I have a prob with one of my blazers a thumping noise in the rear It only thumps under load never when it is on stands I have replaced the following chain, front and rear sprockets and bearings on chain side..also I removed aftermarket skid plate cause i thought this was the prob but no luck yet noise still there ANY HELP OUT THERE?????

 

You might check your swing arm bushings and the bolts that hold them also. Mine came loose made lots of noise!

Jeff
03 tb250

 

thanks I will have a look at that I had not thought of that just hope its not a tranny problem