A few months back my truck, 2001 F150 xcab 4.6L V8, started having a hesitation and then a jerk. It would happen when ever I was driving and let off the gas slightly and then pressed back down on the gas. If I press down hard then it doesn't do it. After a few days of doing this only a couple of times I thought that my problem was going away, but seems I was wrong as it is still doing it and more often now. Well now I have noticed a similar hesitation and jerk from a dead stop.

I know there are a lot of things that this could be: diff, tranny, clogged fuel line, plugs, etc.... Instead of throwing money at it (that I don't have) was curious if now that it is doing it at a dead stop points to something specific? I may run down to Autozone and see if any codes have been thrown that have not tripped the CEL.

 

Also wanted to add that my RPM's do NOT jump up or down when I get the hesitation and jerk. If that helps any.

 

AZone can't read tranny codes with the scanner they have. If you have a tranny code the O/D light on your gear selector will be flashing. Go buy a tranny shop and have them take a look too.

 

hey torkum is the o/d light flashing when there is a code apply to all ford o/d trannys or just certain models???

 

I think its part of the OBD II system so might have started in 95', not really sure. If I get a chance latter I'll look it up in the Powertrain Controll Manuals.

 

It applies to all Ford transmissions that have an overdrive cancel light and button.

 

I have the same problem, and i had the truck in 3 times so far for the same issue. I had them check the engine mounts, tranny mount, and driveshaft...they replaced the drive shaft, but only reduced the problem slightly....i am thinking the syncros in the transmission, but i do not know much beyond that. I am going to take my truck in again, and hopefully they can fix it this time.

 

Yes I have the overdrive button on my gear selector but it is not flashing and seems to be working correctly (as far as taking it out of overdrive). So would a transmission slip throw a code? Or is this one of those gray areas?

 

Transmission slip will set a code, but it has to slip for a while before the code sets.

 

By "slip for a while" do you mean slip several times while driving or one slip for an extended lenth of time? I guess my problem is going on 2-3 months of the hesitation and jerk so what ever is causing it, it has done it a lot. I guess the longest it has done any given one time was for say 3-4 seconds.

 

clean your air filter.

 

Air filter is a K&N, just the drop in replacement one. It has about 12k miles on it and has not been cleaned. I can definitly clean it and/or throw a new regular paper filter in to see if that makes a difference.

 

my truck has been doing the same you described. I have an '05 with only 8,000 miles on it. It has also done some weird thing while starting a few times. It cranks then dies and stutters a bit. The transmission seems to make the slip and bumping noise from 2nd gear if i come to a rolling stop then take off i will e taking to the stealership soon

 

My 2001 F-150 Supercrew does the same. Also, at slow acceleration and right about 55 MPH there is a vibration during the shift...almost like I'm driving over a rumble strip. Have you experienced this?

 

I have not really noticed this but I can pay closer attention to see if I am getting this as well.

Have you checked the balance on your tires? Or does your issue at 55mph seem more like it is from the transmission? I had a Jeep Cherokee that I had 2 new tires put on the front of it. When I drove it home when ever I got up to in between 60mph-65mph it felt like the hole darn Jeep was going to come apart. Below 60 and above 65 was fine. I took it back in and they said they "forgot" to balance one of the tires.