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Date:         Mon, 29 Jun 1998 16:46:04 -0600
Reply-To:     Fred Porter <fporter@EYRING.COM>
Sender:       Vanagon Mailing List <Vanagon@vanagon.com>
From:         Fred Porter <fporter@EYRING.COM>
Organization: EYRING, Corp.
Subject:      Re: loud trans clanging in reverse and first
Comments: To: vanagon@vanagon.com
Comments: cc: raven@HALCYON.COM
Content-Type: text/plain; charset=us-ascii

Ok, i could buy into that, since the engine is probably the source of the bucking and it does occur at lowish RPMs. But how would that be caused by an extended drive in warm weather?? Today, after cooling off overnight and then being driven its normal commute to the slave pit, it is ok. But man, after a long drive i'm afraid i'm going to wake my neighbors (not to mention turn red with embarrasment). Same shift/clutch/gaspedal technique as any other time, but it is s u p e r bad/worriesome. thanks, fred

Mark McCulley wrote: > > Fred, > I think the problem lies not in your tranny but somewhere in the engine. For > some reason, the engine is lurching when put under load at low rpm. Most > likely related to the FI system somehow. Just might be the throttle switch. > > My theory is that any lurching at the engine will produce the clanging in > the drivetrain. I know this happens on my 87 syncro. When you move the drive > shaft by hand, you can hear the clanging faintly. The harder the lurch, the > louder the clang. This symptom got worse recently when I was having problems > with a misadjusted throttle switch. Now that the switch is working > correctly, there's no more lurching and clanging. > > Mark McCulley > 87 syncro > > At 10:24 AM 6/29/98 -0600, Fred Porter wrote: > >sorry about this, but my syncros clanging/lurching occurs most > >noticeably when using reverse after a long highway drive, but is also > >present in first gear when pulling out. If i rev the engine more than > >normal, i can reduce the lurching/clanging but it doesn't fully go away > >until the vehicle has cooled overnight. > > > >vanagon syncro 180,000+miles total on vehicle > >transaxle and clutch replaced about 55,000mi ago > >redline MTL in transaxle and differential (replaced about 7500mi ago) > >tires yokohama Y370LT (same tire size front and rear) 47 psi front, 50 > >psi rear (6000miles old). > >Problem occurs after extended highway drives in warm temperatures (not > >present in winter) and has only become evident this late spring/summer > >of 1998. > > > >thanks, > >fred > >X-POP3-Rcpt: fporter@lanai > >Return-Path: owner-vanagon@VANAGON.COM > >Received: from gerry.vanagon.com (gerry.vanagon.com [209.0.14.75]) by > lanai.eyring.com (8.8.7/8.6.9) with ESMTP id IAA10680 for > <fporter@EYRING.COM>; Mon, 29 Jun 1998 08:14:33 -0600 > >Received: from gerry (209.0.14.75) by gerry.vanagon.com (LSMTP Lite for > Windows NT v1.1a) with SMTP id <0.812ACFF0@gerry.vanagon.com>; Mon, 29 Jun > 1998 8:18:32 -0700 > >Received: from GERRY.VANAGON.COM by GERRY.VANAGON.COM (LISTSERV-TCP/IP release > > 1.8c) with spool id 33836 for Vanagon@GERRY.VANAGON.COM; Mon, 29 Jun > > 1998 08:18:31 -0700 > >Received: from lanai.eyring.com by gerry.vanagon.com (LSMTP Lite for Windows NT > > v1.1a) with SMTP id <0.7FEDBC10@gerry.vanagon.com>; Mon, 29 Jun 1998 > > 8:18:30 -0700 > >Received: from fporter.eyring.com (ip71.eyring.com [192.77.10.71]) by > > lanai.eyring.com (8.8.7/8.6.9) with SMTP id IAA10665 for > > <vanagon@vanagon.com>; Mon, 29 Jun 1998 08:06:25 -0600 > >X-Mailer: Mozilla 3.03 (Win95; I) > >MIME-Version: 1.0 > >Content-Type: text/plain; charset=us-ascii > >Content-Transfer-Encoding: 7bit > >Message-ID: <3597B13F.6E6A@eyring.com> > >Date: Mon, 29 Jun 1998 09:22:39 -0600 > >Reply-To: Fred Porter <fporter@EYRING.COM> > >Sender: Vanagon Mailing List <Vanagon@VANAGON.COM> > >From: Fred Porter <fporter@EYRING.COM> > >Organization: EYRING, Corp. > >Subject: loud transmission clanging in reverse????? > >Comments: To: vanagon@vanagon.com > >To: Vanagon@VANAGON.COM > > > >hey all you tranny gurus: > > > >after the last couple of road trips ive been on, my trans behaves oddly: > >I will have been driving at highway speeds for hours, only going > >forwards and only slowing for hills or stopping for gas. then when i > >put it in reverse, the van bucks/lurches while i am trying to back up > >and the transmission is ringing/clanging loudly in harmony with the > >lurches. (this happened last night, again, at the end of a 9 hour > >interstate drive). It seems that after the engine/trans totally cool > >down it operates ok: this morning it drives just fine, forwards and > >reverse. > > > >the syncro 4wd 5spd trans and clutch have approximately 55,000mi on them > >and i am running Redline MTL (75w-90) > > > >does anyone know what this problem is??? > > > >thanks, > >fred > > > >


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