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Old Jan 28, 2010 | 12:44 AM
  #1  
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acplowboy84
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Question Transmission Advice

I have a 2005 F-150 Larait 4X4. I am want to do some performance upgrades to the engine and was wandering how much horsepower I could get away with before destroying my transmission?
 
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Old Jan 28, 2010 | 07:52 AM
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l-m tech
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From: duncan oklahoma
the trans should be able to handle a max of 475 ft lbs of torque.with a good shift kit to increase line pressure.
 
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Old Jan 29, 2010 | 04:11 AM
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Thanks who makes good shift kits for these transmissions?
 
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Old Jan 30, 2010 | 01:15 AM
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There seems to be some debt on rather or not the 05 F150s have the 4R70E or the 4R75E transmission. The factory specs say my truck has the 4R70E transmission. If anyone could clear this up it would apperciated as I do not want to by the wrong shift kit and or parts for my transmission.
 
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Old Jan 30, 2010 | 01:39 PM
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From: Newport, Wa.
Originally Posted by acplowboy84
There seems to be some debt on rather or not the 05 F150s have the 4R70E or the 4R75E transmission. The factory specs say my truck has the 4R70E transmission. If anyone could clear this up it would apperciated as I do not want to by the wrong shift kit and or parts for my transmission.
Look for the label on your drivers door jamb or the door itself. The space marked 'TR' should show which one you have.
 
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Old Jan 31, 2010 | 08:43 PM
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Will the tag say 4R70E or the 4R75E?
 
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