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Old 05-23-2006, 11:39 PM
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DIY SM465 rebuild?

I'm thinking about doing a basic rebuild of my sm465. I was thinking just bearings, seals, and syncros. The tranny works pretty well except there is a bit of bearing noise at times and it recently developed an oil leak. I hear the sm465 is pretty much always noisy so I'm not too worried about that. I'm replacing the engine and clutch on my truck right now so I figured it would be a good time to freshen up the transmission as well. It's already out of the truck.

I've never rebuilt a transmission before. I am particularly interested in manual transmissions and I'm wondering if this would be a good one to learn on. My question is what do I need to know to do this? What is a good resource for learning? Is there a good book that'll go through the sm465? What special tools will I need?

I'm not afraid of a challenge and I believe I am mechanically adept. However, this truck is my daily driver and I can't afford to have it off the road more than a couple weeks. This can't turn into a big project.

Any help or advice would be appreciated. My options are 1. do it myself, or 2. put it back without a freshen and do it later (probably next year). I do not want to pay somebody to do it because as I mentioned, I find manual transmissions particularly interesting and I want to learn sometime.

81 Grand Prix, 355, 700r4, 8.5" 4.10
64 Oldsmobile Jetstar, all original
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Old 05-24-2006, 12:56 AM
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These trannies are abundant, if you have a couple $ laying around buy one an play with it till you get comfortable with its working and assembly, Then you will be an authority on them and have you a spare. If I'm not mistaken Novak sales a full rebuild kit for it or may have been Advance Adapters cant remember exactly were I seen it at but it was one of the two. These trannies replaced the earlier 420's, If you have a 6.0 first gear model, those cats will pull a house down and are damn bullet proof.
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Old 05-24-2006, 01:58 AM
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This wont take you through the rebuild but you can at least look at it.

A good Chiltons (Black one) or Motors Manual (The blue one) will get you through it pretty easy.

Last edited by 56Maynard; 05-24-2006 at 02:18 AM.
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Old 02-28-2008, 01:17 PM
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Very nice link, Looks like it should help me out quite a bit. I am installing an adapter plate to bolt a Dana 300 transfer case to the back of one of these transmissions, and looks like it has exactly what I needed to know.

Does anybody know of a place that sells actual book manuals for these transmissions? I wouldn't mind having a hardcopy of a bit more indepth DIY
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Old 04-02-2008, 08:17 AM
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Bump... Anybody?
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