97targa

Anyone here ever experience or heard of problems with driveshaft vibrations due to Aftermarket Lowere control arms? I put in Lakewood Traction bars which alter the pinion angle with a 3/4" drop and have a slight growl coming from the rear when I let off the throttle. It's kinda loud if I'm going fast since there's more presure on the *** end when you go faster and over bumps. If I have a passenger in the car is very aparent. Almost seems the driveshaft is the noise since the rear diff rolls away from the tranny when the gas is pressed and rolls torwards when gas is off. I just don't know if the driveshaft is pushing into my tranny to far causing this problme. IT'S NOT my gears and IT'S NOT bad U-joints! Thanks

elite130

I had the exact same problem when I installed my MM LCA's. Before the install, I had no vibrations or noises at all, then allof a sudden after the install, I have, what seems to be, an off-balance driveshaft (which is a FRPP Alum. Driveshaft). I'm getting the DS balanced hoping that's what it is. I don't know how changing the LCA's could do that.

rmtaylor78

well damn, mine shakes and it's still stock...stock suspension, stock driveshaft

code3GT

Check your pinion angle and set it at about -2 degrees.

nathansee3

With any drop1.5 or over you are going to need to change pinon angle.

97targa

I only have a 3/4" drop, but with the Lakewoods I think they add another 1" to 1-1/4" on top of that. They don't lower my stance but they lower the geometry of the suspension! My sway bar practically sits on the ground. I took my diff cover off and pulled it straight off without hitting the swaybar which sits below the bottom of the pumkin!

GodAmGT00

You should check your Thrust Angle to see if maybe something isn't completely lined up either... Also, if you are still on a stock rear diff w/ some decent mileage, any change to pinion angle would result in noise, since you're now applying a different force to a different part of the semi-worn gears...

Just a thought though...



JT

97targa

Also, what will this hurt if I leave it this way besides the u-joints and my ego?...lol

GodAmGT00

Rear gears possibly, and if you drive it around a lot w/ drivetrain vibration, it starts eating away at things like your trans. bearings/races, gears, and eventually, maybe even the engine's bearings (main/crank/etc..) so it's better to have it checked sooner..



JT

97targa

It's not my gears! They are not worn, but brand new! The noise was not there before! I'm most positiv it's due to the Lakewoods and the Poly bushings transmitting the noise through the floorboard! I do appreciate your thoughts, but just seemed weird that nobody has every complained about this that I have seen! I realize most use Practically factory wannabe but stiffer LCA's, but I would think they would have an effect as well?