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Jan 21st, 2020
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 inline split driveshaft overdrive
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Joined: Mar 2020
Posts: 7
OP
New Guy
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hi guys was wondering if any of you guys have ever seen or heard of this . My truck has a split drive shaft with a what im calling a overdrive box .
On the dash between the choke and throttle there is a black knob . Going down the road ill push in the clutch and pull the knob out and it drops almost like in to another gear . 1953 3600 235 long bed . like to hear your thoughts . thanks
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Re: inline split driveshaft overdrive
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Joined: Sep 2001
Posts: 30,782
ace skiver
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Truckstell "Tip-toe-matic" overdrive [ google.com] I have a complete assembly in a storage shed (waiting to go to a Stovebolt.com member). We have not found a convenient occasion to make the "hand-off"
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Re: inline split driveshaft overdrive
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Joined: Feb 2004
Posts: 21,577
Boltergeist
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Truckstell made a similar setup for Ford- - - -as far back as the 1920's. I had a friend with a Model TT fire truck with a Truckstell system, but I believe it was an "underdrive" that allowed the driver to select a very low ratio starting gear to get the rig moving. Since the T model only had two speeds, the ability to gear down in both first and direct drive allowed coach builders to exceed the designed gross weight for commercial vehicles.
Jerry
The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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Re: inline split driveshaft overdrive
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Joined: Jun 2005
Posts: 228
Shop Shark
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'66 c10 rust bucket, 350 nv4500 stock bellhousing, '85 c30 front suspension, h072 rear axle with 3/4 ton rear coil springs
'67 cj5 225 oddfire motor, time for disc brake conversion, offset rear dana 44, intermediate pedals and steering upgrade
'48 3804 frame and bed + '52 6400 cab and front clip + 4bt, need to put them together
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Re: inline split driveshaft overdrive
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Joined: Apr 2005
Posts: 2,653
Shop Shark
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Need a picture as Fred Hone also made an in driveshaft overdrive unit. Believe it was called a Hone-o-Drive. Friend had one in his later (70's ?) Ford pickup that bolted to the pinion snout. The Hone unit was round.
Evan
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