Sorry, can't help with your question. I have 04 TJ X with auto and overdrive with 31x10.50s. I never have to turn off overdrive on hills.
I don't want to hijack your thread, but maybe you can help me. Did you regear for the 35s? I am going to lift mine 4" and was going to go with 33s, but have thought about 1" BL with it and 35s. I know D35 is weak but it won't be wheeled more than 3-4 times a year at most.