E Ebhardt New Member Apr 27, 2009 4 0 0 May 1, 2009 #1 May 1, 2009 #1 My friend has a 1991, 5.0L Mustang Automatic. The speedometer starts jumping at about 40 mph. It jumps from 0 - 100. He put in a new speedometer cable and the problem got WORSE!! Any ideas???? Please help!! Thanks, Jen
My friend has a 1991, 5.0L Mustang Automatic. The speedometer starts jumping at about 40 mph. It jumps from 0 - 100. He put in a new speedometer cable and the problem got WORSE!! Any ideas???? Please help!! Thanks, Jen