Upper mount will make the click, put the car in gear, turned off and rock it with the hood open, you'll see the motor move and you will prob notice the upper mount hitting itself, the control arm bushings are next in the process, these are the first two things to check when u hear a clunkish pop upon accel and decel,after that i go with checking the rest of the front as others have suggested....ill double the yikes on the trans mount that was barely hanging on though wow bud u got lucky. From the sounds of it the cv is probably fine, deff that upper mount u should look into, they are tight even when they are bad though this puzzled me for a month with my first Z-1995, i did the control rear bushings and i still had a clunk the upper mount n it went away, so it may have been a combination...hard to say. And it doesn't do it immediately because its rubbers nature to be stiffer when its cold, after your motor warms the bay the mounts get softer which is what im gonna say causes that delay. If you wanna replace the axle go for it, but I think it will be money waisted, or peace of mind...however you wanna look at it. Advance auto approx 80ish, plus there is always cupons for ordering online so you can most always count on a deal, and if you have PayPal and bill me later and add advanced auto to your favorites list they send you promo codes for discounts as well, umm autopartswarehouse.com is a good one I use a lot for oem stuff, and of course eBay is also a good source, many parts suppliers sell their inventory on there for half off a parts store price sometimes, I got my Wagner master cylinder for my couch and saved 20bux, warranty and all. That's good u did the swaybar though lol, factory design is a poor quality steel, I think I used trw for mine, trw for the whole front chasis system, prothane control arm bushings, and timkin bearings, my mistake was assuming the control arm bolts to be good to use again...big mistake, as I have play, but I have to put a clutch in this weekend so ill be replacing those with automotive grade 8 or 10 bolts with locktite...o yeah blue locktite is ur friend haha. Good luck to you and ill get on tomorrow n this weekend to check for updates on ur situation, provide some help if i can