6.0 locking torq convertor - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 06-04-2012, 09:32 AM Thread Starter
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6.0 locking torq convertor

what does it actually do? and why do u want it too do it ? im about too buy a tune for towing what gears should i have it lock up?

Last edited by jordan07; 06-04-2012 at 07:46 PM.
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post #2 of 14 Old 06-04-2012, 10:48 AM
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post #3 of 14 Old 06-04-2012, 11:04 AM
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Locking the torque converter transfers the power to the ground more effeciently then with it unlocked! But you don't need it lock up too early unless your at the drag strip... Just get a tune from whoever with their normal TC lock... (around 50mph IIRC) not the early one and see for yourself, then maybe have them tweak it to have the early TC lock in their and you will see the difference for yourself! Everyone is different!

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post #4 of 14 Old 06-04-2012, 02:59 PM
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The torque conerter lock is exactly that, the TC locks and there is no slippage, a direct connection between the flexplate and front pump. Kinda like a clutch in a manual transmission. This is a great feature because you loose about 200 rpm with the lock up at lower speeds. More at higher engine speeds.

I have a tune that locks the converter early and I don't like it. Over 2000 rpm when the converter locks makes a turbo fart and a huge cloud of smoke if you are on a freeway on ramp trying to get up to speed. Ultimately I get pissed, hammer it, and the truck shifts 'normal'. Its either putt like a gram'ma or hammer down.

Normal TC lockup should occur at 45mph and light throttle pressure. More throttle, the later the lock. This actually feels like a 5th shift event.

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post #5 of 14 Old 06-04-2012, 04:15 PM
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Quote:
Originally Posted by Karls03 View Post
The torque conerter lock is exactly that, the TC locks and there is no slippage, a direct connection between the flexplate and front pump. Kinda like a clutch in a manual transmission. This is a great feature because you loose about 200 rpm with the lock up at lower speeds. More at higher engine speeds.

I have a tune that locks the converter early and I don't like it. Over 2000 rpm when the converter locks makes a turbo fart and a huge cloud of smoke if you are on a freeway on ramp trying to get up to speed. Ultimately I get pissed, hammer it, and the truck shifts 'normal'. Its either putt like a gram'ma or hammer down.

Normal TC lockup should occur at 45mph and light throttle pressure. More throttle, the later the lock. This actually feels like a 5th shift event.
I've read some of the tunes offered lock the converter in 1, 2 and 3 along with a Jake brake function if you want it. So would this be locked in 1 at about 45 mph and stay locked in 2 and 3 or would it be normal after shifting and lockup again at a pre determined RPM in 2 and 3?


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post #6 of 14 Old 06-04-2012, 04:28 PM
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Locking in 1st is a bad idea I believe. Not enough fluid flow or something to that effect.
The jake function is actually a turbo brake.



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post #7 of 14 Old 06-04-2012, 04:29 PM
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Quote:
Originally Posted by dee004 View Post
I've read some of the tunes offered lock the converter in 1, 2 and 3 along with a Jake brake function if you want it. So would this be locked in 1 at about 45 mph and stay locked in 2 and 3 or would it be normal after shifting and lockup again at a pre determined RPM in 2 and 3?
I've only seen the real aggressive tunes lock in 2nd gear and it's for hauling a$$, not mpg. My tune that locks the converter does it at 42 mph indicated. (45 mph actual). Sounded good on paper, but it lugs the motor if you're not driving like a gram'ma.

Not sure what you mean by Jake brake function because the only Jake brake I know of cuts fuel to cylinders to help stopping power (big rigs). An exhaust brake will help maintain speed going down hill w/out needing as much brake pedal input.
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post #8 of 14 Old 06-04-2012, 04:30 PM
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pretty sure the tuning wont even command to lock the converter in first gear, no matter what, so its not even possible.
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post #9 of 14 Old 06-04-2012, 04:38 PM
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Quote:
Originally Posted by Karls03 View Post
I've only seen the real aggressive tunes lock in 2nd gear and it's for hauling a$$, not mpg. My tune that locks the converter does it at 42 mph indicated. (45 mph actual). Sounded good on paper, but it lugs the motor if you're not driving like a gram'ma.

Not sure what you mean by Jake brake function because the only Jake brake I know of cuts fuel to cylinders to help stopping power (big rigs). An exhaust brake will help maintain speed going down hill w/out needing as much brake pedal input.
The jake brake function should really be called turbo brake as jsilvas mentioned. It commands the vanes of the VGT to increase exhaust back pressure to aid in braking using the exhaust back pressure.


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post #10 of 14 Old 06-04-2012, 05:13 PM
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Quote:
Originally Posted by Karls03 View Post
I've only seen the real aggressive tunes lock in 2nd gear and it's for hauling a$$, not mpg. My tune that locks the converter does it at 42 mph indicated. (45 mph actual). Sounded good on paper, but it lugs the motor if you're not driving like a gram'ma.

Not sure what you mean by Jake brake function because the only Jake brake I know of cuts fuel to cylinders to help stopping power (big rigs). An exhaust brake will help maintain speed going down hill w/out needing as much brake pedal input.
Quote:
Originally Posted by pizza pig View Post
pretty sure the tuning wont even command to lock the converter in first gear, no matter what, so its not even possible.
When does the converter lock in stock configuration? Is the converter locked when in overdrive?


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