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| Coupling Sleeve |
I finally got a chance to check out the Borg Warner Overdrive. It didn't take long to find the culprit. The splines of the coupling sleeve that connects the OD output shaft to the rearend's pinion stub shaft was totally worn out. The spines were completely gone. You can see in the picture that the splines are missing for almost the first inch of the sleeve. This is the second time this part has worn out, although the first time I caught it before a failure left me stranded.
A similar part is used in the Mitchell OD and that part has failed on other Model A's. Mitchell has upgraded their design by putting a grease fitting to help eliminate wear due to dry splines.
I will have to see if this part is available from anyone who might still be selling this unit, if not I will check with my contact at Nashoba Technical High to see if they can make a couple of replacement sleeves.
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| Output Shaft of Overdrive |
The good thing is that the rest of the overdrive is in good working order, so once I get a replacement sleeve this will be a good unit to sell or just keep as a back up.
Happy Motoring
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