Join Date: Mar 2002
Location: Austin, TX, USA
Re: Th 400 speedo problem
If it's pegging after 50 mph, but OK up to 50 mph, the problem is not the gears. There is a magnetically coupled disk arrangement connected to the pointer inside the speedo. Sounds like it's bent such that it begins to rub together above 50 mph.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI