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Old 22-06-18, 19:39
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Jordan Baker Jordan Baker is offline
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Spent yesterday and today painted the transfer case parts. First in DOM16 ( Cnd version of POR15). Then in tie coat primer. Today was the final colour of SCC2. I also picked up the order of Speedi Sleeves and oil seals. I’ll give the paint a few days to harden up before installing the seals and the sleeves. Next week I should have the bearings and cones. I also had all the fasteners from the case in a tumbler with blasting grit in order to clean them up. I left it running for about 20hrs. Followed up with a quick buffing on a brass wire wheel they are good to go.
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Old 22-06-18, 21:19
Bob Carriere Bob Carriere is offline
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Default Congrats..........

Fantastic job!!!!!!!
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Old 27-06-18, 01:17
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All my new bearings arrived yesterday so I made a quick run to the USA to pick them up. All went smoothly crossing the boarder both coming and going and I was home in no time.

Today I began disassembling the shafts and gears to clean them up. All has gone well except for the idle shaft. I don’t have the special tool for removing the speedometer gear. It’s tool J1737. I suspect it is simply a tool shaft that has matching female threads of the speedometer gear to screw on. I did try a bearing removal tool and it chipped part of it.

I’m not sure if I’ll need to source a new one or not.

I believe the GM# is 1811722

I see from the LWD site they have a Ford part that looks the same. Part # C01Q-17285-A. Does anyone know if they cross over?
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Old 27-06-18, 04:37
Grant Bowker Grant Bowker is offline
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Your image of the tool is the one I see in MB-C2. MB-C1 shows a 2 armed puller, but gives the same tool number as shown in your image. Odd.
Based on the image, I would have interpreted the gear involved as being the spiral type mounted to the end of the transfer case idler shaft. I'm not expert but would interpret this as the driving gear and the smaller gear that engages both this one and the speedometer cable as the driven gear. (Both fall in parts group 4.337 so the diagram doesn't make it clear which is which.)

The gear I think of as driving, Chevrolet number1809534, is listed in a Ford parts book as equivalent to C01Q-17285-A and is described as having 4 teeth while a couple of other driving gears with only Ford part numbers are described as having 5 teeth. I think this is the gear you mention on LWD's site: https://www.lwdparts.com/product/gear-speedo-driven-2/ which seems to be the one listed as being common to the Chevrolet. LWD have another listing for a speedometer gear, driven that is the other part of the speedometer gearing https://www.lwdparts.com/product/gear-speedo-driven/ Be cautious with terminology to be sure you get what you need.
C01Q-17285-A is listed as appling to F15A, F30, F60S, L, H and FGT. 1809534is listed in Chev parts books as suiting C15A, C30, C60 S, L and X and CG. I didn't check any of the armoured vehicle books.

This gear is listed in the C15A0-04 parts list as one of the * parts, "peculiar to CMP vehicles", but is not so marked in the C60X-04 list. Puzzling.

Most of the non-CMP parts books I have seem to treat the driving and driven gears as items to be ordered as a matched pair rather than individual gears. These sets are all 6 digit numbers instead of 7 digit, suggesting earlier the CMP parts may be later (possibly by being designed to match the transfer case shaft instead of the transmission output shaft as in 2WD civilian pattern trucks. The Modified Conventional Pattern Chevrolets seem to follow the civilian method of treating the gears as "gear unit, speedometer drive".

How badly damaged is your gear? Any chance the driven gear rides on the part that escaped damage?

Last edited by Grant Bowker; 27-06-18 at 04:53.
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Old 27-06-18, 06:00
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Thanks for the help. My bad on the other part number. I read off he wrong line in the parts book when I was typing out my post.

The worm gear on the end of the idle shaft should be GM 1809534 Gear Speedometer Drive ( 4 teeth). From what you have, this part is the same as the Ford C01Q-17285-A?

Also here is the picture of different tool for removing the worm gear.


I stopped off at the shop tonight and we might be able to make a copy of the puller as found in MB-C2. He didn’t think where I had the small chips would be any issue as the other gear should just be riding in the middle.
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Old 27-06-18, 06:08
rob love rob love is offline
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There does not appear to be anything special about that puller. I'm pretty sure I have that in both OTC and snapon.

I think a small to medium bearing puller (the plate type that has two halves) and a little heat from a propane torch would make quick work of that job, and provide much more support to the gear.
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Old 27-06-18, 06:11
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I tried the plate type of bearing/gear remover and it quickly chipped the bottom of it so I stopped. I’ll try some heat on it tomorrow.
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