hello, i have an auto 90 celica gt and what i did was i had to buy a MOMO shifter because it was the only one that fit my car (
http://www.momousa.com/detail.php?category=6&group=48) thats the link. An since i had an over drive on the shifter, wat i did was i cut the wires and i bought an ignited switch (around $30) with a red led at the top it, i drilled a hole in my dash and mounted the switch, connected the wires to the switch and when i want to use overdrive i just flip the switch (
http://www.ignitedperformance.com/u_...intCatalogID=6) heres the link to the type of switch. there are many different colours to match your colour scheme in your car. hope i helped. have a good one!