646-75lbh Restoration

[Spike188]

This morning I got around to taking the transaxle to a high-end welding shop that have used for major repairs over the years.It turns out that the scheduling technician a wheelhorse collector which led to over the top service. Between keeping the housing stub hot and cooling slowly and limited access to the area needing repaired, He advised against welding.

What the tech pointed out is that there can be a bit of shoulder left to stop the bushing against.

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The approach now will be milling the bushing location round and concentric, after which a custom oilite bushing will be turned.

[DavidBarkey]

Due to the reduced material on the pressure side of new bushing , I would recommend making a couple of heavy band clamps to clamp around the bearing area and spreading the load to the non-pressure side of the axle tube . If it was 200 , or 400 series it would not matter , but because it is a BH carrying a large load all the time I think it would be prudent .

[Spike188]

@DavidBarkey I like that idea better than machining the exterior of the axle housing and sleeving it. My concern with machining a sleeve is making a stress relief taper where the sleeve meets the webbing on the housing.

[DavidBarkey]

@DavidBarkey I like that idea better than machining the exterior of the axle housing and sleeving it. My concern with machining a sleeve is making a stress relief taper where the sleeve meets the webbing on the housing.

I am thinking this type of clamp only with 2 bolts and wider .

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Using this stuff between clamp and housing will fill irregularities between clamp and housing for better load dispersal and seal out moisture ei rust .

[Toolslinger]

I think you'd have a better long term fix with a sleeve. You don't need much really. I'd think 2-3" would be enough to support your new bushing. I think the webbing starts further back than that. A shrink fit sleeve is going to be a lot stronger, and cleaner than a clamp.