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08-05-2004, 01:33 PM | #1 |
Hot Rods For Life
Join Date: Sep 2001
Location: Waxahachie, TX
Posts: 3,305
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Help me out guys. What is "low hump" and "high hump"?
Low mean it's a 2wd and high mean 4wd?
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08-05-2004, 01:58 PM | #2 |
Registered User
Join Date: May 2000
Location: Flin Flon, Manitoba, Canada
Posts: 8,853
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Low humps were also in 2wd trucks that either had an auto tranny or a 3 speed. The high hump is only to make room for the 4 speed SM465 trannies and transfer cases on the 4x4 models. The high hump was basically used on every 4 speed truck
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My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795 |
08-05-2004, 02:17 PM | #3 |
Hot Rods For Life
Join Date: Sep 2001
Location: Waxahachie, TX
Posts: 3,305
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So I can't put a 4 speed tranny in a low hump cab if I wanted? I guess I would have to ad a high hump right?
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08-05-2004, 02:22 PM | #4 |
Registered User
Join Date: May 2000
Location: Flin Flon, Manitoba, Canada
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yep, cut a big ol hole in the floor and get a bolt on high hump for it. You can usually get them pretty cheap on the parts board. Or .....if I remember correctly, a Muncie 4 speed from an older Camaro would fit under a low hump. Might be worth checking into bud
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My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795 |
08-05-2004, 02:46 PM | #5 |
Hot Rods For Life
Join Date: Sep 2001
Location: Waxahachie, TX
Posts: 3,305
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Thanks Doob. I would loave to have a 4 speed with a high a$$ shifter with a crazy Rat Rod shift knob on there.
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08-05-2004, 02:48 PM | #6 |
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Join Date: May 2000
Location: Flin Flon, Manitoba, Canada
Posts: 8,853
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Yeah they're cool. We converted the 3 speed column shift to a floor shift and it is going to have a fabricated rat rod shifter made up for it. This is what it looks like so far
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My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795 |
08-05-2004, 03:34 PM | #7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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The high hump was also on big block trucks with automatics..and it seems some of the 1500 GMC with V-6 engines and automatics came like this too.
This is a shot of my 69 1500 SWB GMC originally equipped with a 305 V-6 and TH400. |
08-05-2004, 06:57 PM | #8 |
All Go, No Show
Join Date: Jul 2003
Location: Creighton SK
Posts: 286
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its a shame, I have a high hump in mine and only a auto tranny. there was a 4 speed in it
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08-05-2004, 09:20 PM | #9 |
Lovin' Arizona Since 1961
Join Date: Jul 2004
Location: Camp Verde, Arizona
Posts: 173
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Will the 700R4 tranny fit under a low humper? My truck has a high hump, but I'd swap it for a low one if the 700R4 will fit (future mod coming). H.
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08-05-2004, 09:48 PM | #10 |
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Location: Lincoln, Nebraska
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Most turbo 400 automatic transmissions used the bolt in high hump floor pan. The exception that I have noticed is when the 400 was used behind the V6 GMC motor in 67. The low hump floor was just the standard floor stamping. When the 4 speeds, 4x4's, and most turbo 400 automatics were ordered, the factory stamp cut out the standard low floor pan and installed welded nuts in the underside floor so a bolt in/out high hump . Some reasons I suspect was is heat disapation clearance, some for access to the shifters. In my early GM master parts catalog you could buy a new cab in prime($900 back in 72) and one of the notes is cut floor for high hump installation and also for factory air installation, and others for harness modifications if I remember right. I'm not close to my books tonight but I am sure on the floor hump and the fact their was only one service cab part number coming from GM.
If your not a purist, just cut out the floor area and use no drill sheet metal screws and caulk and you'll have a factory looking cover installed in no time. Mark
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08-06-2004, 12:44 AM | #11 |
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Location: Palm Springs, Ca.
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Hey Longhorn Man, what's the small hole in your hi-hump for ?
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08-06-2004, 08:37 AM | #12 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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I stopped trying to figure that one out sub4rvr. All I know is the hole has some original paint in it...so the hole has been there since day one.
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08-06-2004, 09:13 AM | #13 |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Hunter, yes you can easily put a 700 under a low hump floor. My orange truck is that way.
Also FYI to everybody, a big block and turbo 400 will also fit under a low hump floor, even though all of the factory big block/ auto trucks were high hump.
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08-06-2004, 12:06 PM | #14 |
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Location: Holts Summit, Mo.
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Will a bb with a 700r4 fit under the low hump?
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08-06-2004, 02:07 PM | #15 | |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
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Quote:
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08-06-2004, 12:27 PM | #16 |
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Join Date: Apr 2003
Location: NB
Posts: 3,367
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Yep the 4 speed Muncie will fit under a low hump!
Looks better too!w/ low hump IMO! |
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