is my 1976 small or big hump for carpet replacement?

[88Jimmy4x4]

Need to order carpet, all the catalogs say floor shift manual trans and 4x4 are big hump and 2wd auto are small hump. However I have heard all bolt in humps are big....Im confused because I clearly have a bolt in hump and cutout for standard trans if needed.

1976 GMC Sierra C15 2wd TH350 trans with 350 VIN L engine

Is there another way to tell?


Heres a view looking from underneath my truck

[J Knight]

JB, it looks like your truck was originally a 4spd granny. I think thats a high hump.

[88Jimmy4x4]

anything is possible, but theres no indication of a clutch pedal or any linkage anywhere

[J Knight]

The hump looks totally factory but the patch that is rivited in doesnt.

[88Jimmy4x4]

still confused

[donut]

My guess would be high hump because it's bolted in. It's only a guess though.

Look here, http://forum.73-87chevytrucks.com/sm...c,11838.0.html

[J Knight]

LMC shows two carpet options, a 2wd low hump, and a 2wd/4spd or 4wd high hump. My guess is also high hump.

http://www.lmctruck.com/icatalog/cc/full.aspx?Page=121

[76stepsidechevy]

looks like a high hump, can you get a pic from the inside?

[88Jimmy4x4]

Originally Posted by donut

My guess would be high hump because it's bolted in. It's only a guess though.

Look here, http://forum.73-87chevytrucks.com/sm...c,11838.0.html

Thanks, but the pics arent working

Originally Posted by J Knight

LMC shows two carpet options, a 2wd low hump, and a 2wd/4spd or 4wd high hump. My guess is also high hump.

http://www.lmctruck.com/icatalog/cc/full.aspx?Page=121

I think it may be high, previous owner replaced carpet and it never fit correctly, like it was stretched away from hump and didnt contour floor.

Originally Posted by 76stepsidechevy

looks like a high hump, can you get a pic from the inside?

Im gonna remove carpet/seat this weekend and take an inside pic

[donut]

Pics worked for me (even on dial-up) and they're in his tech section so they're pretty much locked down. You may have to wait for them to load though.

When you post up a pic of yours, someone will help identify exactly what you have.

[xrcr]

This is a pic from a 76 3/4 2wd manual. I called this high hump. Not sure if this helps....

[88Jimmy4x4]

Originally Posted by xrcr

This is a pic from a 76 3/4 2wd manual. I called this high hump. Not sure if this helps....

yes that helps, its just like mine even same color


Thanks for the help everyone


Keith.....what company did you order your vinyl floor from?

[Keith Seymore]

Capt Kaos.

K

[Keith Seymore]

2wd auto/ 2wd manual column shifted = low hump

2wd manual floor shifted (both M20 and My6); and 4wd = high hump

As others have said - looks like you've had some floor shifted manual action at some point in the past.

What makes you think the truck was originally a TH350? Because that's what's in it now? Any other indications (brackets and such) that would indicate it was originally a manual trans?

K

[88Jimmy4x4]

Originally Posted by Keith Seymore

2wd auto/ 2wd manual column shifted = low hump

2wd manual floor shifted (both M20 and My6); and 4wd = high hump

As others have said - looks like you've had some floor shifted manual action at some point in the past.

What makes you think the truck was originally a TH350? Because that's what's in it now? Any other indications (brackets and such) that would indicate it was originally a manual trans?

K

well guys looks like my truck was a 4 speed manual trans from factory and got switched to auto at one time.


this the big hump right?

does this look like yours Keith?.....whats this cover plate near brake on firewall?

so this is large hump right?

[donut]

Looks to me like a 2wd high hump, same as pic xrcr posted.
Hole in the floor, clutch? Kinda looks like it as the patch jobs look similar, or at least done at the same time.

[Keith Seymore]

I agree, looks like a 2wd high hump.

I neglected to take any pictures of my bare floor; it's a 2wd high hump (because of the MY6) but not a bolt in.

K

[88Jimmy4x4]

dang I always forget about his store


thanks