There is 2 pieces to the driveshaft, I'm not sure that the driveshaft is the issue since it is free wheeling most of the time and isn't sending alot of power especially to the rear wheels when driving on dry surfaces.

 

It throws power to the rear wheels under acceleration

 

I would be more inclined to think you might have something going on with your cv axles in the front.

 

I have exactly the same issue. Drive shaft, CV joints all checked and were fine. UJ's look OK and it only happens under acceleration and you can feel it through the whole car so it's pretty hard to pin down.

 

Any clues to what fixed this problem? I’m having the same problem

 

Check your owners manual it will list the fuses and numbers, the fuse box is to the front right of the engine bay, black box.

 

Thanks for your support.
I just pulled both abs fuses out of the fuse box just to make sure (fuse #34 & #35). I tried without the green one and then without the pink one. And then without both. ABS light came on as well as 4WD! and ESP BAS light.

In the end vibrations are still there. So no difference what so ever.

Something to bear in mind.
The car only vibrates at full acceleration. The whole car chassis vibrates but doesn't shake. I feel it in my spine and under my feet. When in neutral gear no vibrations.
When accelerating vibrations kick in and then disappear as RPM go higher.
For example: I'm driving in 4th gear and vibrations kick in 2200 rpm until 2700rpm and then disappear. So between 70 km/h and 85 km/h. Same with the 5th and 6th gear engaged between 2200 and 2700rpm.

Does this mean that I should rule out the rear train as well as the drive shaft?

 

For some reason, pulling fuse #34 caused a no-start for me. instead I pulled #2 and that rendered me fwd. Been driving like that for about 6 months since my rear diff likes to clunk...

 

Hi, so pulling fuse #2 disengages the rear drive? I've been trying to figure how to do that since two mechanics say I need a new rear differential but can't afford right now...

 

Hi all, has anyone determined the cause of the OPs issue yet? I have a 07 2.0 CRD patriot with manual gearbox and I get the same weird vibration around 60 - 70 km/h and then goes away one exceeded of if not accelerating. I've had somebody look at it suggesting engine mounts but that doesn't seem to likely given there isn't much play in them and my PAT only has 130,000kms on it (about 75,000 miles). Any ideas what to look at here? Thanks

 

Fuse #2 provides power to the AWD control module, so removing it would keep the electric clutch from engaging and supplying power from the PTU to the rear differential, however the rear axles will still be connected to the rear diff gears so the assembly will still turn as you drive it.

 

Oh ok thanks, so would be pointless....don't suppose I can disconnect the axles from the diff? Already sounds foolish tho...best bet to find a RD from a pick n pull and diy replace?

 

Anyone found a solution?

 

How about the rear diff bushings? The awd system is programmed to send power to the rear under heavy acceleration to aid in strait line stability.

 

Hello there , my 07 patriot Crd does the same thing,it vibrates under acceleration doesn't matter in what gear it is. But only between 2200 and 2600 RPM,then it stops. Any ideas?

 

Make sure all 4 tires have the same air pressure and try again.

 

Consider U-joints, too. Much more likely than a drive shaft. Drive along at 30MPH with the window down and listen for a tap on acceleration or deceleration.

 

Will have a look at that, thank you!

 

Thank you! Will check that!