highboy manual to automatic
Post Fiend
Joined: Jul 2003
Posts: 11,945
Likes: 3
From: Spokane, WA
Remove 4 speed, install automatic. Viola!
Seriously though, there's nothing to it. Going the other way around is a little tougher. You'll need to find an auto (C6 I assume) with a bellhousing that fits your engine. Then a flex plate and torque converter. Because you're using it in a high-boy you can use a 2wd tranny. You'll probably need to fab a mounting point for your t-case shift lever (this can be done off the cross member). You'll need a shifter for it, easiest way is to get a floor shifter like Lokar or a B&M Megashifter.
Seriously though, there's nothing to it. Going the other way around is a little tougher. You'll need to find an auto (C6 I assume) with a bellhousing that fits your engine. Then a flex plate and torque converter. Because you're using it in a high-boy you can use a 2wd tranny. You'll probably need to fab a mounting point for your t-case shift lever (this can be done off the cross member). You'll need a shifter for it, easiest way is to get a floor shifter like Lokar or a B&M Megashifter.
Posting Guru
Joined: Oct 2005
Posts: 1,235
Likes: 2
you'll also have to shorten the center driveshaft by a few inches... you'll also have to slide the tranny cross member back a bit- just slot the holes and you'll be okay. when i swapped mine from auto to 4 speed i also had to be sure and use the C6 tranny mount pad on the 4 speed cuz things just wouldn't line up perfect if i didn't.. i checked around and they do have a diferent part number for each of them so someting is a bit different- even though they mount to the tranny identically. good luck!!!
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