how to measure frame twist.?. -
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post #1 of 3 Old 02-28-2010, 06:47 AM Thread Starter
CALOcruiser's Avatar
1978 CJ7 
Join Date: Feb 2010
Location: Greensboro, NC
Posts: 478
how to measure frame twist.?.

what reference point do you use to see if your frame rail ends are offset? obviously the ground won't work since the susp is a variable. there is no obvious evidence of frame bending with visual inspection of welds and rails, but the driver's side leans about 1" lower than passenger. guys on my other post said the lean is likely cheap springs, but want to be sure.

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post #2 of 3 Old 02-28-2010, 06:55 AM
Mike Romain
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1986 CJ7 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant
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Look up CJ lean. It is a factory defect that can be fixed by putting a lowering block under the passenger side rear axle according to a Jeep TSB. My 86 frame barely had any, my 'new' 79 frame has a nasty lean.

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post #3 of 3 Old 02-28-2010, 07:32 AM Thread Starter
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1978 CJ7 
Join Date: Feb 2010
Location: Greensboro, NC
Posts: 478
thanks. the PO told me it was "bad engineering" that all CJs had, but I was skeptical. I'm new to CJ, previous YJ owner myself. It looked like the springs may be the issue, so I went through with the purchase. the only frame issue, that I dismissed in the heat of the purchase is 1 dimple in front of the rear driver's side spring mount. It is exactly where the brake lines are divided in two with a splitter. I rationalize that the dimple was designed there to give the brake cable splitter clearance. I had no way of knowing for sure. Any one else have this dimple? the top and bottom profile of the frame rail is fine, just dimple on the inside.
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