purpose of the TC Lockup? - Ford Powerstroke Diesel Forum
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post #1 of 23 Old 03-10-2008, 09:53 PM Thread Starter
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purpose of the TC Lockup?

Ive seen this mod quit a bit and was wondering its purpose. Thanks.

2001 Ford F250 4x4 Crew Cab Long Box
8" Fabtec Lift
Dual Front ProComp Shocks
Rancho Steering Stabilizer
355/70 R17 Toyo AT
2" Wheel Spacers
4" Stainless Steal Exhaust
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post #2 of 23 Old 03-10-2008, 10:11 PM
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i think it is to get all the power to the ground and gas mileage

early 99 f-350 7.3 6speed crew cab
banks exhaust, chip, big head, exhaust houseing
and wheel
Ford AIS intake
5.5" fabtech lift w/ 35x12.50/18's
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post #3 of 23 Old 03-10-2008, 10:25 PM Thread Starter
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does it have any negative effects on the trans?

2001 Ford F250 4x4 Crew Cab Long Box
8" Fabtec Lift
Dual Front ProComp Shocks
Rancho Steering Stabilizer
355/70 R17 Toyo AT
2" Wheel Spacers
4" Stainless Steal Exhaust
AFE Stage 1 Intake
10K MOD (4.7k version)
Foil Delete
DIY OBS FPR Shim
Bed Lined Rocker Panels W Pinstripes
Tinted Windows
Leather

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post #4 of 23 Old 03-10-2008, 10:30 PM Thread Starter
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Just curious on how it works and why its done.

2001 Ford F250 4x4 Crew Cab Long Box
8" Fabtec Lift
Dual Front ProComp Shocks
Rancho Steering Stabilizer
355/70 R17 Toyo AT
2" Wheel Spacers
4" Stainless Steal Exhaust
AFE Stage 1 Intake
10K MOD (4.7k version)
Foil Delete
DIY OBS FPR Shim
Bed Lined Rocker Panels W Pinstripes
Tinted Windows
Leather

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post #5 of 23 Old 03-10-2008, 10:39 PM
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as long as you know how to use it i dont think it hurts anthing...but never had one

early 99 f-350 7.3 6speed crew cab
banks exhaust, chip, big head, exhaust houseing
and wheel
Ford AIS intake
5.5" fabtech lift w/ 35x12.50/18's
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post #6 of 23 Old 03-10-2008, 10:53 PM
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Helped father in law put one in today to work with exhaust brake. It didn't work as expected so we are checking the wiring tomorrow during the daylight.

01 LWB CC SRW 4x4 7.3 auto
Stage II's,HPX, In tank and pre-pump mods,regulated return
AFE stage II,Garrett BB Turbo,4" turbo back, ITP overboost annihilator, 10 pos. DP Tuner,
Motor and tranny rebuilt. forged rods,Mahle pistons, all balanced, new valves,Comp 910's,C/M P-rods,ARP Studs , homemade AIH delete kit, twin TRU-Cool tranny coolers,Ride-Rite air bags B-D X-Monitor
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post #7 of 23 Old 03-10-2008, 11:11 PM
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keeps the t/c locked manually when your driving around the foothills or going up steep grades at 25mph when the t/c isnt locked. when it isnt locked its generating heat, heat kills automatic transmissions. when you're towing and going up steep grades slowly, its gonna heat up exponentially, frying your trans eventually.

all you do is tap into the t/c wire and put a switch with a ground wire and another wire to the tap. don't cut the wire unless you plan on making a guzzle type t/c lockup mod.
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post #8 of 23 Old 03-10-2008, 11:34 PM
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if you have it locked and stop isnt it gonna stall, like not pushing the clutch in?

early 99 f-350 7.3 6speed crew cab
banks exhaust, chip, big head, exhaust houseing
and wheel
Ford AIS intake
5.5" fabtech lift w/ 35x12.50/18's
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post #9 of 23 Old 03-10-2008, 11:41 PM
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Yes it will.

01 LWB CC SRW 4x4 7.3 auto
Stage II's,HPX, In tank and pre-pump mods,regulated return
AFE stage II,Garrett BB Turbo,4" turbo back, ITP overboost annihilator, 10 pos. DP Tuner,
Motor and tranny rebuilt. forged rods,Mahle pistons, all balanced, new valves,Comp 910's,C/M P-rods,ARP Studs , homemade AIH delete kit, twin TRU-Cool tranny coolers,Ride-Rite air bags B-D X-Monitor
Don't worry about the Mule, just load the wagon.
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post #10 of 23 Old 03-11-2008, 12:28 AM
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So you can lock the t/c out of OD. I thought you had to be in 4th(at least 40mph) for it to lock?

2000 F250 XLT SC 4x4
4" T-back MBRP 5" Tip--Quad Commander--DIY Intake--Foil Delete--Zoodad--AIH Delete--CCV Mod--Wastegate Disconnected--Drilled & Slotted Rotors--Smoked Headlights/Corners--OEM Alum. Diff upgrade--TW Tuned--WW/EBPV delete--RECON White Lightning

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