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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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  #1  
Old 08-01-2011, 11:35 PM
Ecarlton1991 Ecarlton1991 is offline
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1991 Ford F150 shifting problems

Hey my truck has a 351w and it shifts extremely hard while going only about 10-15 mph otherwise it shifts completely fine. it also seems like its shifting late, i know thats not very much detail at all but anyone having the same problem or can help?
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Old 08-02-2011, 08:10 AM
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rla2005 rla2005 is offline
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Late hard shifts usually indicate the transmission may be in "limp mode". Try checking for codes before throwing money at the problem. If your truck has an E4OD transmission it is 100% electronic controlled. If you have an AOD you may need to adjust the TV cable.
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Old 08-02-2011, 09:35 AM
Ecarlton1991 Ecarlton1991 is offline
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how do i determine what transmission i have?
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Old 08-02-2011, 11:31 AM
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Look at the Door Jamb sticker if it is still on the truck. Use this for reference: Ford Door Sticker Decoder .: Articles

If you have a transmission code "E" you have an E4OD. If it is Trans. Code "T" you have an AOD. Yes I realize the decoder says Trans. Code "T" is listed as 4 speed automatic for a Ranger, but my Ford Service Manual states that T is an AOD in F-series trucks.

If the door jamb stick is gone you can refer to this: Ford Transmission Spotter's Guide .: Articles

I also see you previously stated your truck had a 351W, that by default should make your transmission an E4OD.
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Old 08-02-2011, 07:15 PM
Ecarlton1991 Ecarlton1991 is offline
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okay i have confirmed that my transmission is an E4OD. would rough idling and the shifting problem be from the same thing or do you think they would be completely different problems?
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Old 08-02-2011, 09:41 PM
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Most likely different issues. Check for codes before replacing any parts.
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Old 08-02-2011, 11:49 PM
Ecarlton1991 Ecarlton1991 is offline
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do places like Auto Zone check your codes or where do i go to get that done?
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Old 08-03-2011, 02:14 AM
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Quote:
Originally Posted by Ecarlton1991 View Post
do places like Auto Zone check your codes or where do i go to get that done?

Warm up the engine and transmission then do this: Ford Fuel Injection » How To Run a Self-Test

or purchase one of these: Amazon.com: Equus 3145 Ford Digital Code Reader: Automotive
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Old 08-04-2011, 07:15 PM
Ecarlton1991 Ecarlton1991 is offline
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sweet thanks a lot is that link you sent me to Amazon.com an exact digital code reader model that will work for my truck?
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Old 08-05-2011, 08:09 AM
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Quote:
Originally Posted by Ecarlton1991 View Post
sweet thanks a lot is that link you sent me to Amazon.com an exact digital code reader model that will work for my truck?
Yes indeed. Many on this forum have one, including me.
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Old 08-05-2011, 07:16 PM
Ecarlton1991 Ecarlton1991 is offline
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awesome thanks for the help i will be ordering one soon!! know anything about B&M shift improver kits?
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Old 08-05-2011, 07:16 PM
 
 
 
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150, 1991, 1992, 49, 91, f150, ford, hard, late, overdrive, problems, rough, shifting, shifts, transmission

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