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Author Topic: Saginaw Manual Trans Front Bearing Shield  (Read 1441 times)
Posts: 144

1968 L6 Sport Coupe

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« on: January 21, 2008, 07:34:40 PM »

The factory original GM front bearing in my Saginaw 3 speed trans came with a metal shield facing the inside of the transmission. About 10 years ago the bearing was replaced with one without the shield, apparently will no ill effect. Any opinions or comments about the absence or presence of the shield? Thanks, Joe.
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« Reply #1 on: January 22, 2008, 11:25:39 AM »

The primary funciton of seals on a rolling element bearing is to effectively exclude dirt, grit, moisture, and other substances which might harm the bearing during normal use.  More often than not, a sealed rolling element bearing has shields on both sides and is pre packed at the factory.  If the front bearing only had a shield on the inboard side, its function would have been to reduce contamination to the bearing.  Installing a bearing without shield(s) leaves it open to the elements - a condition that the original GM designer must have been concerned about.  I'd put the original style bearing back in.  Someone was concerned about contaminating the bearing and spec'd out the shield.

Richard Thomas
1969 RS
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