Overdrive Options

1970Duster said

I'm just pointing this out and yes I would do this before you ask. Okay if you are willing to cut the tranny tunnel (no a ding with a hammer or cut a small section of brace for the 200R4) I talking the major surgery to install the 4l60/4l80, why limit yourself to the 4 speed auto? I'd opt to install a 6 speed auto and deal with the extra work needed. Really it's not the much more work to gain a double overdrive. I'm just saying that's all.

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I think the six speed is based on a 4l80e. Mentioned to my buddy who is going to build mine some time and he just shrugged his shoulders and said what ever turns you on. It very well might be very similar to what he did with the Ford a4ld in the off road trucks, using od to split the gears. Except in the a4ld he was also able to use lock up in any forward gear. If this is the case it sort of is not really a double od, as the od is being used as a splitter........