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M-Series Dodge M37, M42, M43, V41, M601 M37 3/4 ton cargo truck, M42 command truck, M43 ambulance, V41 telephone maintenance truck, M601, and any variants

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Old 03-20-2017, 03:19 PM   #1
RFranklin
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53 M37 still pops out of first gear under load?

Ok guys, looking for some of your experience to answer a question. I have new bearings in the stock c88671 transmission behind the stock 230 six engine. This past weekend I did the machining to repair the loose shifter pin and made a new cone washer for the spring underneath the shifter ball. Much better but under a load such as going up a good hill in four low it will still slowly walk out of first gear. I have also installed new shift rails in the trans top. What am I missing?
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Old 03-20-2017, 09:17 PM   #2
Cheyenne Dave
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You probably did this, but did you replace the shift-rail detent springs?

CD
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Old 03-21-2017, 05:48 PM   #3
RFranklin
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I did not as I could not locate any. They appeared to be the same length and appeared to be same strength but maybe that is it. Any idea where to find some?
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Old 03-22-2017, 08:20 AM   #4
Cheyenne Dave
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If you have already inspected them and they are in good shape, it would seem you have done your duty. I assume the detent balls had no apparent wear either.

It was a long shot, but I thought I would throw it out there.

CD
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1949 B-1 PW (Gus)
1955 C-3 PW (Woodrow)
2001 Dodge 2500 (Dish...formerly Maney's Mopar)
1978 Suzuki GS1000EC (fulfills the need...the need for speed)
1954 Ford 860 tractor
1966 Chrysler LS 16 sailboat (as yet un-named)
UVA UVAM VIVENDO VARIA FITS
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Old 03-25-2017, 05:28 AM   #5
John S
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Did you notice if the plastic inserts on the shift forks are in good shape ? I have seen some cases where the are missing.
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