JF-WS6

iTrader: (1)

First off, i was getting some bad vibration during hard acceleration in third and forth gear, but not all of the time. Sometimes it would sometimes it wouldn't. I never could figure it out. Saturday i installed Koni 4/4, Strano springs and sway bars, UMI Adjustable Panhard bar and a UMI non-adjustable TA with the relocating bracket. Now i am getting bad vibration all the time at 50mph and up, only when im on the gas. If i let off the gas it goes away. Its bad enough that i can't drive it over 50. Any thoughts? Thanks

JF-WS6

iTrader: (1)

Anyone?

95GreenZ28

iTrader: (70)

How does the tranny bushing look?

Pipelayaz

iTrader: (2)

Get an alignment yet? Rotate and balance your tires.

leadfoot4

iTrader: (1)

Have you checked your pinion angle?

BMR Suspension

iTrader: (6)

Is the car lowered or stock height? sounds like the U-joints could be shot. I would check for play in both the front and back U-joints.

JF-WS6

iTrader: (1)

I got the alignment done. I wouldn't think it would be the tires if it only does it when im on the gas.

JF-WS6

iTrader: (1)

I have not. I dont have an adjustable TA.
I will have to check my U-joints. They are only about a year old.

leadfoot4

iTrader: (1)

You may want to check it anyway. As somebody already mentioned, u-joints may be a possibility, however you also mentioned that it worsened after you put the lowering springs and TA on. You might have gotten into a situation where the pinion angle is out of the acceptable range now.

Relapse

iTrader: (4)

2 days ago my car was shaking terribly going 90 + when i'd get on the gas, like you're describing. Today i took my car in to discount tires bc there was a screw in my back right tire and i needed a patch, i just told them to balance the tires. I'm going 100 on the way home, no shake. Could be as simple as that.. i dont know though

JF-WS6

iTrader: (1)

Well i talked with Sam Strano and he had me try a few things to narrow it down. He feels it is probably my pinion angle. I ordered an Adjustable TA, Hopefully that will cure my problem. My Hats off to Sam Strano for AWESOME customer service.