Gearhead street tune - Ford Powerstroke Diesel Forum
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Old 02-06-2014, 05:21 AM
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Gearhead street tune

Well finally got truck finished up last night after four evenings of work doing the egr/dpf deletes. Took truck out for test drive and shifting is really harsh almost slamming in gear (trans was smooth as slick stock). Got on the hwy and gave truck about 3/4 throttle and "check air filter" popped up on the dash. I know these trucks need more air tuned, but I didn't think a street file would warrant a cold air intake.

I've got to haul some cattle this weekend and I'm concerned I may need to call gearhead and pay for their tow file because I'm not sure if I can get the load to where I'm going w/o caving in the stock air filter. I reset the air filter indicator thing on the air box and started truck, and msg was gone. I drove really easy going home and didn't get anymore air filter messages, but I honestly drove like an old man. I'm thinking I wasted money on this street file if I can't drive the truck. I don't have 300 in my budget right now for an intake.
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Old 02-06-2014, 05:34 AM
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Looks like shifting can be fixed with a relearn and/or adding 1/2qt of trans fluid. Any suggestions on towing with the street file and NOT having to buy a CAI? Matt told me the street file was good for about 10k lbs with "normal" driving. He didn't mention anything about an intake.
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Old 02-06-2014, 05:51 AM
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Buy an afe drop in filter or similar if you don't want to buy an intake at the time.

Also, traction bars help shifting dramatically, but if you got on it pretty good right after you installed the tune and your TCM learning had just been reset, then your trans thinks you are going to be driving aggressive and has firmed up the shifts. Everytime I load a tune, I drive like I will be driving daily. It will take around 50-100 miles to get pretty close to perfect shifting.

Last edited by WoodBoy; 02-06-2014 at 05:56 AM.
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Old 02-06-2014, 06:05 AM
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Well crap! LOL

So should I re tune the truck to reset the TCM again and then drive it normal? Or am I too late? I only drove it hard for about 10secs until that air filter warning came up. After that I drove about 30mins like an old gezzer.
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Old 02-06-2014, 06:07 AM
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The transmission will learn your driving habits with time if you didn't do the relearn. I never do the relearn when I change tunes. And yes traction bars make a world of difference.
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Old 02-06-2014, 06:51 AM
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Local oreilly's has an K&N filter, I'll use it since I'm kinda in a time crunch and really don't want to buy another tune. I'm not a K&N fan but it will do for now, I don't drive in dusty conditions anyway. Next payday I'll splurge for the S&B system.
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Old 02-06-2014, 07:57 AM
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i bought a k/n from everything aftermarket for 63 bucks aslo it is recommened to change out the stock filter wtih a larger tune..
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Old 02-06-2014, 09:18 AM
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All I did was put in a Airaid drop in filter with the filter box top removed an I use the RCD 425 tune, at the the shifting was firm but like said before it will become smooth.
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Old 02-06-2014, 10:27 AM
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For the tranny, it will relearn on its own in about 200 miles +/-. As for the CAI, it would be a good idea to budget for one in the future, but for now you can get with using a drop in filter. However, I would stay away from the K&N filters. They are not a good choice for diesels when it comes to filtration. Also, you can drill some holes in the stock lid to get some extra air going in there.

Good Luck!
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Old 02-11-2014, 05:09 AM
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Put about 198miles on truck this weekend and trans still doesn't shift right to me. It almost acts like its hunting for gears at slow speeds (25-35mph). Lock up in 5th is pretty harsh as well when not driving hard. I'm going to contact Matt, so far I'm not happy with the shifting.
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