The Stovebolt Site Forums The Shop Area General Truck Talk High hump

After ordering a replacement floormat, I discovered that my 1960 1/2 ton Apache (TOT) three speed has a "high hump" cab floor. I had always assumed the high hump was necessary to accomodate a four speed transmission. Does anybody know the reasoning behind the two floor profiles in the 3-speed. I'm pretty sure my truck has never been converted from 4 spd to TOT. Were all the high humps produced in one factory and the low humps elswhere?
This is the second time I have been surprised when ordering parts and no choices were offered. A couple of months ago I came face to face with the fact that some trucks came with a metal frame around the roll up side windows. Some did not.
Are there any more surprises out there for me? Jimmy Carter catalog only listed one floormat for a three speed, and another for a four speed.They did not mention any distinction between hump height. Classic Parts of America listed a choice of high hump or low hump but did not mention anything about transmission. However;Classic Parts,in their online catalog did indicate that the the high hump was for the four speed. Neither supplier indicated that a three speed might also come with a high hump floor.

"pretty sure"? is there a patched hole where the 4spd shifter would have come thru? there are no variations in the floor pan other than humped or not

the 3spd and automatic had a slightly raised trans cover that some might call "low hump", the 4spd, because of the lid and shifter on it, needs a hump that's quite pronounced .... the factory didn't pick and choose, if the truck got a 3spd it got the correct floor pan

the metal glass frame was dropped in 64, all the 60-63 should have them, the glass shape changed then too if I remember right

do you have the shop manual and assembly manual? best way to keep it all straight

Bill

All I can say for sure is that my truck has a quite pronounced hump. The floor mat pad bought from Jimmy Carter measures 70 inches in width which is about right for the pad. The floormat,also bought from Jimmy Carter for a 1960 3-spd fits well on the drivers side but is seriously lacking in width on the passenger side. Needs another 4 inches at least and bunches wrong near the firewall at center. The matting on each side (smooth in the center) distributes such that it is obvious it was made for a lower hump.The bolt in pan is original and has no hole in it. It does not appear to have ever been removed. There is no evidence the truck ever had a 4-speed in it.
In a previous thread about door glass frames, there was a posting , probably in February this year, saying 1/2 ton trucks were produced in 1960 that did not have framed glass. In the Classic Parts of America catalog,page 6, there are listings for window channel for glass with and without metal frames.
meansam

My '62 didn't come with door glass chrome...just plain glass, and yes, it's original to the truck.

VERY interesting about the high-hum with no hole in it. Maybe your truck is a very early production, before they came on-line with two floor humps.

It should be a pretty easy matter to fix--just find a low-hump trans tunnel and bolt it in. I've got a high-hump for my '62 with a 4spd, and I'm going to swap in a later 4spd so I'll be swapping in the low hump tunnel/cover. Simple bolt-in.

If you do end up finding a low-hump cover, please let me know as I would like to buy your high-hump without the shifter hole...I've got some ideas for the interior of my Suburban, and a high-hump cover fits into that. Not having a hole to weld shut would be a bug help.

-Brad

that's cool i didn't know the low humps unbolted. i never looked that close. i have taken several of the high humps out all mine are those. i had a 66 with a low hump it was round. the others are square and flat don't know if they are actually higher ot just bigger across the top. if they are interchangable how could you tell if someone unbolted one and bolted in another? on my 63 it had metal around the windows, bought one from another truck and it didn't. oh well i'm not that picky. hr

I haven't had mine out yet...I'm assuming there's some seam sealer or a gasket between the hump and the floorpan, along the mating flange, but I don't know for sure yet. What it looks like to me is that the firewall-end of the trans tunnel is high. The high hump comes right off there and continues back toward the seat, pretty much the same height all the way.
The low hump is stepped up to bolt to the firewall-end, and then drops to the very low profile, continuting towards the seat. It looks like the opening in the truck body/floor is the same regardless, just the cover over the transmission is different. From looking and studying mine, I'm anticipating a direct bolt-in when I change to the smaller transmission.
-Brad