GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

Locking up sooner

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Old Dec 8, 2008 | 09:43 PM
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Default Locking up sooner

My truck with the stock converter is a dog when I stab the throttle and the TC unlocks. It almost slows down when a roll on it because it starts to pull great with the tc locked then it unlocks with more load. Can the stock TC handle lockup when i give the throttle a stab or should I go to a PI 2400 10.5" tripple disc or maybe a yank tt2600?
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Old Dec 8, 2008 | 09:44 PM
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How big is the converter???
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Old Dec 8, 2008 | 09:45 PM
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the stock one... i dunno what ever comes with the 4l65?
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Old Dec 8, 2008 | 09:53 PM
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The stock converter clutch was not designed to handle WOT lockup additionally if lockup remain on during a downshift or upshift you may be risking serious damage to the trans (broken parts)
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Old Dec 8, 2008 | 09:54 PM
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I'm not even going wot.. I'm just goin like 60% TPS and it unlocks
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Old Dec 8, 2008 | 09:59 PM
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mine pulls better with the converter unlocked at partial throttle. Locking the converter and going into boost I just lug too much unless my rpms are over 3K.
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Old Dec 8, 2008 | 10:17 PM
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Originally Posted by trever1t
mine pulls better with the converter unlocked at partial throttle. Locking the converter and going into boost I just lug too much unless my rpms are over 3K.
Yea, you need a turbo if you want to make any good power below 3k
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Old Dec 8, 2008 | 10:25 PM
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Originally Posted by PSM
I'm not even going wot.. I'm just goin like 60% TPS and it unlocks
I am sure you can have the tuning changed to allow more throttle without unlocking , However if a down shift occurs with the converter locked you will place and enormous amount of strain on the trans hard parts.
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Old Dec 8, 2008 | 10:27 PM
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(reffering to Wilde's comment) no smartass. When I am in tcc lock, say 2000 rpms and I roll on the boost to ~6lbs it just feels wrong, like I am in the wrong gear and lugging. The meth is really turned up right now and I am running extremely rich at partial throttle (10.2-10.4) in boost. I m sure that is not helping.

As far as a downshift occuring when locked, his settings should be to not allow that to occur, that is the converter cannot remain locked during a shift.
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Old Dec 8, 2008 | 11:10 PM
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With stock tuning these truck TCC's do lock at WOT, the 80e's lock in 2nd gear and the 60e/65e's lock at WOT over 75-85mph in 3rd gear.

The stock tunes lock the TCC during shifts? At least to the stock truck tunes I just looked at

peace
Hog
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