Hey guys I've had my 71' 240z for a couple months now but just got it running a few days ago, motors strong but rear end feels like its sliding back and forth while driving?! Any suggestions?

Thanks in advance!

Take a look for loose parts, including lug nuts. And "rear end feels like its sliding back and forth while driving" isn't very informative. Could be wandering while in a straight line, could be while cornering, could be while accelerating, braking, etc. Bald tires, bad wheel bearings, over-inflated tires, worn-out bushings (suspension or steering), many possibilities. You have to get under there and see what the state of the situation is.

Brockus95, Welcome!

Get the car up on jack stands and get underneath with a pry bar and start checking for movement between components, it could just be the 33 year old rubber bushings need replacing.

Chris

Thanks zed head and grannyknot, sorry about the vagueness. It will feel like its swaying whenever you hit any sort of bump or take a turn quick, I'm getting it up on a lift tomorrow and taking a better look at it, checking for anything loose first then some new bushings. Thanks again!

It's good to look around under a Z anyway because the suspension system and unibody are unusual for anyone used to American cars. And read up on bushings before you go crazy buying, there are varying opinions on what to use for what purpose. Polyurethane is not a fix-all solution.

Check your half-shaft u-joints while you're underneath, if you have a grease gun have it handy. Your u-joints might have Zerk fittings or might have screw plugs. If you really want to be ready have a Zerk fitting and flat-blade screwdriver with you also.

Hey guys thanks for suggestions, rear struts ended up being SHOT replace those and she drives great now!