Nasty vibration from rear of car

[88_GT_5_oh]

i'm having this problem that just started, about 2 weeks ago i had 3.73's put in and the left axel and bearing was also done, anyway when i hit about 100 km/h (60 mph) theres a nasty vibration from the rear end that i can feel in the stick, i thought maybe one of the weights on the drive shaft fell off so i raised the car put it in neutral and started spinning the tire to turn the shaft to see about the weights when i noticed that the driver side wheel, i can pull it about 1/16 - 1/8 towards me and back in, the passenger side is rock solid (no play), i didn't think this is normal but thought i'd post and see. I think here lies my vibration problem?!!?!?!?. i'm taking the car back to the shop tommorow and make him fix it.

 

[FrdMustangCpe]

yea, just take it back to the shop that installed the gears. they messed something up. not sure what but since gears were just put in, its gotta have something to do with it.

 

[DMAN302]

Back and forth play is actually axle play and it is normal in the range you are speaking about...however up and down is not. As for vibration I had exact same issue after my install and I happy to say that the FMS aluminun driveshaft changed the ride completely from mack truck crap ride to smooth quiet ride with a vibrationless shifter. Aside from the road noise, tire noise, spine jaring suspension,creeks and rattles of a 16yr old car, and the drone of my LT's Hpipe and flows my car rides as nice as a caddy.....lol. Can't hurt for the installer to check out the issue, but most likely you'll be calling Summit or jegs for your aluminum DS..good news is you can install it in under an hour.

 

[88hatchblack]

i would have someone check to make sure that the rearend was properly shimmed, and also have a look at the c-clips

 

[88_GT_5_oh]

Well i took it to the shop and the guy was like, "nah it has nothing to do with the axel" so he raises the car and pulls on the wheel, and it moves a bit back and forth, a funny look comes to his face, and within 5 mins that diff cover was off, and he was poking around in there. so i came back 2 1/2 hours later and he's just putting the finishing touches on, ha says he added some shims and some other stuff, so basically i got a complete rear tear down and rebuild for free , needless to say the vibration is gone now, except for a little bit from the drive shaft, which was always there, i think i'm gonna order a drive shaft from summit or jegs as long as not gonna get slaughtered with duty charges for bringing it over the border.