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4l60 was named in 92 and switched to 4l60e in 93. 84 and later had the 30 spline input shafts. the switch over to the speed sensor in cars was 84-85. in trucks it was about 87-88 time line.
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04 GMC Sierra RCSS
70 CST LWB
04 HD Sportster 1200 Custom
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