rear end shudder

[solsir4]

When i take off from a dead stop and crank the wheel all the way to the left or right and take off faster than anything other than rolling away , the rear shudders , and makes a disturbing noise . It is a little hard to explain in writing but it feels like tire hop but thats not it , i am thinking something in the u joint , or the driveshaft may be making it from loose leaf springs moving when under torque ? It does not happen when i go straight only when i am turning all the way and hitting the throttle ... has anyone experienced this problem ?

 

[dragon]

is this lowered? did you do a rear diff service? is this a qc or rc?

 

[mopower1958]

Sounds like you need to add some limited slip additive. The clutches in the rear end are chattering.

 

[JTS VENOM PERFORMANCE]

almost sounds like the clutches in the differential

after checking everything try servicing the rear axle

 

[solsir4]

05 qc , i did just have the thirty thousand mile service performed ...

 

[dragon]

o make sure that they added the limited slip addidive. that will do it and it will do damage if it is not put in there.

 

[solsir4]

how can i make sure they added the limited slip additive ? I just called and they said the guy would have ... i am going to give the tech a ride later today to replicate the symptom for him ...

 

[dragon]

is the limited slip additive on your bill from the shop? how long ago was the diff service done?

 

[solsir4]

there is nothing that says anything about limited slip additive on the bill , it says atf fluid ... the service was done about two weeks ago ...

 

[dragon]

well ATF is not the fluid that should be in your truck. are you at a point and do you know the diffrence in fluid? if you can open the drain plug and let a little seep out to tell if it is ATF or diff fluid. ATF in most cases is pink, diff fluid is more an oil color and smells very stong.

i would stop driving untell you figure this out. your truck from the factory will have 80w90 about 3 to 3 1/2 gear oil and 1 limited slip (4318060ab) additive.

 

[silverqc]

my 05 qc at 30 was doing the exact same thing service the diff and mine was all smoooth again

 

[solsir4]

vtcoa has some smart members . I took it in today and gave the tech a ride , he said immediatly that it is a lack of differential fluid . Dragon and stinker , you know your crap , it was the clutches in the differential ... thanks again