Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
That sounds like an outer CV joint problem.
There has been a service bulletin for that type of concern in colder temperatures that requires that the grease be changed in the outer joints. If it does it when warmed up, (or in the warmer months) then you will want to replace the outer joint.
Here is what it states.
|Drivetrain - Front End Knocking Noise on Acceleration |
Bulletin No.: 08-04-19-001
Date: March 17, 2008
Knocking Type Noise Coming From Front of Vehicle When Accelerating and Turning (Regrease Both Left and Right Front Wheel Drive Shaft Outer Joints)
2008 Saturn VUE
with V6 Engine (VINs 7, N - RPOs LY7, LZ4)
Some customers may comment on a knocking type noise coming from the front of the vehicle when accelerating and turning. This noise will typically only occur after a cold soak in temperatures below freezing and will go away after a few moments of driving or after the vehicle warms up. This condition is only present when both accelerating and turning.
Regrease both the left and right front wheel drive shaft outer joints following the procedure listed below. Use the synthetic grease provided in the new boot kit P/N 19178957.