Mine had a similar knock coming from my left hand side too only when hitting small bumps in the road and it turned out to be a worn bush in the front upper control arm, when you jack the car up can you hear a creaking/smallish knock sound ?? Im sure youd of heard it when you jacked the car up, but thats what mine was ....
When cornering your inside wheel doesnt rotate at the same speed as your outside, this is why diffs allow the outside wheel to spin faster while cornering. by welding the diff you eliminate this and therefore have both wheels spinning at the same speed so it will "skip" at slow speeds.
Its perfect for drifting but not what you want for a daily
your only option is to get a new diff. Ideally a LSD so you can have your lock when you want it but it will act normal on the streets
Pretty sure they would be out of the r33 4 door impul edition (R33R)
If they look like these
VVVVV
http://www.google.com.au/imgres?q=r33+impul+seats&um=1&hl=en&biw=1311&bih=646&tbm=isch&tbnid=hKqsF8ceuspUaM:&imgrefurl=http://www.skylinesaustralia.com/forums/topic/332956-skyline-optional-extras/&docid=Zd0JnQNrzyKhCM&imgurl=http://i24.photobucket.com/albums/c39/philta/DSC00710.jpg&w=777&h=583&ei=Dky-T9-AIo3umAWVm5QV&zoom=1
Then there from one of these
VVVVVV
http://www.skylinesaustralia.com/forums/topic/229099-1993-r33r-impul-sedan/
I made one for my 32 out of sheet metal, looked good, nice and secure .... got pulled over and told its still illegal enless I have an engineers cert for it (NSW) which would cost an arm and a leg ....
Update -------------------------
Have just put on a new passenger side fender to fix the dints and have hopefully got a door coming soon to fix up the small dint on the passenger side door.
Have also wrapped the bonnet in carbon fibre look vinyl, looks pretty smick
Bumppppp $6000
I had a similar problem with my fusion alarm (I know .... fusion ... haha)
Autobarn, alarm shop, alarm guy who installed it, none of them could get one so I emailed fusion and they sent me a new replacement
Maybe try emailing mongoose ??
It's a valve that goes before your end muffler (on flange) and it has a butterfly valve (like a throttle valve) and you can close and open this valve which inturn changes how loud your exhaust is
As above 99.9% of sure it wouldnt be the gearbox end, as above, a nasty shift would simpily cause a violent jerk which could have broken the weak as piss plastic end that goes into the back of your cluster. Taking the dash cluster out takes 5 mins if that
as above, your speedo cable could be broken or if you replaced the dial it could be that. Generally if the cables broken but still in place itll wobble a fair bit.
Id be taking out the cluster and checking the cable
It is most likely going to be a broken speedo cable (the white plastic prong thing that sits in the back of the cluster has broken).
You can pull the dash cluster out and check whether the central white probe (has a squarish tip) is loose or not. If it is loose and deattaches from the cable then its broken
Ideally you should buy a new speedo cable. When mine went i simply used electrical tape around the bottom of the prong and stuck it tightly in and ensured it didnt move but still rotated. Has lasted me 20,000kms with no issues.
Thinking about smoking my stock clear/orange indicators to match the non projector style r32 headlights if you get what i mean (refer to pic).
Dont really wana spend 150 on some smoked ones.
Was thinking of getting the vht nightshade stuff
did a search and couldnt find any pictures of it anywhere and was wondering if this diy had been done before and does anyone have pictures??