I have a 1972 skylark convertible and have a little problem the rear end is not parallell against ground i have replaced the spring and shockabsorbers but it did not help The left side is hanging down app. 1,5 inch Is there anybody who can give me some advise Bengt J
Sounds like a weak coil on one side. Springs have been an issue for my '71 as well. A weak coil up front could also affect the rear. Try swapping the rear coils to opposite sides. Remove the lower end of the shocks at the bottom mount. Jack the car up & put a pair of good stands under the frame rails. The rear axle will stay on the ground. Once the car is up & SECURE, the coils come out very easily. Mark them so you don't put the same one back in the same side. If the problem follows the coil you know it's the coil. Which engine do you have & is it an AC car?
is the frame bent ? would the body bushings in that area be completely collapsed ? is the front end level ? a taller right front spring would may left rear sit lower. as a last resort, u could pace a metal spacer under the left rear spring. have u tried swapping the rear springs side to side ?
Springs I have a lot of things to check now thanks guy i will check all your proposals thanks again :TU:
Tagging on I seem to have the same problem. New springs got me closer to even, but. No bent frame and vise versa. Could be options on the car that add more weight to one side or the other. o No:
Joe, My '71 Skylark with 350 & AC was down an inch on the pass. side. Suspension pieces & frame all mint. New rubber everywhere including body mounts. Put in two different set of new springs last year. Ride height changed slightly but still had the 1" difference. Spring shop & I both contacted Eaton. Everybody still shaking their heads as we can find no reason for this other than AC on that side = 114 lbs. front & -2 lbs rear. Full size spare on this side also. Eaton fixed it by sending me a steel 9/16" spacer for the pass. side front coil. Raised the front corner slightly & dropped the opposite rear corner slightly. Car now sits within 3/8" of level which is OK by me. The GM Master Parts Book I have shows about a dozen different front coils for the car. Variables include LH & RH, engine, AC, standard & heavy duty,2 dr., 4 dr., convertible. Looks like the aftermarket has taken these coils & refined them to a smaller selection. Spring rates, heights etc. may have been rounded to common coils from what was a selection of 3-4 for the same application.
seems to me that i read some time ago, that if u had a/c , the passenger side front spring had a higher tension rate that the driver side spring, to retain the proper ride height.
LH & RH example for a '71 Skylark 2dr. hardtop, 350/350 with AC. GM Master Parts Book, A-Body Buick '64-'76. Series Regular Duty Heavy Duty Non AC AC Non AC AC 43337 RH LH RH LH RH LH RH LH Coil # 400880 400880 405929 405929 402084 409987 400995 402084 Confused yet?
I have the same problem with my 71.Funny,I just changed the rear springs today.Shocks where changed recently also.Driver's side rear 3/4 inch lower than passenger side.Exactly the same before and after spring change uzzled: .Drivers rear sits at 25 1/2" from bottom of wheel well moulding to ground,and passenger side sits at 26 1/4" o No:.I also measured from the bottom of the rear frame in back of the car(bumper is off) to the floor on both sides and get exactly 18" on each side.Fronts are fine,sits perfect.
steve: those #s probably represent the different suspensio options- standard, f40, f41 and a/c no a/c.
Gerry, Yes the numbers refer to various options available. I typed them on screen so they were neatly displayed in columns. Columns showed the car, regular duty, HD, LH, RH etc.. Hit "Post Reply" & they all went a little funny. Here is a scan. Hoping it will be clear enogh to see the numbers.
