

| Subject: | Re: Strange Auto Trans Behavior |
| From: | Dennis Haynes |
| Date: | Mon, 24 May 2010 23:27:59 -0400 |
The fluid whistling noise tells me that most likely one of the clutch pistons is ripped. I always try to replace them at overhaul time. Many shops do not. I have also had some new one fail. Dennis -----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of BenT Syncro Sent: Monday, May 24, 2010 7:11 AM To: vanagon@GERRY.VANAGON.COM Subject: Re: Strange Auto Trans Behavior Hi Dennis, > Is it a wine or fluid whistle? And to be clear it whines with the > engine > "off" but it still works while whining? I do not understand. It sounds to me like a fluid whistle which gets higher in pitch. Once the noise goes away, drive is gone from all gears 1,2,3&R. There is no noise when the engine is off. Once I restart the engine, I can again but only as long as the noise is present. > The fact that it works when cold and then stops indicates an > internal fluid > leak or valve problem. The typical culprits after a repair are the > accumulator seal, or one of the piston seals, or a broken ring on > the direct > drum. The 2nd gear brake band piston and accumulator can be fixed > tranny in car. The other require removal and disassembly. A > competent tranny man should know how to pressure test and then drop > the valve body and air test all the pistons. The pumps rarely go bad > and when they do it is often the > result of something else including improperly shimming the drum > assemblies when joining the differential. Thank you again for your insight. I had to re-evaluated my situation and decided the tranny swap is the best solution for me. I would have loved to find out exactly what is wrong with the trans/valve body/TQ, etc. However, after reading your advice as well as ny several others, I have come to the conclusion that troubleshooting the trans will require more time and effort than what is available to me. My mechanic/friend had offered to replace the trans essentially for free. His way of saying thank you for giving him a Vanagon some months ago. I don't want to impose on him to do anything beyond what he volunteered to do. Doing it myself is out of the question because I live in one of those neighborhood where major automotive repairs are not permitted. One drop of oil on the driveway gets the local busybody running to the homeowner's association. Yes, I know, I should move. Soon. Regards, BenT
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