Transfer case rebuild, and a question

[Jason Mills]

I have successfully made it through the disassembly, cleaning and most of the prep work (I think) of re building a transfer case. Getting close to the point of first re assembly and adjustment, and I realized there is a part which I don't know where it belongs.

It appears to be a spacer, or super thick shim. It measures .065 thick. I want to guess it goes inside the idler gear, but that is just a wild guess.

[Frank Irons]

I have successfully made it through the disassembly, cleaning and most of the prep work (I think) of re building a transfer case. Getting close to the point of first re assembly and adjustment, and I realized there is a part which I don't know where it belongs.

It appears to be a spacer, or super thick shim. It measures .065 thick. I want to guess it goes inside the idler gear, but that is just a wild guess.

Sounds too thick for idler assembly. What are the ID and OD dimensions?

Frank

[Gordon Maney]

I have successfully made it through the disassembly, cleaning and most of the prep work (I think) of re building a transfer case. Getting close to the point of first re assembly and adjustment, and I realized there is a part which I don't know where it belongs.

It appears to be a spacer, or super thick shim. It measures .065 thick. I want to guess it goes inside the idler gear, but that is just a wild guess.

Move carefully, grasshopper. These are important matters.

Look at your exploded view....

[Jason Mills]

Frank,
Just getting home from a short trip. I will get the OD and ID numbers tomorrow and post them.

Gordon,
Maybe I need to get a Parts Manual? I do have the publication that Greg Coffin/The Highland Chassis Company published, which has diagrams, but it is not quite as detailed as a parts manual.

[Gordon Maney]

Frank,
Just getting home from a short trip. I will get the OD and ID numbers tomorrow and post them.

Gordon,
Maybe I need to get a Parts Manual? I do have the publication that Greg Coffin/The Highland Chassis Company published, which has diagrams, but it is not quite as detailed as a parts manual.

Parts or service; either would have an exploded view.

[Gordon Maney]

Or this, a scan I used for an article in Power Wagon Advertiser.

[Gordon Maney]

Take 2. The text is not very clear, but I think you can read it.

[Jason Mills]

Thank you Gordon.

How enjoyable it is to look at the images in a parts book. The detailed layout in some small way restores order to the chaotic world.

[Charles Talbert]

Based on your description, I would say your part in question is the input shaft outer thrust washer. There are 2 used, one is item "AV" the other is item "V", they are called something different, but the 2 parts are identical. The only other possibility I can think of is the splined thrust washer used on the other side of the 2-speed gear, also on the input shaft.

[Jason Mills]

I measured the splined thrust washer first, and found it to be 2.31" OD splined ID and .152" thick.

The other thrust washer is 2.30"OD, 1.40" ID, and .154" thick.

The spacer in question is 1.87" OD, 1.643" ID and .064" thick. One end is a bit shiny and shows some wear, the other three sides are a dull brown tarnished look.

edit: could it be "AY" in the parts diagram?

[Frank Irons]

I measured the splined thrust washer first, and found it to be 2.31" OD splined ID and .152" thick.

The other thrust washer is 2.30"OD, 1.40" ID, and .154" thick.

The spacer in question is 1.87" OD, 1.643" ID and .064" thick. One end is a bit shiny and shows some wear, the other three sides are a dull brown tarnished look.

edit: could it be "AY" in the parts diagram?

Yes, it looks like that may the one. Jason, you should get the M37 powertrain manual, I believe it is TM9-8031 - something. Rebuild info, wear limits, and procedures are all there. Used this manual for years after Paul Caudell recommended to me. I believe it is available on CD also.

Frank

[Jason Mills]

Yes, it looks like that may the one. Jason, you should get the M37 powertrain manual, I believe it is TM9-8031 - something. Rebuild info, wear limits, and procedures are all there. Used this manual for years after Paul Caudell recommended to me. I believe it is available on CD also.

Frank

That is a good idea Frank, Thank You for that suggestion. Now I will go find one.

[olgraybeard]

http://www.vintagepowerwagons.com/vm...l-products.htm
http://www.military-manuals.com/mili...m37B1-m42.html

[Charles Talbert]

With those dimensions it can only be the spacer that separates the 2 rows of loose needle rollers. That is not a thrust washer, but simply keeps the needles from crashing together end to end. It is however strange that only one side shows wear, generally both sides that contact the roller ends will display the same appearance and similar wear patterns. I would suggest you look at things a little closer if only one side shows wear, that is an abnormal pattern for sure.

[Jason Mills]

With those dimensions it can only be the spacer that separates the 2 rows of loose needle rollers. That is not a thrust washer, but simply keeps the needles from crashing together end to end. It is however strange that only one side shows wear, generally both sides that contact the roller ends will display the same appearance and similar wear patterns. I would suggest you look at things a little closer if only one side shows wear, that is an abnormal pattern for sure.

Will have a close inspection.. yet I 'think' I only saw one side as shiny