[JohnDarwin24]

I'm Currently Having A Popping Noise Every Time I Accelerate Forward I Here A Popping Noise But When I Get Up To Spend It Stops If I Slow Down And Press The Gas It Does It Again Sounds Like It's Coming From Down Below In The Front Axle My Sts V8 Is Awd I Let The Shop Put It On A Rack And The Passenger Side Wheel Isn't Spinning With All The Wheels Please Help I Love This Car

 

[Submariner409]

Re: 2005 Cadillac Sts

sOMETHING iS wRONG wITH yOUR cAPS lOCK aND pUNCTUATION pROBLEMS.

Thread title changed to better reflect your problem.

(Welcome to the Funny Farm !!! :highfive: . There's not much slack around here.)

 

[curtc]

I had a similar sound with my RWD V8, turned out to be a motor mount - Now, yours being an AWD model introduces a little added complexity.

 

[Madisonburgh]

I have the same concern. I have an 06 awd 4.6. I thought motor mount but it's a rotational noise. I've only seen a mount create a singular knock noise as well as movement felt in the engine bay. I've been thinking cv axles or the propeller shaft. My car won't produce the symptom on a lift.

 

[EChas3]

If one front wheel isn't turning, the brake caliper could be sticking, the CV joint could be going, or the differential could be shot (to name a few). What did the mechanic with the lift say?

Guessing wrong may be costly and a complete waste. I'd strongly consider taking it to a Cadillac dealer.

 

[JohnDarwin24]

The Shop Said Transfer Case

 

[Ludacrisvp]

Could be the _chain_ inside the transfer case being stretched. Rather simple fix and much cheaper outside of a dealership.
See the SRX (uses same drivetrain) post here:
http://www.cadillacforums.com/forums/cadillac-srx-first-generation-forum-2004/212418-diy-transfercase-chain-replacement.html
http://www.ebay.com/itm/281184204191