Question about 1994 Ford Ranger Supercab

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Sorta sharp shaking vibration in 1994 ford ranger

I cant drive faster than 30 first happen when I was going 55 on highway. very hard, shaking vibration seemed to be coming from rear wheels. sounded like something was locking up. now any movement of truck has constant jerking motion emanating from somewhere underneath and to the rear.

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  • Ford Master
  • 78,936 Answers

It sounds like an ignition problem. I need to know if you have scanned the computer for fault codes?

Posted on Feb 14, 2014


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Posted on Jan 02, 2017

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SOURCE: Front End noise and vibration

Check the U-joints and axle baerings. But its most likely because the truck is in four wheel drive.

Posted on Oct 22, 2008

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SOURCE: 2002 Ford Explorer Jerking when in motion

Does the jerking feel like a fish bite ( especially when pulling a hill?) if so it may need plugs and wires

if you have one bad plug wire the problem seems to smooth out at higher speeds

Hope this helps

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SOURCE: 1999 ford ranger 4x4 no 4 wheel drive

solenoid on back of transfer case is defective or no power to it /12 volts

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SOURCE: ford super duty vibration/shake

The carrier bearing should not move at all. It is mounted in rubber to give a little. But, it should not move freely. If this is the case then something has gone bad. The carrier bearing would cause this vibration as it spins if it is loose.

Posted on Mar 16, 2009

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SOURCE: I have a 99 expedition and I have a bumping sound

I am a retired Ford dealer technicain and have seen this exact symptom many times, the front differential does not cause this, the Transfer Case clutch does cause it, you most likely had a remanufactured Transfer Case installed, as seldom if ever is a new one used due to the cost.
My first suggestion is have the fluid in the case changed and have them add a bottle of of friction modifier (commonly used in Limited Slip Differentials), it should be done every 30,000 miles, the transfer case uses Ford ATF and it is easy to do the service yourself.

Service the Transfer case:

  • Elevate the Expidition with a jack or tire ramps, if you're unable to comfortably crawl underneath it. If you're using a jack, make sure the truck is secure on jack stands before working under it.

  • Locate the "fill" plug on the rear of the transfer case to the left of the drive shaft. Unscrew the fill plug with a 1 1/8-inch hex socket wrench.

  • Use your finger to check if the fluid is below the bottom of the fill hole. If it is, you need to add fluid.

  • Drain the fluid, instead of refilling it, if it's been more than 30,000 miles since it was last changed in your Ford truck. Place a drain pan under the transfer case "drain" plug before removing the plug with the socket wrench.

  • Replace the drain plug after the fluid has completely drained or the flow has slowed to a trickle into the drain pan.

  • Refill the transfer case through the fill opening with approximately 2 quarts Motorcraft Mercon automatic transmission fluid plus a 1/2 bottle of Friction Modifier (Any brand will work, Stalube makes it in a tube, add 1/2 tube) using a funnel or pump. Replace the fill plug.

  • If this doesn't resolve the Transfer Case clutch chatter you will need the unit repaired.

    Posted on Nov 18, 2010

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