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1998 Ford F-150 trans or engine?

Tiny
LEADFOOT33
  • MEMBER
  • 1998 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 149,129 MILES
Okay I recently got this truck at a wicked deal. It acts like its got a bit of a miss when doing 50-70 up a hill when you are in like 4th gear I believe, almost like its tring to switch to 3rd but wont or somthing. Or its missing not sure. I did an injection service fuel filter plugs wires tried changing group coils. And when you are stopped and go to get on the gas its like somthing is hitting really hard. Like if you have somthing heavy in your box and it slides to the back of the truck and hits kind of a feeling. Does it most times not always. Is that the trans? I did a flush and filter in it aswell. I am running out of ideas for everything. I am not sure anymore if its missing or if its transmission. Please help
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Tuesday, November 18th, 2008 AT 5:43 PM

7 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

This could well be a transmission problem, I would get a transmission specialist to test and report on this for you as you really need to test drive this to help make a diagnosis.

Mark (mhpautos)
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Tuesday, November 18th, 2008 AT 5:46 PM
Tiny
LEADFOOT33
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  • 10 POSTS
Alright thank you. I was kinda figuring that considering after I took the trans pan off it was just black crap every where the magnet was just covered and teh fluid was definetly no better. Would it matter if the vehicle had a bit of a miss say like at an idle or while in gear when its up to temp at a stop light. Its not really a miss just a bit ya know kinda random shake ya can feel inyour seat. Like a miss. I dunno hard to describe
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Tuesday, November 18th, 2008 AT 6:13 PM
Tiny
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Hi there,

You will need to get the engine tune sorted after the transmission is repaired, if it is as bad I you describe, it will be slipping badly, and this can sometime feel as if it is an engine problem as well.

Mark (mhpautos)
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Tuesday, November 18th, 2008 AT 6:52 PM
Tiny
LEADFOOT33
  • MEMBER
  • 10 POSTS
So the transmission guy doesnt think its the tranny. Hethinks its an engine miss which it does feel like. He said the tranny shifts hard but I guess that is how those tranny are in those trucks he said. I am outta ideas on the engine miss now. I asked around and they were saying maybe crank sensor or cam sensor or a computer problem. And the clunk when I got on the gas turned out to be a u joint. So thats all good now. I just dont know what else to check on with the engine. Not much of a newer vehicle guy lol give me an old chevy and I fix it :P
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Monday, November 24th, 2008 AT 8:34 PM
Tiny
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  • 31,937 POSTS
Did you get a scan done as you don't always get a fault light showing with a fault code set.

Mark
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Monday, November 24th, 2008 AT 8:51 PM
Tiny
LEADFOOT33
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  • 10 POSTS
Not yet that is this week he is gonna hook it up to a scanner and go for a drive and try to get it to do the miss. And hopefully go from there
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Tuesday, November 25th, 2008 AT 5:36 PM
Tiny
LEADFOOT33
  • MEMBER
  • 10 POSTS
Okay so I hooked it up to a hole bunch of different scanners I could get my hands on nothign came up. I did coil packs which did a world of difference and even went away for a week now its only at 60 and hitting a hill. Outta ideas I was told maybe its got a standard trans. Computer in it. But I did do a hole byunch of towing with it and it never did it on the trip but as soon as I am in town doing 60 hit a hilll there it is again almost like a studder or like the timing is not getting advanced or somthing properly. Outta ideas? Please help thanks. And the clunck all it was was a bad ujoint in the back. Thanks again
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Monday, January 19th, 2009 AT 5:32 PM

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