Quote:
Originally Posted by Clarke
Ed, I remember your dad showing me that but it's been too many years. Can you provide us with more details? I'm doing more and more towing with my GMC and I may consider doing something similar.
Is it an overdrive only or does it actually have in-between gears? I have the handbrake adapter on the back of my transmission. I'm assuming the driveshaft would have to be shortened?
TJ, please keep me posted on what you find out.
Thanks,
David
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David --
It's a totally separate two speed transmission connected to the rear of the main 4 speed transmission by a short driveshaft. It obviously requires shortening the main driveshaft. It's mounted with a couple of angle iron cross-members. It's operated with a long cable connected to the big knob on the dash just to the right of the ignition switch.
Although theoretically you could operate the two boxes together, giving you 8 forward speeds, in reality (for me anyway) it doesn't work easily enough to do gear-splitting. The way I use it is to leave it in direct 1:1 drive while shifting up through the gears, then pull out the knob while in 4th to go into the 1:0.82 overdrive. This turns the 4.57 rear end into a 3.75 effective ratio. Downshifting the Brownie requires a well-timed double-clutch, so I usually don't downshift it until I'm at a complete stop.
When I drove it out here from Wichita, I just left it in overdrive for most of the trip. Driving it around town now, though, I just leave it in direct drive. It does have a bit of a whine when in overdrive.
Ed