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transmission swap #1311093
Sat May 18 2019 10:36 PM
Sat May 18 2019 10:36 PM
F
frogfarmer  Offline OP
New Guy
Joined: Dec 2006
Posts: 17
Idaho
Will a 4 speed floor shift transmission from a 1948 1/2 ton Advance Design pickup swap into a 1948 Chev Sedan Delivery? The 3 speed column shift transmission with vacuum assist in the delivery is problem ridden. If the swap is simple that's the way we'll go.

Re: transmission swap [Re: frogfarmer] #1311095
Sat May 18 2019 10:53 PM
Sat May 18 2019 10:53 PM
H
Hotrod Lincoln  Online
Boltergeist
Joined: Feb 2004
Posts: 18,551
Dellrose, TN
If the Sedan Delivery uses the same bellhousing as the pickup, the swap will probably be pretty simple. The car transmission had a very different bellhousing bolt pattern than the truck 3 or 4 speed. I'm not sure which driveline components the Sedan Delivery used. There might also be a difference in the length of the torque tube and a different universal joint which would need to be adapted to the 4 speed transmission. The swap might not impossible, but it's probably difficult.
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!
Re: transmission swap [Re: frogfarmer] #1311097
Sat May 18 2019 11:10 PM
Sat May 18 2019 11:10 PM
tclederman  Offline
Boltergeist
Joined: Sep 2001
Posts: 27,911
Jarvisburg, NC
The Sedan Delivery does not use the same clutch/flywheel housing as used in trucks.

The Sedan Delivery uses the car driveline components.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 50 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- 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 engine are not "splash oilers" - this is a splash oiler.
Re: transmission swap [Re: frogfarmer] #1311100
Sat May 18 2019 11:31 PM
Sat May 18 2019 11:31 PM
Justhorsenround  Offline
Grease Monkey
Joined: Apr 2005
Posts: 7,268
El Reno, Okla
The Sedan Delivery while listed in some of the Truck Sales Material is in reality a car. Very little is interchangeable with truck parts.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line" and lock up those on the wrong side of that line.

Re: transmission swap [Re: frogfarmer] #1311104
Sun May 19 2019 12:01 AM
Sun May 19 2019 12:01 AM
tclederman  Offline
Boltergeist
Joined: Sep 2001
Posts: 27,911
Jarvisburg, NC
The 1941-1948 car and Sedan Delivery used the same engine with 9" clutch assembly.
The truck clutch assembly was larger.

My guess is the 1941-1953 216 was the same engine (block/head assembly), with some/many peripherals (bolt-ons) being different.

The car/truck 235 head/block assembly were the same through 1953 (with many peripherals (bolt-ons) being different).
Except for the 1950 and later 235 car engines on Powerglide-equipped cars (hydraulic lifters).


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 50 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- 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 engine are not "splash oilers" - this is a splash oiler.
Re: transmission swap [Re: frogfarmer] #1311107
Sun May 19 2019 12:33 AM
Sun May 19 2019 12:33 AM
C
crenwelge  Offline
Shop Shark
Joined: Jan 2008
Posts: 4,656
Fredericksburg, Texas
Passenger cars from the floor shift days until 1954 used the same bolt pattern. I'm not sure just how the vacuum shift worked, but 60 years ago everyone that had it got rid of it and I'm sure it hasn't gotten any better. In fact a lot of kits were offered to remove the vacuum shift from 1939 through 1948. NOS vacuum shift units appear on eBay quite regularly and right now I see one of the vacuum shift delete kits on eBay. The problem is in the linkage, not the transmission itself.

Re: transmission swap [Re: frogfarmer] #1311116
Sun May 19 2019 02:04 AM
Sun May 19 2019 02:04 AM
H
Hotrod Lincoln  Online
Boltergeist
Joined: Feb 2004
Posts: 18,551
Dellrose, TN
The rubber parts in the vacuum shift cylinder would get sticky and refuse to move smoothly. The fix was simple- - - -run a 6 ounce can of Casite Tune-Up through the shift cylinder by letting the engine vacuum at the cylinder vent suck the liquid through it. Then the same solvent would serve double duty by cleaning carbon off the valve guides. The same procedure also worked well on vacuum windshield wiper motors, BTW!
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!
Re: transmission swap [Re: frogfarmer] #1311134
Sun May 19 2019 10:12 AM
Sun May 19 2019 10:12 AM
R
rickmg  Offline
Shop Shark
Joined: Feb 2011
Posts: 852
michigan
If the 4 speed isn't a sychronized transmission I'd stay with the 3 speed that is sychronized. As stated above do away with the vacuum shift. I'd try Jerry's remedy first tho.

Rick

Re: transmission swap [Re: frogfarmer] #1311155
Sun May 19 2019 03:12 PM
Sun May 19 2019 03:12 PM
P
Pre '68 Dave  Offline
Shop Shark
Joined: Jan 2001
Posts: 4,817
Snohomish,WA,USA
Here is a list of transmission bolt patterns from my blog.

Attached Files
Capture.JPG (51 downloads)

See the USA in your vintage Chevrolet!
My Blog
Re: transmission swap [Re: frogfarmer] #1311195
Sun May 19 2019 09:43 PM
Sun May 19 2019 09:43 PM
F
frogfarmer  Offline OP
New Guy
Joined: Dec 2006
Posts: 17
Idaho
Thank you for the replies and suggestions.
This is a project that I am helping my son with. He would prefer a floor shift. We'll get out the tape measure and take some measurements. The pickup transmission doesn't have the little lever by the knob for shifting into reverse so I'm assuming it isn't a crash box.
If it looks like too much of a project, we"ll try solvent.
Is there another product that is similar to Casite Tune-up?
If neither of the above work out, we'll probably try a vacuum assist delete kit.

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