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  #16  
Old 02-29-2012, 11:37 AM
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here's another question, when does your truck shift? Mine shifts at 4700 to 4800rpm? which is low compared to all the you tube videos ive been looking at????
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  #17  
Old 02-29-2012, 11:42 AM
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Well if i'm accelerating normally in town it shifts about 2k or 2.5k rpms or 30-40mph, a little higher if i'm on the gas. If i'm going slow under 30mph it shift about 2k rpms. Another note it is a much harder shift at higher rpms which is what i would expect, almost normal under 30mph.
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  #18  
Old 02-29-2012, 12:13 PM
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thats about right for normal driving, mine is a little rougher in the 2-3 all the time. And normal under WOT shifts, when does your truck shift during wide open throttle? I just posted about mine being low at 4700rpm when ever truck i drive or seen on you tube is at 5000 to 5100rpm shifts
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  #19  
Old 02-29-2012, 12:16 PM
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I don't know never had it at open throttle before, will try to do that today. We just got 6" of snow i'll try it this afternoon after its melts a bit.
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  #20  
Old 02-29-2012, 12:32 PM
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yea dont do anything that will make you crash your new truck! Im calling Sun Coast Transmissions now to speak to someone about that 2-3 shift valve
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  #21  
Old 04-08-2012, 10:00 AM
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thought id bring this thread backup, to the OP did you ever fix your 2-3 hard shift yet? Ive talked to two shops and i get the same answer, Fords autos suck you have almost 100k its time for a rebuild!
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  #22  
Old 02-28-2013, 09:58 AM
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Mine has a hard shift between 2-3 as well. So hard it feels like the truck got rear ended and the serpentine belt squeals. If I turn off my 5 Star it will slip slightly but not shift hard at all. I am pretty sure this is due to worn clutches and since the tune increases the line pressure it causes a harder shift to make up for the slipping. Pulling my tranny out tomorrow and doing a rebuild. I'm curious to see how bad my clutches are.
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  #23  
Old 03-04-2013, 11:19 AM
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http://www.ford-trucks.com/forums/12...-3+shift+4R100

Have a look at the second page on this thread. If the link doesn't work put hard 2-3 shift 4R100 into the search box and look for the link dated 1/22/13 by maxfam.
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  #24  
Old 10-17-2013, 06:43 PM
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I have a 03 fx4 super cab it down shifts hard I've changed the trans filter changed the plugs and wires truck has no leaks at all the hard shifting is driving me nuts
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  #25  
Old 10-17-2013, 07:01 PM
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Have it scanned for codes. And not at an auto parts store, they can't read the codes that you need.
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  #26  
Old 10-17-2013, 09:40 PM
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after fixing my trans issues and talking to Brian from BTS seems the 4R100 have alot of issues. Most of the time being a bad or broken shift spring, i installed a transgo shift kit and even though i didnt find a broken spring the transgo kit COMPLETELY fixed my weird shifting issues
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  #27  
Old 12-29-2013, 07:39 AM
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Quote:
Originally Posted by SuperDutyScaler View Post
after fixing my trans issues and talking to Brian from BTS seems the 4R100 have alot of issues. Most of the time being a bad or broken shift spring, i installed a transgo shift kit and even though i didnt find a broken spring the transgo kit COMPLETELY fixed my weird shifting issues
Mine will hard shift from second to third if I am accelerating but let off the gas before it shifts. How hard is it to install the transgo kit?
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Old 12-29-2013, 07:39 AM
 
 
 
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