'99 & up 7.3L Power Stroke Engine and DrivetrainDiscussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
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I am thinking about putting in a lock up switch and I would like some feed back from others.
First off does it still lock up the same as when the onboard computer tells it to. <font color="blue"> Only if you don't turn it on before that. It will lock when you throw the switch. I usually wait for the PCM to lock it up and then throw the switch to keep it locked.
I know that you shouldn't use it at low rpm, but what other problems come with it. <font color="blue"> You just have to remember to turn it off at about 1000-1200 RPMs when coming to a stop.
Do you let out of the gas when you are locking it up. <font color="blue"> I always do so that it locks smooth instead of slamming into lock. </font>
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Hope this helps, Joe
2002 F350, Crew Cab, 4WD, ISSOPRO Gauges,
3.73, Auto, 2wd low range mod, No door dinger,
Interior lights off switch, Zoodad Mod,
Extra Trans Cooler, Before coolers trans fltr,
Coolant fltr, Crimestopper remote start/alarm
Oil Guard Bypass, Air horns
I have one fitted and use it mainly when I am below 75-80 KMPH where the PCM will lock it up anyway.
Use it for slow speed work on bush tracks etc where if used as supplied the convertor is creating a lot of heat slipping.I ease of on the go pedal when engaging and you need to always unlock it. It will stall the motor if not unlocked and is embarrasing.
2000 F350 king cab 4x4,No engine mods,Roo Bar,Headlight and bonnet stone protectors,Inlet snorkel,flares on front,Engine driven air compressor and receiver,Hot water tap,tyre temp and pressure monitor,95 ltr fuel tank under right hand side,aluninium side steps,flat trayback,50ltr water tank under left hand side,heavy wired front and back for 4500lb electric winch, Bilnstien shocks,converted to right hand drive,battery conditioner,electric trailer brakes,heavy duty tow bar,synthetic oil in tranny,extra tranny coolerand filter ,tranny temp & pyro,
Ride-Rite airbags all round.Full flow muffler outlet at rear of vehicle.Engine breather mod.HHO generator
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Lets say I have it locked up in second gear and its going to change into third gear soon, do you just leave the lock up switch on or should I turn it off.
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Matt, once your rolling you can flip the switch in first gear if you really wanted to. It will shift normally right on up through the gears. When its locked and you begin coming to a stop, thats when youll have a problem. If you forget to unlock it at very slow speeds it will buck like a bull and probably stall the engine. This of it like a manual trans at a stop light. If you dont step on the clutch to disengage it will kill the engine. Pretty much the same with the TC.
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