Check for warped front rotors. under slight brake application it may not shake. But under hard braking such as getting off an offramp the truck will shake and the brake pedal may pulsate slightly. Chances are real good this is your problem.
it will shake uncontrolabley
Unbalanced front wheel.
On a Dodge truck, the vacuum switch is on the transfer case.On a Dodge truck, the vacuum switch is on the transfer case.
If it is while you are braking, the rotors or druma are warped.
You need to check your brakes and rotors. Typically when the rotors go out it will make any car/ truck do that.
i would like to know how hard is it to change the front hubs on a dodge truck?
Front passenger side
The Dodge Dakota pickup truck has CV joints on both front wheels. The pickup truck also has a driveshaft, as it is rear wheel drive.
Neither the front or rear bumper of a 1989 Chevrolet truck will fit on a 1989 Dodge truck. The bolt patterns are different and will not line up.
It is on the front of the throttle body.
Braking
Under the front passenger seat.