Other Category problem
1992 Buick Roadmaster V8 Two Wheel Drive Automatic 123000 miles
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My roadmaster speedometer has begun working intermittently. At speeds below 40 mph, sometimes it registers no speed. At highway speeds it works, but seems to be recording speeds lower (~5 mph below) actual speed, and it jumps over a 20 mph range. I cannot keep the cruise conrol engaged. This is an analog speedometer. I have not changed the transmission. Any ideas waht the problem is?

yes it can only be the seed sensor on the trans or the cluster.look for them in a junk yard if u wanna save cash.my dad has a 95 and the speedo didnt work so he just got the whole cluster and walla.

spell check...speed sensor in trans