When I was pulling away from a stop today on some backroads I went WOT through first gear and shifted into second and got back on it, and about 500rpm later i got a little bit of wheelhop and then it turned into a HUGE vibration and banging sound from the rear end. After that, any time I was starting to hit boost or getting into power, the vibration/shaking and banging occured again, and the car felt like it just wheel hopping really bad and wasnt accelerating anymore. Anybody have any ideas what could have happened? I looked underneath the car and I couldnt see anything visibily wrong, so I'm guessing there could be wrong with the diff? Any help would be much appreciated.....



I have a S5 T-II if that makes a difference.

check the front diff. mount where the driveshaft connects to the diff.

If the front differential mount is bad, you will hear & feel a thunk when you start to roll in 1st, as the front of the differential hits the bottom of the tunnel.



http://208.62.166.66:82/guest/Shop_M...ff%20mount.JPG

[quote name='sureshot' date='Jun 1 2005, 10:01 AM']If the front differential mount is bad, you will hear & feel a thunk when you start to roll in 1st, as the front of the differential hits the bottom of the tunnel.



http://208.62.166.66:82/guest/Shop_M...ff%20mount.JPG


[/quote]



awsome, you answered my question for my car too https://www.nopistons.com/forums/pub...IR#>/bigok.gif

the thing is, I dont really hear a thunk when I take off from first. It only occurs once i get into the powerband and it isnt just a single thunk. I played around with it today and it appears that it isnt as bad in 3rd gear, and it hasnt happened so far in 4th or 5th gear...

How about that, I think mine just went bad. Meh ****.

hey, first post here. i was just about to post about a similar problem. i have a 86 gxl. it has a stage 2 exedy clutch and stock lsd. my problem starts the second i engage into gear. i hear a clunk almost everytime i engage into first. then, almost everytime i shift into 2nd, same thing. shift into 3rd, same. i wouldnt mind this that much, its just that when i shift to 4th, my car vibrates a little bit. when i shift into 5th, my car feels as if it would fall into pieces. it also vibrates when i roll in neutral around 35 mph. i have been told that the problem was my driveshaft.. any gurus out there who can help a newb out https://www.nopistons.com/forums/pub...1047683358.gif TIA

[quote name='1_slo_13b' date='Jun 2 2005, 12:26 AM']hey, first post here. i was just about to post about a similar problem. i have a 86 gxl. it has a stage 2 exedy clutch and stock lsd. my problem starts the second i engage into gear. i hear a clunk almost everytime i engage into first. then, almost everytime i shift into 2nd, same thing. shift into 3rd, same. i wouldnt mind this that much, its just that when i shift to 4th, my car vibrates a little bit. when i shift into 5th, my car feels as if it would fall into pieces. it also vibrates when i roll in neutral around 35 mph. i have been told that the problem was my driveshaft.. any gurus out there who can help a newb out https://www.nopistons.com/forums/pub...1047683358.gif TIA


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its the front diff mount, had mine like that 2 years ago. me and a friend took the whole rear down and threw the shitty one away and he fabricated a solid one and welded it back. its all good rightnow but there is a little vibration at high rpms. the good thing is that my friend did it for free. saved me $125 + labor. https://www.nopistons.com/forums/pub...IR#>/smile.png

[quote name='TooMuch4You' date='May 31 2005, 07:59 PM']...a HUGE vibration and banging sound from the rear end. After that, any time I was starting to hit boost or getting into power, the vibration/shaking and banging occured ....and wasnt accelerating anymore... I have a S5 T-II
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When you have it on jackstands to check the diff mount, turn each rear wheel back & forth.

Listen & feel for excess backlash in the the 4 rear axle CV joints.

You could even have a broken axle.