I am getting a vibration when I lift off of the throttle and again when I press the throttle. Can anyone tell me what causes this. Also what is the normal operation of the 4x4 system is this a true all wheel drive system with a 2 speed t-case or is this the normal old control trac that I had in my 98 4.0.


Thanks
Nick

 

Can you describe the vibration better, such as if you feel it in the seats, the floor, and/or the steering wheel? Does it only happen over a certain speed range, or whenever you lift or apply the throttle? Is there a sound that seems to correlate with it? Does the vibration also occur if you shift to neutral and apply the throttle?

As for the operation of the system, that depends on which system you have. There is an AWD system and there is also a 4WD system used with Explorers. Do you have a **** to change the drive settings? What choices does the **** offer? If no means of changing the drive settings, then you have the AWD version.

-Rod

 

The vibration feels to be drive line as I can feel it in the seat there is no noise really. It seems to be more pronounced at highway speeds and it is when you lift off of the throttle and when you start feeding it throttle. It feel similar to driving over rumble strips and only lasts for a few seconds. I was wondering if ford had changed the old control trac in the manual it says auto is all wheel drive. I do have the selector on the dash.

Thanks
Nick

 

your **** probably says LO 4, HI 4, and AUTO.. YOu can lock it in 4 x 4 or you can let the computer choose when to do it. You can not put it in 2 x 4 and disconnect the front axle.

 

I'm not really sure what to suggest for that vibration. I think I'd start by carefully inspecting the transmission and engine mounts, then I'd probably plan to change the u-joints, transmission fluid and filter, rear differential fluid, and the transfer case fluid. The fluids are relatively easy the change and, if there is a gear issue, the fluid can provide an indication of a problem pretty quickly if it comes out gray or sparkly.

-Rod