mccorry

http://apod.nasa.gov/apod/image/9706/ngc1850_hst_big.jpg

http://thomaslegion.net/sitebuildercontent/sitebuilderpictures/slave_kidnap_poster_1851_boston.jpg

http://www.neilsberman.com/images/c_1852_back_large.jpg

BACK ON TRACK!

http://www.mfpilot.com/ebaypics/verlindentalibantheend1827.jpg

OOOOPPPPSSSS......

Here's my fix....

http://www.lib.k-state.edu/depts/spec/rarebooks/cookery/images/brillat1826tp.jpg

Exactly. Never had mine on a dyno... but it should show up there, I'd think.

Mine never does it unless it's below ~ 35 F or so....

I've had the shaft out... but it was at least a year ago.... Didn't notice any issues with the pivot (U-Joint) at that time. I've got to do a clutch soon, so I might be pulling it out again.

This problem has been around for several years (I've had it since '06 or so) with no issues.

You're in San Diego? How in the hell could you possibly be having the same issue as us (COLD weather NVH under accel)?

Yep... the noise started when I put my lowering springs in... during cold weather and heavy acceleration.

I added 1/4" shims to the rear to counteract rear sag (springs settling) and try and remedy the growling issue. It helped a bit... but I still have it.

I'll add.... I've rotated my tires, changed wheels and tires, inspected my joints and bushings, looked for interference between the driveline and the body, checked my rear end seals and bearings.... all fine and I still have the issue.

The only thing that helped it was putting some 1/4" shims in to raise the rear end up a bit.

A good way to stop it? Yeah we do, inspect your rear u-joint! If its bad replace the shaft. If its not that, it's something else! Your car should not make that noise, lowered, modded or stock for that matter! I wish the drive shaft had serviceable u-joints! Any noise your car is making with the stock bushings (unless they are blown) will only get louder with stiffer urethane bushings! I assume the only reason people have had varied success with bushing mods, is because the u-joint at the beginning stages of failure will be inconsistent. Inspect your u-joint! If its good take your drive shaft down to a drive line shop to see if its balanced. Next inspect your differential, rear axle shafts and wheel bearings. Rotate your tires too, to see if the noise moves. Every time I replaced soft bushing with harder one, I increased the NVH heard through the cabin!

Um... with Independent Rear suspension, like our LGT's have, the rear housing will not move with squat (suspension compression or rebound). It is fixed to the unibody via the rear subframe. There is no "pinion angle" change with our cars, like solid rear axle cars, so the rear U-joint isn't really involved from the "suspension" point of view.

More likely, it is there to compensate for torsional flex of the chassis and movement in the driveline from the engine / transmission mounts.

I was on the fence, too, SBT. 110K on the stock clutch... now slipping consistently in 5th over 10 psi boost. Actually running the car detuned now for several weeks to get to warmer weather.

I had a stock setup waiting... but decided to go with a WRX SM fly and ACT HD setup. Should be putting that into the car in the next few weeks.

I'm Stg 2.5 .... 18 psi boost.