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54 standard trans #403459
02/12/18 10:07 PM
02/12/18 10:07 PM
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newjersey
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stude Offline OP
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newjersey
How do I distinguish the 54 standard trans from the earlier 49-52,my trans has GM 49 cast into the housing at the top of the trans,would this signify a 1949 trans?thanks in advance for any info.

The Filling Station 1949-54
Re: 54 standard trans [Re: stude] #403460
02/12/18 10:19 PM
02/12/18 10:19 PM
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West Allis,Wi.
Chev Nut Offline

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The ID nouber is STAMPED into the case, left (drivers) side next to and in front of the cover -kind of down low.

If the first letter is a M or S it is a 1953 or 1954 trans.

If it is an A-B-C or D it is a 1949.

Last edited by Chev Nut; 02/12/18 10:30 PM.

Chevgene
Re: 54 standard trans [Re: Chev Nut] #403487
02/13/18 07:24 PM
02/13/18 07:24 PM
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newjersey
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stude Offline OP
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Chevgene,number stamped into front of case reads GA170526,sure appears to be a G,could it be a C? definitely not a M or S,I suspect it is a 49-52 trans,what is your opinion? thanks in advance.

Re: 54 standard trans [Re: stude] #403488
02/13/18 07:47 PM
02/13/18 07:47 PM
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West Allis,Wi.
Chev Nut Offline

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I agree, it is a 1949-1952 tranmission. The 1953 transmission had a few improvements including two rows of needle bearings between the main drive gear and main shaft to cure the jumping out of high problem the previous moels had as well as the cluster gear having needle bearings rather than brass bushings.
In mid 1953 more improvements were made in the transmission including tightening up the various tolerances to reduce clutch chatter and gear rattle, making the 1954 unit the best possible choice.


Chevgene
Re: 54 standard trans [Re: Chev Nut] #403489
02/13/18 08:58 PM
02/13/18 08:58 PM
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Hendersonville, N.C.
bobg1951chevy Offline

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Originally Posted by Chev Nut
I agree, it is a 1949-1952 tranmission. The 1953 transmission had a few improvements including two rows of needle bearings between the main drive gear and main shaft to cure the jumping out of high problem the previous moels had as well as the cluster gear having needle bearings rather than brass bushings.
In mid 1953 more improvements were made in the transmission including tightening up the various tolerances to reduce clutch chatter and gear rattle, making the 1954 unit the best possible choice.


The '54 will interchange into the '49 to '53 ?


1951 Chevy Styleline Deluxe 2 door sedan. Purchased in 2000.
1951 Chevy Styleline Deluxe Sport Coupe. Purchased in 2014.
1969 Chevy Corvair 500 Coupe. Purchased in 2017.

Re: 54 standard trans [Re: stude] #403490
02/13/18 10:17 PM
02/13/18 10:17 PM
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West Allis,Wi.
Chev Nut Offline

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The 1952-1954 CASE does not have the bolt holes in the rear for the 1949-1951 type mount. The 1952-1954 is bolted to the mount by the rear extension rather than the case. Some of the 1952-1954 cases have the dimples that could be drilled and tapped for mount holes.


Chevgene
Re: 54 standard trans [Re: Chev Nut] #403493
02/13/18 11:00 PM
02/13/18 11:00 PM
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Hendersonville, N.C.
bobg1951chevy Offline

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Originally Posted by Chev Nut
The 1952-1954 CASE does not have the bolt holes in the rear for the 1949-1951 type mount. The 1952-1954 is bolted to the mount by the rear extension rather than the case. Some of the 1952-1954 cases have the dimples that could be drilled and tapped for mount holes.


Thanks Gene.


1951 Chevy Styleline Deluxe 2 door sedan. Purchased in 2000.
1951 Chevy Styleline Deluxe Sport Coupe. Purchased in 2014.
1969 Chevy Corvair 500 Coupe. Purchased in 2017.

Re: 54 standard trans [Re: stude] #403494
02/13/18 11:01 PM
02/13/18 11:01 PM
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merrimack nh
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The 52-54 extension can be mounted on the 49-51 transmission to install a 49-51 tranny in a 52-54 . Checking as posted above by Chevnut will help to verify the correct identity of the transmission.


Steve D
Re: 54 standard trans [Re: stude] #403497
02/13/18 11:42 PM
02/13/18 11:42 PM
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West Allis,Wi.
Chev Nut Offline

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I hesitated about adding that as I don't recommend using the '52 and prior transmission in a 1953-54 car.


Chevgene
Re: 54 standard trans [Re: stude] #403498
02/13/18 11:51 PM
02/13/18 11:51 PM
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merrimack nh
m006840 Offline

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I thought it might be good to know so if someone is looking for a tranny for a 53-54 they don't end up with an earlier one .


Steve D
Re: 54 standard trans [Re: stude] #403499
02/14/18 12:55 AM
02/14/18 12:55 AM
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West Allis,Wi.
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Good thinking


Chevgene
Re: 54 standard trans [Re: stude] #403571
02/15/18 08:12 PM
02/15/18 08:12 PM
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Posts: 16
newjersey
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stude Offline OP
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OK I THINK I UNDERSTAND,THE TRANS I HAVE JUMPS OUT OF GEAR IN HIGH AFTER SUSTAINED HIGHWAY SPEED (50-55 MPH.) THE TRANS MOUNT IS THE REAR EXTENSION BUT IT HAS DRILLED AND TAPPED HOLES UNDER THE CASE ITSELF WHICH APPEARS IT WOULD BOLT TO A MOUNT,THANKS,I SHIMMED THE DETENT SPRINGS FOR MORE PRESSURE ON THE DETENT BALLS,IF THIS DOESN'T WORK OUT I WILL LOOK FOR THE CORRECT TRANS>


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