seto_s14

So currently I'm running a welded diff. Everytime I shift, there's a loud clunk coming from the rear once I give it gas. If I shift and don't give it gas, just kinda let it coast, it won't clunk. Also, I get this loud clunking around tight/slow corners in addition to the normal chirping of the tires.

I'm concerned because my car was originally automatic and ABS. When I got the 5 speed done, I have no idea whether they used the ABS driveshaft or not. Would this affect anything?

__________________
my ninja