Use GM Syncromesh #12345349 This is an excellent
synthetic (Even though it is made by General Motors). When I bought my TKO there was paperwork in it recommending ONLY this fluid! It is available at most parts houses. I did not hook up any of the switches. I installed mine in a 1963 Galaxie. My trans was a little stiff shifting and a little noisy, but time and miles are helping both. Later, David.