I've seen on other threads that older Corolla's are prone to bad speedos.  My '98 LE has been through 2 speed sensors (on the tranny) and 2 instrument clusters and it's still acting up.  Any ideas on how to trace down the potential bad grounds in the tranny circuit?  Should I take her to the dealer and have them run a diagnostic on it?
Thanks for any help ya'll can give.
								Thanks for any help ya'll can give.