12 AM.
Old 08-11-2009 | 08:05 AM
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Here are the results of some controlled tests that we did to better understand some of the variables when modifying converters.

http://www.transmissionspecialty.com...CTIP-05-07.pdf

http://www.transmissionspecialty.com...CTIP-06-07.pdf

http://www.transmissionspecialty.com...CTIP-07-07.pdf

http://www.transmissionspecialty.com...CTIP-08-07.pdf
Old 08-11-2009 | 11:00 AM
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EXACTLY what i wanted thanks Greg.
Old 08-11-2009 | 12:17 PM
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this is really good stuff! Wish someone had educated me before I put my stall in...tranny overheats when I drive thru steep country roads where ur always in and out of torque. u wanna use all that power to motor up the hills, but as u throttle up and down as u take uphill hairpins and corners the TC heats the whole works up! My stock Tundra and Chev dont end up to far behind...R/
Old 08-11-2009 | 12:20 PM
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Originally Posted by dhpro
this is really good stuff! Wish someone had educated me before I put my stall in...tranny overheats when I drive thru steep country roads where ur always in and out of torque. u wanna use all that power to motor up the hills, but as u throttle up and down as u take uphill hairpins and corners the TC heats the whole works up! My stock Tundra and Chev dont end up to far behind...R/
What trans cooler are you running?
Old 08-11-2009 | 12:31 PM
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QUOTE=00ChevyScott;4264899]What trans cooler are you running?[/QUOTE]

I'm about to upgrade from what is essentially an OEM unit, but space is the prob. U wanna keep constant airflow, even with a fan in a remote location. Pointless to sandwich it between the heat exchanger and rad, thot about just adding a second smaller one, but in line coolers aren't that efficient. tru-max are nice, but huge and only space wud be below the bumper where it wont get enuf flow unless I do major mods to the bumper. Seems I shuda just saved all the cash and hassle and stayed with a stock TC! I'm not a track guy. My driving is mostly road/hiway and terrorizing local Euro trash from stop sign to stop sign.
Old 08-11-2009 | 12:34 PM
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A bigger tranny cooler also has more surface area for the heat to radiate, so even if there isn't a ton of airflow, I'd say it would still drop you temps a considerable amount.
Old 08-11-2009 | 12:45 PM
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ur prob right...I have it at a tranny shop I trust and know finally (Dr Nicks in Milford, CT) and he'll sort it out for me. The guy doing the work is the local head of the Avvalanche Chapter - Trannyman. Doing a retune with BlackBear at the same time and it we'll see if we cant exorcise some gremlins! R/


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