Posted: Sun May 06, 2018 1:28 am Post subject: Main shaft gear style
I see there are 2 different types of main shaft gears for the D18, both are the same gear count and practically identical but one style has a square shoulder on the backside the other a 45 degree chamfer. (Wish I could post pictures) My old gear that came out is the 45 degree style. I ordered a NOS gear that was the same as mine and made sure I was ordering that style but when it came in the mail the guy gave me the one with the machined shoulder on the back which is not what I wanted.Can these be interchanged or is there a reason they are different I hate to go through the hassle of returning it. Thanks Jason _________________ Jason
1953 M38A1
Since technically there are no main shafts or main shaft gears listed in the Parts Manual we should start by properly ID'ng the correct gear. The best way to do that is with the page from the IPL (Parts Manual).
Not sure why you cannot post photos but I'l at least get you started with one of our albums here on this web site:
Sorry Wes I should have gone by the parts book. It would actually be part "Z" in your photo, Spur, Gear WO-A10469. It appears there are 2 different styles only thing different is the backside. I just went by what the distributors are calling it. Thanks for the album I will try and figure out how to post pictures next time I get on my computer as I do most of my stuff through my phone and cant upload them. _________________ Jason
1953 M38A1
3020-00-737-5132 MCRD (Master Cross Reference Data)
Mfg. Part # Mfg. Name CAGE RNCC RNVC ISC MSDS SADC DAC HCC
18-8-19 DANA CORP 95019 5 2 2
18-8-19 T AND J INDUSTRIES INC 03716 5 9 2
18-8-19 DANA CORP 72447 5 2 2
7375132 U S ARMY TANK AUTOMOTIVE COMMAND 19207 3 2 2
A10469 SPALLA INC 22852 5 9 2
A10469 AM GENERAL LLC 34623 5 2 2
J2A11 LIBERTY VENTURES INTI LLC 79410 5 9 2
TG469 MARMON GROUP INC THE 98435 5 2 2
3020-00-737-5132 Characteristics
MRC Requirement Statement Characteristics
CWPP PRESSURE ANGLE 20.0000 DEGREES
SR-5 DESIGN CONTROL REFERENCE 7375132
AGJS PITCH DIAMETER 3.7143 INCHES NOMINAL
CWNH TOOTH FORM STANDARD
CWYD FIRST GROOVE NOMINAL DIAMETER 2.0620 INCHES SECOND END
CWPZ HELIX ANGLE 30.0000 DEGREES
STYL STYLE DESIGNATOR PROTRUDING HUBS
SR-5 THE MANUFACTURERS DATA
SR-5 MANUFACTURERS CODE 19207
FEAT SPECIAL FEATURES GR00VED HUB IS SPLINED,15 TEETH,20 DEG PRESSUR ANGLE
CWTX HUB NOMINAL DIAMETER 1.750 INCHES FIRST END
AJLA TEETH QUANTITY 26
ANTP BORE STYLE STRAIGHT SPLINE BOTH ENDS
CWXY FIRST GROOVE NOMINAL WIDTH 0.1250 INCHES SECOND END
CWNM TOOTH DIRECTION LEFT
AAQL BODY STYLE WEBBED, SOLID
CWMW TEETH TYPE SINGLE HELIX
CWTG COUNTERBORE NOMINAL DIAMETER 1.6250 INCHES SECOND END
ABSA SPLINE QUANTITY 6 BOTH ENDS
How does the gear you have measure up to these listed dimensions? Try to get photos up showing the physical difference between your old and new gears. It will make this a lot easier. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
OK thank you Wes for correcting the photo link I was having a hard time with that and I couldn't figure out how to make sure the photo wasn't over 250k.
So can either one of these 2 styles be used in the D18 or is there a reason that one is machined differently on the backside than the other is it for clearance? One is specified for CJ5s and the other is M38A1 models but they are identical as far as gear count and size. _________________ Jason
1953 M38A1
What are the part numbers and to which does each part number apply? _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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