overdrive help 1991 740
 

My 1991 740 overdrive lockout seems to kick on at will. Button on shifter will not turn it off. Have replaced relay no luck.
Checked wires at bottom of shifter appear ok. Do not know how to take off the top of ****er to check button. Can I disconnect?
Never us anyway!!!! Thank you for any imput or help. SORRY---auto trans.

RE: overdrive help 1991 740
 

It could be the button, I've seen them gum up and do that. I believe the '91 has the old style pressure fitted button which pulls out by prying it out carefully with a little flat head screwdriver. Once out just clean it and see how it goes.

RE: overdrive help 1991 740
 

thank you will go give it a try -- let you know how it turns out!

RE: overdrive help 1991 740
 

removed switch, looked fine cleaned anyway. still have no overdrive....arrow light on dash is on when i start the car.
is there a way to bypass or disconnect?

RE: overdrive help 1991 740
 

Same thing happened to me last Friday. Turned out to be fuse #11. Yours may be different.

RE: overdrive help 1991 740
 

yes you can bypasss it
buy this kit which is just a piece of metal
or buy a new o ring and use a dremal and cut the two ports so they are one like in the ipd picture
thats what i did works great :D

RE: overdrive help 1991 740
 

thanks, will give that a try. any tips on getting to the bolts on sylin..... not much room!!