kmn5

Hello All,
my friend just picked up a 93 ES300
the tranny was known to be dead. and needed to be replaced.
But he changed out the fluid and it works fine now.
So he wound up not need a replacement after all.
Which is great. Car is fine on loacl streets, but on the highway the OD light would flash.
any one have anny suggestion or ideas what this might be? Is it an electrical problem.
I told him to use the Homer Simpson fix and put a piece of tape over the flahing light =P
But he'd like to find a real fix for it.

Thanks all
Regards
Ken
SC300 - 5spd, NYC