700r4 4th gera servo problems - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-21-2007, 12:21 PM
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700r4 4th gera servo problems

Here we go again, I had a 700r4 tranny rebuilt and drove it for about 500 or so miles before loosing 4th gear (essentially what I had left was a very expensive 3 speed). What I found out was that the 4th gear servo's (located on the passenger side case and easy to get at) teflon seal had rolled over the edge of the servo. I replaced same and it worked for about 300 miles before loosing 4th again. I removed the servo and found the same problem, the teflon seal had rolled over the edge of the servo. Can anybody tell me what the heck the problem is...is the servo travellng to far, is the servo cover to short (I didn't think there was a difference from one to another). Its really starting to take the fun out of hot rodding!!!!!

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Old 06-24-2007, 04:36 PM
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place a thin washer on the band pin before you put the servo on sounds like the piston may be traveling to far
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