O/D Off or O/D on? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 8 Old 02-24-2009, 07:25 AM Thread Starter
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O/D Off or O/D on?

ok this might be a dumb question sorry but when your racing someone no matter if its from a stop or roll do you want your O/D OFF or On and why?thanks

2008 F350 4x4 Lariat CC SB 6.4 twin turbo diesel

Mods
Passenger side 3" MBRP intercooler pipe
S&B Cold air intake
CAT/DPF delete
SCT live wire IDP 5 tune package
EGR shut down
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post #2 of 8 Old 02-24-2009, 07:48 AM
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Didn't know I had a od switch though it was tow haul
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post #3 of 8 Old 02-24-2009, 10:20 PM
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it should be tow haul. but the difference between t/h and no t/h is that when the t/h is on the t.c. will lock up in 4th gear then straight to 5th gear locked up as compared to only locking up in 5th when t/h is off. i like to have tow haul on when i race but thats just my opinion

2007 F-250 Lariat 4x4
Juice Platinum w/ Attitude
CFM Largemouth Intake kit
EGR delete pipe
MBRP straight pipe turbo back exhaust w/ 5in tip
Smoke switch
Full length diamond plate running boards
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post #4 of 8 Old 02-24-2009, 10:34 PM
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On your guys's transmissions doesn't it also give it a little more line pressure for firmer shifts.

Early 99 Powerstroke
Crew Cab Short Bed Lariat 4x4
SCT Livewire w/ various custom tunes
AFE stage 2
Super 66 Turbo
4" straight pipe
Modded IDM
Automatic trans: PI Converter, tugger kit
Leveling Kit w/ 35's
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post #5 of 8 Old 02-24-2009, 10:48 PM
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Full throttle in tow/haul vs. no tow/haul feels the same so I just leave it off. The only time I notice a difference is when I'm cruising around and obviousy the engine braking.
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post #6 of 8 Old 02-24-2009, 10:49 PM
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Quote:
Originally Posted by FordCowboy View Post
On your guys's transmissions doesn't it also give it a little more line pressure for firmer shifts.
It all depends on the tune you have, most of the time the race tunes already have it programed so you are working against it. Just leave it alone and let the tune do what it was written for.



06 CCSB Lariat 102K
Factory 20s w/ Nitto Trail Grappler 35X12.5X20
Vegistroke 75,000 miles
2.5" Readylift Level
ARP Head Studs
EGR delete
Swamps 58V FICM
Isspro Gauges, EGT, Boost, Trans.
20ft of 4" straight pipe!!
SCT X3 BAMF Innovative Xtreme Race


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post #7 of 8 Old 02-24-2009, 10:50 PM
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Quote:
Originally Posted by FordCowboy View Post
On your guys's transmissions doesn't it also give it a little more line pressure for firmer shifts.
It all depends on the tune you have, most of the time the race tunes already have it programed so you are working against it. Just leave it alone and let the tune do what it was written for.

Plus I think the new electronic trans deal more in TC lockup vs, line pressure.....



06 CCSB Lariat 102K
Factory 20s w/ Nitto Trail Grappler 35X12.5X20
Vegistroke 75,000 miles
2.5" Readylift Level
ARP Head Studs
EGR delete
Swamps 58V FICM
Isspro Gauges, EGT, Boost, Trans.
20ft of 4" straight pipe!!
SCT X3 BAMF Innovative Xtreme Race


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post #8 of 8 Old 02-25-2009, 06:46 PM Thread Starter
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thanks guys Sorry its tow haul not O/D sorry about that

2008 F350 4x4 Lariat CC SB 6.4 twin turbo diesel

Mods
Passenger side 3" MBRP intercooler pipe
S&B Cold air intake
CAT/DPF delete
SCT live wire IDP 5 tune package
EGR shut down
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