Hello all,
I just got my Z28 2 saturdays ago and when I bought it the transmission was jerking in first gear hard and second gear a very little bit.

Now, last friday or saturday I let one of my buddies drive it for a bit and since my transmission is not shifting as it should, if you rip on it and don't let off the gas to let it shift it'll just keep pushing through rpms and then shift way beyond the danger zone, and that is just what he did. After that it started making a weird noise from the rear, kind of like something rubbing.

I replaced the rear u-joint but that did not make any noticeable difference. I made sure all the wheels were torqued down correctly. The noise only shows up if the wheels are moving, and if I am under 10mph then the noise is very quiet and sometimes you cant even hear it.

The noise seems to be getting worse because I am hearing a popping noise every so often when driving it.
If any one can help me out that would be great because I really got myself in a jam here, and I don't want to take it to a shop just yet.
Thanks so much in advance to any one that can help me out.