Important! : Strange knock

1. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #1 30th November 2013, 11:59

   I have recently replaced the clutch, gearbox, driveshafts and wishbones on my vtr. It has been a couple of weeks now and the car has developed a knocking noise when the car decelerates without applying the brakes.
   
   The noise is a knocking that decreases in frequency as the car slows down. It is quite loud and seems to be coming from somewhere on the passenger side.
   
   I have been under the car and checked everything is tight that has been touched while doing the previous work and i cant work out what is causing the noise.
   
   Any ideas or advice?
   Thanks in advance
2. Mickswan Saxperience Forum Bum Joined: Apr 2013 Jarrow Posts: 4022 2003 Icelandic Grey 16v VTR 1991 Daihatsu GTti

   #2 30th November 2013, 12:19

   Driveshaft maybe, what was the gearbox like you put in?
3. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #3 30th November 2013, 12:27

   It's got brand new driveshafs put in when doing the gearbox and clutch. The gearbox drives fine, no grinding or whining or problems getting into gear etc
4. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #4 30th November 2013, 16:50

   Also it happens whether in gear or not so i don't think its the gear box. But it definitely sounds like it has something to do with the rotation of the wheels, the noise is periodic and decreases in frequency as the car slows down. There is no noise when accelerating or braking.
5. Mickswan Saxperience Forum Bum Joined: Apr 2013 Jarrow Posts: 4022 2003 Icelandic Grey 16v VTR 1991 Daihatsu GTti

   #5 30th November 2013, 18:56

   Did you put a new release bearing in?
6. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #6 30th November 2013, 19:11

   Yep new release bearing came with clutch
7. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #7 30th November 2013, 19:38

   Check the 19mm nut for the top gearbox mount, or the 3 13mm nuts that hold the mount on they like work loose making a knock & will end up snapping
8. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #8 30th November 2013, 20:56

   Thanks will give it a try. Sounds like a rotational sort of knock though
9. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

   #9 3rd December 2013, 14:05

   Checked the gearbox mount and it appears to be fine. Its so annoying!
10. djx11b Frequent Poster Joined: Mar 2008 Glasgow Posts: 565 Saxo Vts Mk1 1997

    #10 3rd December 2013, 14:36

    edit just seen the gearbox was replaced.....
    
    that was my knocking noise after driveshafts and clutch were done
11. user_29725 Regular Poster Joined: Dec 2008 shoreham Posts: 301 Dead: mk1 vtr, mk2 vtr, mk1 vts Sold: 350z, mx5

    #11 5th December 2013, 10:31

    Could it be that something wasn't seated/fitted properly when changing it all over?