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Date:         Thu, 12 May 2016 07:24:46 -0400
Reply-To:     Larry Alofs <lalofs@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@GMAIL.COM>
Subject:      Re: Autotranny
In-Reply-To:  <000c01d1abf0$7b83c8f0$728b5ad0$@gmail.com>
Content-Type: text/plain; charset=UTF-8

I have had Seafoam AT treatment work very well in one case and also had a couple of cases where it didn't help much. Worth a try.

Larry A.

On Wed, May 11, 2016 at 9:49 PM, Jeff Schwaia <vw.doka@gmail.com> wrote:

> It most definitely can! I have a friend you popped a cooling hose on his > '88 and decided that it was only a mile to home... > > When I checked out his van, it still ran... kinda, but the auto > transmission was fried! The squeal it made was unlike anything I've ever > heard from an AT. My tranny guy said it was one of the worst looking > automatics he's ever taken apart. Pretty much un-rebuildable. Had to buy > a core transmission for him to rebuild. > > Cheers, > > Jeff > > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of Dennis Haynes > Sent: Wednesday, May 11, 2016 6:00 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Autotranny > > Did it ever work properly after the engine was replaced? Yes it is > possible that an overheated engine can transfer enough heat to the ATF > cooler to damage it. The automatic transmission consists of a bunch of > hydraulically applied clutches. Not only is hydraulic pressure used to > apply the clutches but the valve body also uses fluid pressure to make > decisions. Any failed seal or stuck/clogged valve can prevent the works > from working! A knowledgeable tranny guy will know who to diagnose one of > these units. To isolate a valve body problem from a clutch-piston problem. > The valve body can be removed and compressed air can be used in the ports > to test the pistons for reverse, forward, direct, and the 2nd gear brake > band. The 2nd gear brake band piston can be serviced with the trans in > place. Anything else means removal and a teardown. If those test good then > you can work with the valve body and the governor. Also it is possible for > the direct clutch pack to be burned out. The trans could be shifting but > that pack is slipping so bad you don t get the gear change. > > > Dennis > > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf > Of John Rodgers > Sent: Wednesday, May 11, 2016 6:03 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Autotranny > > This tranny worked fine when it was parked for the engine change at 118, > 000 miles. The valve body had been cleaned and reinstalled with a new > filter. It ran well before the engine change. A year later ( due to > complications with the engine) it doesn't work. Currently ATF level is to > the mark, and fluid is new! This one has me and my mechanic stumped! > > John > On May 11, 2016 16:09, "Scott" <SCOTTDANIEL@turbovans.com> wrote: > > > If it worked fine before the 12 months of sitting, I would say the > > sitting caused the problem. Seals getting dry and hard and not > > sealing. I would warm it up and drive it around gently at low speed > with the shifter in "2" > > to get the tranny up to temperature and then see if it starts to > > engage 3rd. You may also want to try one of those fluid additives. > > > > Does it work fine other than not shifting into 3rd? > > > > I don't think the engine overheating would cause tranny issues. > > > > Edward > > > > On Wed, May 11, 2016 at 11:32 AM, John Rodgers <jrodgers113@gmail.com> > > wrote: > > > >> What would be some causes for the autotranny not to shift into 3rd gear. > >> It > >> worked fine before but has been sitting for 12 months! > >> > >> John > >> > > > > >


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