The early 727 was notorious for creeping forward in Neutral...the reason was the rear clutch drum where captive fluid would cause enough drag to act like the clutch was partially applied. The fix was to drill a series of holes around the periphery of the drum for trapped fluid to escape from. First introduced in '67. Thanks for that info. My rear drums are not drilled so that could be the cause. Anyway, I'm putting the body on the frame and won't worry anymore until I do a test drive. That will be a ways off.
'64 Sport Fury, 528 Hemi, FiTech EFI, 4-speed, 4.10 Dana 60
'57 Belvedere 2dr sedan, current project in process
'19 Cherokee Trail Hawk Elite
'03 Ram 2500 CTD HO, 6-speed 214,000 miles and still going strong
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