TH400 rebuild tech
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The next picture shows a common roller clutch style drum and a roller clutch on the left, most T-400's will use this style drum. Early units, pre-'71, will have the smooth inner race style drum on the right. 4L80E's also use the "early" style drum and an actual sprag. The stock 16 element sprag is in the center, with the 34 element on the right. | The next picture shows a common roller clutch style drum and a roller clutch on the left, most T-400's will use this style drum. Early units, pre-'71, will have the smooth inner race style drum on the right. 4L80E's also use the "early" style drum and an actual sprag. The stock 16 element sprag is in the center, with the 34 element on the right. | ||
| − | + | The 4L80E direct drum uses a sprag race that is .045 to .050 wider than the T-400 sprag race. If you acquire a 4L80E direct drum be sure to have the correct race too. | |
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| + | [[File:Sprag-drum-compare.jpg|thumb|300px|left|T-400 roller clutch and early design sprag unit]] <br style="clear:both"/> | ||
===Spiro loc retainer=== | ===Spiro loc retainer=== | ||
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