intermittent overdrive sl300 1991
 

Hello, i been having problems with overdrive, some times it shift to 5 th gear and some time not. everything else work fine. cleanning of microswitch at the console has be done and i clean a switch with two pins down the trans. But problem continue. pls help.

The HGS trans computer can be accessed for codes with a "impulse-type" scanner. Why not see if there is a code?