Pilot Bearing Fell Out - Pontiac GTO Forum
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post #1 of 8 (permalink) Old 11-18-2012, 08:42 PM Thread Starter
 
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Pilot Bearing Fell Out

Here is a good one. When I dropped the Muncie 4 speed out of my 69 GTO, the pilot bearing literally fell out. This is the first car I have worked on without a bronze bushing, but this doesn't seem normal. I can only find threads about guys struggling to get the bearing out - none with my problem.

I bought a new pilot bearing thinking that the old one was simply the wrong thing, but it is the exact same. It is a tight fit, but slides in and out easily. Shouldn't the bearing be a press fit?

Thanks for the help
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post #2 of 8 (permalink) Old 11-19-2012, 09:20 AM
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Yes, it should be an interferance fit. I would measure the inside diameter of the crank flange....it may be oversized. And, you may have to have a custom bronze bushing machined to fit in that case. Bearings are superior (IMO) to bushings, that's why Pontiac used them in these cars. More expensive to produce, but better end product.
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post #3 of 8 (permalink) Old 11-19-2012, 09:35 AM Thread Starter
 
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Good idea. Thank you. I am swapping in a Keisler 5 speed trans - I couldn't resist the temptation of overdrive. I'll see if Keisler is OK with the bushing, then hope for the best. Do you have any recommendation on the best outfit to custom make a bushing?
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post #4 of 8 (permalink) Old 11-19-2012, 12:18 PM
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I had one made (turned down from a larger one) by a local machine shop one time years back. It was about $8 in labor. Any local old-school machine shop will be able to handle it. They need the exact measurements, though.
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post #5 of 8 (permalink) Old 11-20-2012, 08:08 AM Thread Starter
 
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Thanks. I'll figure something out. I'm excited to see this trans go in, then I will really have something to contribute on the forum. I know guys on here complain about fitment with some of the Keisler packages, but the early mock-up with mine looks promising. I have the RS-600 based on the T-45. It doesn't look like any tunnel modification will be necessary.
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post #6 of 8 (permalink) Old 11-20-2012, 08:41 PM
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Charlie, I am a Journeyman Toolmaker, if you give me exact dimensions I will make you a bushing at no charge, just pay for shipping. PM me if I can help.



Gone....but not forgotten....
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post #7 of 8 (permalink) Old 12-08-2012, 03:24 PM Thread Starter
 
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Alky, I really appreciate the offer, but I ended up getting it figured out a different way. My local machine shop said that since there is no apparent play in the bearing, just put red loctite on it and call it a day. They highly recommended using the bearing.

I got the trans all bolted up. Ill let you know how it works. Keisler is making the driveshaft now.

Thanks for the help gentlemen.
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post #8 of 8 (permalink) Old 12-09-2012, 10:26 AM
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Glad you are getting it all worked out. Definetly let us know when you get her running again!

Good luck.
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