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4 speed question
#1370854 Mon Jul 27 2020 03:29 PM
Joined: Mar 2019
Posts: 22
S
Swami29 Offline OP
New Guy
My truck is a 1953 3100 pick up. It has the 4 speed transmission with floor gearshift. When pulling the engine out of the vehicle I was having a difficult time getting the engine and tranny out as one unit even after removing the transmission support cross-member. I eventually just unbolted the tranny and dropped it separately and the engine came right out. I would like to install the transmission on the engine and put it back in the truck as a unit if possible ,but don`t want a fight getting it in. From what information I have found so far it looks like the three speed engine and trannys go right in no problem,anyone have advise on the 4 speed?


1953 3100 Pu
Re: 4 speed question
Swami29 #1370857 Mon Jul 27 2020 03:36 PM
Joined: Feb 2004
Posts: 21,005
H
Boltergeist
You might be able to get the engine/trans assembly installed together if you take the top cover off the transmission, but it's much simpler to install the engine and bellhousing as a unit and then put the transmission in. An engine lift through an open door or a 4 X 4 timber across both window openings and a cable come-along makes it a simple job to lift it into place. Removing the crossmember was a huge mistake, as it allows the frame rails to spread out. The crossmember is a structural brace for the rear spring mounts.
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: 4 speed question
Swami29 #1370862 Mon Jul 27 2020 03:45 PM
Joined: Mar 2019
Posts: 22
S
Swami29 Offline OP
New Guy
Thank you. I will get that transmission brace re-bolted back in pronto!


1953 3100 Pu
Re: 4 speed question
Swami29 #1370868 Mon Jul 27 2020 04:15 PM
Joined: Mar 2014
Posts: 126
G
Shop Shark
I think there might be a misunderstanding on which crossmember you're each talking about. Removing the one rear of the transmission that's bolted to the frame shouldn't be a problem. There's been a lot of discussion in the forums that many trucks don't even have those crossmembers, and a belief by many they're not needed.


Greg Brown
'49 Chevy 3100
Re: 4 speed question
Swami29 #1370872 Mon Jul 27 2020 04:33 PM
Joined: Feb 2004
Posts: 21,005
H
Boltergeist
Some people try to remove the crossmember where the rear motor mounts attach, which is riveted in. That's the one that allows the frame to distort. Removing the one further back that's bolted in is not a problem.
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: 4 speed question
Swami29 #1370879 Mon Jul 27 2020 05:06 PM
Joined: Sep 2001
Posts: 30,435
ace skiver
GM/Chevrolet-Truck considered that cross-member at the rear of the transmission to be necessary up through the 1953 light (3100) trucks (for all transmissions)

The cross-member at the rear of the engine was changed in 1954 Chevrolet Light Trucks. That change allowed the elimination of a transmission rear-cross member in 1954, except with the Hydra-Matic transmission option.


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: 4 speed question
Swami29 #1370881 Mon Jul 27 2020 05:24 PM
Joined: May 2001
Posts: 1,522
W
Shop Shark
I installed my 261 first and then used a transmission jack with pitch-yaw-roll adjustments. It was super easy, even for me.


1948 3/4-Ton 5-Window Flatbed Chevrolet [sandeace.com]

28 Years of Daily Driving but now on hiatus. With a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Re: 4 speed question
Swami29 #1370947 Tue Jul 28 2020 02:19 AM
Joined: Jan 2002
Posts: 2,096
C
Shop Shark
With the above, it's way too easy to first install the motor and then the gearbox. I use a engine hoist thru the passenger door, bolted to the top of the gearbox to raise or lower it, from/to the floor.


Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck or VW camper, I'm fishing with the wife or smoking Salmon.
Re: 4 speed question
Swami29 #1370968 Tue Jul 28 2020 03:56 AM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
We talked about that last year and decided that trucks up to including 53 with enclosed driveshaft (3100) had the rear crossmember from the factory, open driveshafts ie 3600 and above didn't.

Last edited by sstock; Tue Jul 28 2020 03:59 AM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration

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