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transmission cover on floors
#1385622 Mon Nov 23 2020 07:56 PM
Joined: Aug 2018
Posts: 214
M
Shop Shark
Im curious about the transmission cover that is in the center of the floor in the A.D. trucks. Why were they originally there? Most of the vehicles I've owned in my life have had manual transmissions, and none of them had overhead transmission covers until this 1953 truck. Im wondering about this mostly because I just bought a cab that was a lot better than the one I had, but somebody has cut out the center of the floor and installed a big hump to cover an automatic transmission. I'm in the process of removing that now. Other than the area in the center that's cut out, the rest of the floor is pretty decent. It would be much easier and cheaper to just weld a flat patch into the floor than it would to reconstruct the opening for the tranny panel and buy a cover. But I wouldn't want to do that if there is some good reason for the tranny cover panel to be there. Please advise. Thanks

Re: transmission cover on floors
Mike Burns #1385624 Mon Nov 23 2020 08:12 PM
Joined: May 2015
Posts: 3,183
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
I believe Chevy put that transmission cover in for a couple reasons: Access to the top cover of a 4-speed tranny and so they didn't have to build two floor assemblies (one for 4 speed on the floor and another for 3-speed without floor shifter.)
Unless you want to put it back to "original" configuration, there's no reason you couldn't just weld a flat patch over the opening if you're running a stock 3-speed, as it doesn't need a shifter hole or access to the top of the tranny.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: transmission cover on floors
Mike Burns #1385637 Mon Nov 23 2020 09:53 PM
Joined: Mar 2010
Posts: 202
B
Curmudgeon
I've read in the forum where the original engine and 3-speed transmission could be removed bolted together. The floor cover was removed.

Re: transmission cover on floors
Mike Burns #1385646 Mon Nov 23 2020 10:33 PM
Joined: May 2015
Posts: 3,183
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
I think the engine & 3-speed could be removed bolted together even if the floor cover was left in place. There's not much difference in room with cover on or off.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: transmission cover on floors
Mike Burns #1385647 Mon Nov 23 2020 11:00 PM
Joined: Sep 2001
Posts: 30,784
ace skiver
buoymaker & klhansen

" . . . the engine & 3-speed could be removed bolted together even if the floor cover was left in place . . ."
" . . . the original engine and 3-speed transmission could be removed bolted together. The floor cover was removed."

Presumably, you are referring to removing the engine/transmission through the engine compartment?
With the radiator and probably the hood removed?


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: transmission cover on floors
Mike Burns #1385655 Mon Nov 23 2020 11:58 PM
Joined: May 2015
Posts: 3,183
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Service manual says that the engine can be removed with the tranny attached after removing radiator and hood. The transmission floor opening only needs to be removed with a floor shifter transmission (obviously the shift lever would have to come off).
I was just pointing out that there's not much difference in room with or without the floor cover in place.
I've only removed the engine tranny from the bare chassis (no front clip or body).


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: transmission cover on floors
Mike Burns #1385983 Thu Nov 26 2020 06:10 AM
Joined: Dec 2014
Posts: 742
M
Shop Shark
I've never encountered a purpose for the floor access panel, even though I left mine intact.

Weld that thing over!


1949 Chevy Panel Truck
Re: transmission cover on floors
MiraclePieCo #1386002 Thu Nov 26 2020 02:08 PM
Joined: Sep 2001
Posts: 30,784
ace skiver
Originally Posted by MiraclePieCo
I've never encountered a purpose for the floor access panel, even though I left mine intact.

Weld that thing over!

step 6 on the right of this page in the Shop Manual - [chevy.oldcarmanualproject.com]no need to get under (crawl under ?) the truck (or have the truck on a lift/jack-stands)?

transmission installation (on right side of page - [chevy.oldcarmanualproject.com] from above the floor - through the floor opening - again: no need to get/crawl under the truck, etc.

removal of the 4-speed is not clear (through the floor, or, from below) [chevy.oldcarmanualproject.com]
however:
install the four-speed transmission though opening in the floor (with a "crane" ?) [chevy.oldcarmanualproject.com]


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: transmission cover on floors
Mike Burns #1386025 Thu Nov 26 2020 04:10 PM
Joined: Feb 2019
Posts: 1,150
P
AD Addict
I removed/reinstalled my ‘52 3100 3-speed thru the floor with a engine lift and I highly recommend it. You can access most of what you need from top. The two bottom bolts are inside the clutch housing. I even filled the tranny from the top. Much easier on my back and neck.

Now, if I had a lift and tranny jack, that would be a different story.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: transmission cover on floors
Mike Burns #1386199 Fri Nov 27 2020 07:35 PM
Joined: Apr 2002
Posts: 1,791
F
Fox Offline
A teacher, but always an apprentice.
I’d leave it there too. I will be doing trans work on my 51 next summer and I fully expect that hole will come in handy. It has in the past.

Last edited by Fox; Fri Nov 27 2020 07:35 PM.

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