Truck shakes on hard pull!

[Destutevil]

I have a 2002 Ram 3500 with HO 6 speed with limited-slip differential. When going up a mountain as the truck begins gain speed or about 2500 RPM'S the truck begins to shake, then it sounds like the back tires are bouncing on the highway. It does this in 4th & 5th gears. It has done this about 15 times. It will not do this on level even if you have you full thottle.



I pull 14,000 lb fifth wheel camper with 2400 lb hitch. Has anyone had this problem. This started when the truck 2000 miles.



Thanks for advise in advance

Destutev

 

[MidwestMotorman]

You might be seeing wheelhop. As the truck goes uphill, you lose weight upon the hitch. Going downhill you will gain weight. A rough road will contribute as will stiff springs. Out of round tires or improperly aired tires on a dually will cause a hop too.



Being the problem does not happen on the level, it would rule out a driveshaft balance or other common occurance.



Climbing empty means a truck will push harder. My 99 2500 will hop too. It can hop so bad as to chirp the rear tires while climbing. I have a limited slip, which I think contributes to the side to side shaking. Mine does not shake that bad, but again I have a two wheel rear and not a four wheel rear.

 

[tcourse]

Destutev

This is a question I think I asked in one of my first posts and never got a answer.

I only tow a 12' cargo trailer with 2 Harleys in it. When I'm pulling a grade out of overdrive at about 2500 rpm or above, I will

get a shake just like you describe. It almost felt like the front end was getting light and shaking side to side. When I back out of the throttle it will stop immediately.



Does this sound like your issue? Sure would like to know what it is. Glad to hear it's not just my truck doing it.

Mine is a 98. 5 Dually 4x4

If you want to compare notes call me at work 800-858-1505



Terry



You have hills in Kansas

 

[DennyDay]

Shake

Check your hitch weight - - might be a tad light



Denny

 

[tcourse]

Denny

Makes sense. Front of trailor catches a lot of air, going uphill, inertia of load toward rear. Yep, light on the tongue.



That was to easy, thanks Denny.



TC