whats the diff?
 

OK rear subframe mounts in alittle pull a lot of push. I found the numbers on the diff. Of the 83 280 sl. 3.58 is there a site to find out if its limited slip .it time to get out from under itand get under the hood.thanks again for the help .

Jack it up so both back wheels are off the ground. Turn one wheel, if the other wheel turns the same direction you have an LSD. If they turn opposite directions you don't.

The chances of you having an LSD are very slim.