i read the post on speedster owners, and here about the classic cmc rear sag. I have the same problem, funny the passenger side is very close, and it's the drivers side that is the problem. A bit of history, the car only had 1700mi since built, and it's built very well, everything else on the car is a 11 out of 10, so after reading the post about the cmc rear sag i went out and took off both wheels, put it on stands, jacks on the rear with a towel, and removed both side rivets (which were actually really tight and not moving at all) as i played for about an hour expirementing with the jacks on the back, if i jacked the pass up at all from where it was originally i'd have the pass door actually get stuck, and i can see on the frame where the fiberglass vertical pannels were originally positioned (from the undercoating sprayed on the car). I can almost say 100% that the rear was not sagging, and judging by the build quality of the rest of the car, i'm almost certain the car did not have this poor door allignment on the drivers door when the car was "new". Both doors are alligned perfectly along the botton and front, and i mean perfect. The ONLY issue i have is with the drivers door, it's actually lower than the rear section, and the gap at the bottom is perfect, and gets wider as you look up the door, which tells me it's almost like the body (but only rear upright) has to be pivoted with out effecting the rear. So after about an hour of studying the situation with the rivets all out on both sides, i decided to button everything up with the same position it was before i touched it. So i got a 1" by about 1/4" peice of allum, that i "sandwhiched" between the fiberglass upright and the frame rail. Drilled thru the allum, glass, and rail, washers, carriage bolts thru the entire thing, and i put 8 on each side, from the original 5 rivets. My result is that i'm right back where i started, but i can say the car is extreemly rigid, and i've definetly made the rear section much stronger, but my door gaps are the same!!! so half a days work and basically i got the same problem, but at least i have a solid stiff car now!!!! My tail pipes are perfect, so i can tell the rear is'nt sagging, plus i measured from the floor (absoultly level) to the corners, frame rail, everything and everything i've measured was within aircraft tollerances!!! But the damm drivers door still are out at the top only. I alligned the doors to the front and the bottom perfectly, just worrying about the rear allignment on a otherwise perfect car. And i can say i'm really getting pissed off (pardon my french) with it. Not is it just a little out, but alot, and it's a real eyesore, any ideas????????
martin
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