Grinding Noise While Backing Beaver Monterey Off Soft Ground

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Original Member Title: Busted Allison Tranny?
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The member asked whether a loud grinding noise and loss of movement while backing a 2006 Beaver Monterey from soft ground onto uneven hardtop likely damaged the Allison transmission or pointed to a driveshaft problem. Replies said the cause could be the transmission, driveshaft, differential, axle, U-joints, or possibly the torque converter, with several members leaning more toward an axle, driveshaft, or differential failure than the transmission based on the limited symptoms.

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Alexad99

Member
Joined
Apr 25, 2026
Posts
10
Location
New London
I just tried backing my 06 Beaver Monterey from soft ground onto hardtop (uneven ground) and got stuck, tried to accelerate through and RV stopped moving along with a loud grinding noise, Did I just fry the tranny, or is a drive shaft issue?
 
Whichever it is it’s probably going to be an expensive lesson.
I was already fully aware that it probably will be an expensive fix, I come onto these forums for advice from smarter people than me for guidance, not to be reminded that I just made a mistake or ran into some bad luck. If you have nothing to offer as far as technical advice, then PLEASE do not respond.
 
I just tried backing my 06 Beaver Monterey from soft ground onto hardtop (uneven ground) and got stuck, tried to accelerate through and RV stopped moving along with a loud grinding noise, Did I just fry the tranny, or is a drive shaft issue?

Might be a pig problem (The Pig is the nick name for the differential)

Might be the tranny.

Might be the drive shaft.

Might be something else

In any case.. $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

IF you have a warranty.. Read the fine print and call them.
 
Why aren't you not rolling under to take a look,??, jack one side up and rotate a rear wheel,, see if you have movement in any U joint >>>Dan
 
Did I just fry the tranny, or is a drive shaft issue?
Could you tell at all where the noise came from? While I'm not a transmission expert, I wouldn't think that it was the cause of a grinding noise but would lean toward the differential pinon gear, or possibly a broken axle. A search does suggest that the transmission could do that from the torque converter.

Unfortunately, I don't know of any way to be sure without the help of a good mechanic and probably a wrecker to move the RV.
 
This is a textbook example of varey little traction onto very good traction suddenly,, and it usually exerts more axel twist on one of the two axles,, the result is expensive and labor intensive..>>>Dan
 
My guess it’s was an axle or driveshaft. No way to really know with limited info we have.
 
Did you try moving it again? If it still makes the noise, have someone listen and try to figure out where the noise is coming from
 
I was already fully aware that it probably will be an expensive fix, I come onto these forums for advice from smarter people than me for guidance, not to be reminded that I just made a mistake or ran into some bad luck. If you have nothing to offer as far as technical advice, then PLEASE do not respond.
Ouch!
 

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