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Old 01-21-2017, 02:54 AM   #1
roert
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Default transmission

What are the differences between 1928 and 29 30 31 gearboxes?
With pictures would be great
Maybe I want to install a Mitchell transmission
thank you
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Old 01-21-2017, 04:16 AM   #2
Tom Wesenberg
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Default Re: transmission

Until near the end of 1928, the tranny and clutch were the multiplate style. This mean the starter drive, bellhousing, flywheel, pedals, pedal shaft, and tranny case and input shaft were all different from the later single plate clutch. Many with the multiplate like it and say it's a bit smoother engagement.
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Old 01-21-2017, 04:56 AM   #3
Mike V. Florida
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Default Re: transmission

Quote:
Originally Posted by Tom Wesenberg View Post
Until near the end of 1928, the tranny and clutch were the multiplate style. This mean the starter drive, bellhousing, flywheel, pedals, pedal shaft, and tranny case and input shaft were all different from the later single plate clutch. Many with the multiplate like it and say it's a bit smoother engagement.
Other wise they are the same gears and gear box. The handles differ between the 20's and 30's.
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File Type: jpg Shift lever.jpg (37.7 KB, 37 views)
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Old 01-21-2017, 10:20 AM   #4
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Default Re: transmission

internal on the early ones need spacers/ thrust bearings put on the main shaft to keep the main cluuster in the center, later on they became part of the case casting itself. Early ones use a fat lock plate to hold the main shafts in place while the later went thinner. I think the case itself is the same externally...
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Old 01-22-2017, 12:24 AM   #5
Mike V. Florida
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Default Re: transmission

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Quote:
Originally Posted by Mike V. Florida View Post
Other wise they are the same gears and gear box. The handles differ between the 20's and 30's.
Let me clear this up a little more as my answer was a little short.

There were two transmission cases. The first case
was used to mid 1928 and was distinguished by a
reverse idler gear shaft with a 1-318"diameter wide
collar visible at the left rear of the transmission
case. The second case was used for the remainder
of production. Although there were several internal
changes in this transmission case, the outward
appearance was the same. Initially the case used a
1 I 4" x 1-7 I 8" countershaft and reverse idler shaft
retainer at the rear of the case. This retainer was
changed to 118" x 1-314" in November 1929 and the
exposed ends of the shafts were also redesigned.

Three gear shift housings were used:
Beginning until June 1928 - No provision for
mounting an emergency brake lever.
June 1928 through July 1929-With the addition of
the separate emergency brake system, provision
was made for mounting the emergency brake
lever forward of the gear shift.
August 1929 through end of production- The
emergency brake lever was mounted on the
passenger side of the gear shift housing.

There are early and late bearing retailers and oil baffles as well.
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