Locking the T/C - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 8 (permalink) Old 11-23-2009, 02:19 AM Thread Starter
DJM
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Locking the T/C

Ok so this is my first Automatic ever had the truck since 02 and i always see stuff about locking the T/C is this just a towing thing or would it benifit from not towing prety much what does this do?
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post #2 of 8 (permalink) Old 11-24-2009, 02:01 PM
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Re: Locking the T/C

Torque Converter lock-up. It's when engine speed matches the turbine (input) speed. A stator inside the torque converter sends fluid out of the space between the turbine and a friction clutch, thus providing lock-up.

It is in all vehicles. This happens in 4th/5th gear or Overdrive.

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post #3 of 8 (permalink) Old 11-24-2009, 03:44 PM
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Re: Locking the T/C

With locking the TC up manually it stops the sliping of the clutches in the TC and puts the power directly though it. this will also keep trans temps down. I used to have a TC lockup switch on my truck when I had the auto.

But with some good tuning the TC lockup switch isnt needed because it will lock the TC for you when it needs to be locked.

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post #4 of 8 (permalink) Old 11-24-2009, 05:43 PM
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Re: Locking the T/C

Quote:
Originally Posted by big_stroker View Post
With locking the TC up manually it stops the sliping of the FLUID COUPLING in the TC and puts the power directly though it. this will also keep trans temps down. I used to have a TC lockup switch on my truck when I had the auto.

But with some good tuning the TC lockup switch isnt needed because it will lock the TC for you when it needs to be locked.
Fixed it for ya....

Better hope the clutch in the torque converter isn't slipping.

Cody
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post #5 of 8 (permalink) Old 11-24-2009, 05:47 PM
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Re: Locking the T/C

Quote:
Originally Posted by cleatus12r View Post
Fixed it for ya....

Better hope the clutch in the torque converter isn't slipping.
Learn something new every day.

I wasn't sure exactly how the inside of the TC worked. I just knew the concept

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post #6 of 8 (permalink) Old 11-25-2009, 06:41 PM Thread Starter
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Re: Locking the T/C

Ahh thanks for clearing that all up I always wondered what everyone was talking about when they had T/C lockup switches.
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post #7 of 8 (permalink) Old 11-25-2009, 10:29 PM
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Re: Locking the T/C

I primarily use it when sled pulling or when I want to load the turbo in 1st or 2nd gear. It's best to do it above 1600rpm though so you have proper line pressure.

OBS trucks lockup at the 2-3 shift or in 3rd gear. Some SD's don't lock until OD.

Dave

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post #8 of 8 (permalink) Old 12-04-2009, 08:05 PM
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Re: Locking the T/C

dptuner & jw valve body keeps mine locked with brake applied until 25 mph all gears. Best setup I've ever had.

Glen
early99 f350 cc, lb, 2wd, drw, A pillar autometer guages, CTS monitor, AIS intake, 4" turbo back cat delete diamondeye exhaust, dptuner, pmt1, jw vb, Swamps ab inj, Adrenaline oil, Coolingmist, 180*T, Trucool cooler, spin on trans filter, Firestone air bags, 2" frt leveling kit, now chased by a 34' toyhauler
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