Date: Sun, 21 Aug 2022 22:14:03 -0500
Reply-To: John Rodgers <jrodgers113@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Rodgers <jrodgers113@GMAIL.COM>
Subject: Re: A mystery
In-Reply-To: <BL0PR05MB491651D2F5874B2D26DDEC4BA0719@BL0PR05MB4916.namprd05.prod.outlook.com>
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Thanks for the info. I don't know much about these things. I feel I have a
steep learning curve . The man who did the engine conversion told me about
the loose bearings. I went to my transmission rebuilder who has years of
rebuilding experience including various VW vehicles and talked about the
bearings. I mentioned the problem. He immediately identified it as being
associated with those bearings. Don't know what else to say about it. The
van is high mileage, like 242,000, and the tranny has never been cracked
open except for standard servicing. No doubt those bearings are worn.
On Sun, Aug 21, 2022 at 8:53 PM Dennis Haynes <d23haynes57@hotmail.com>
wrote:
> The output axle bearings are not the source of any play. When they go bad
> it is obvious and will usually be accompanied by a destroyed ring and
> pinion set. The axle flanges and stubs are one piece, that slide into the
> center bore of the differential and engage in the splines of the
> differential gears. Some rocking and lateral play is normal. If using
> magnets and a sensor on the CV jpints you can add a 3rd magnet to
> increase the speed feedback to the ECU. Someone can also tune it to allow
> full revs regardless of vehicle speed. You may also want to consider a GPS
> to check speedometer accuracy. Another option for the VSS is to use the
> speedometer pick up for the cruise control.
>
>
>
> Dennis
>
>
>
>
>
> *From:* John Rodgers <jrodgers113@gmail.com>
> *Sent:* Sunday, August 21, 2022 9:13 PM
> *To:* Dennis Haynes <d23haynes57@hotmail.com>
> *Cc:* vanagon@GERRY.VANAGON.COM
> *Subject:* Re: A mystery
>
>
>
> Ok, thanks. BY CARRIER BEARINGS I mean the bearings for the stub/flange
> that sticks out of the transaxle that the CV's mount to. I can get OBD 2
> readouts on my phone. Just haven't done that yet. Tonight perhaps. At 70
> mph the tach reads 4000 rpm. 70 MPH IS THE MAX I will ever drive it. 60 to
> 65 in most places. I'm not in that big of a hurry to go anywhere at my age.
> eVENTUALLY i will install a temp gauge for ATF temp monitoring. As always
> if you own a Vanagon it's an ongoing project.
>
>
>
> On Sun, Aug 21, 2022 at 5:24 PM Dennis Haynes <d23haynes57@hotmail.com>
> wrote:
>
> By what are you referring to as the "carrier Bearings". What are you using
> for the vehicle speed sensor? If possible use the OBD 2 to see what the ECU
> is seeing as the vehicle speed. Since you are running automatic with
> original gearing you need to get the VSS to rear close to what the engine
> would expect at over 4,000 rpm. For that engines original application 70
> mph would be well under 3,000 rpm. For best results you probably need a
> 3.27 RP set and some serious ATF cooling and temperature monitoring.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of John
> Rodgers
> Sent: Sunday, August 21, 2022 4:33 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: A mystery
>
> I have a fairly new Subaru engine conversion in my van. The engine itself
> is basically new by way of an overhaul. It has 800 miles on it now. The
> carrier bearings are a bit worn and they wobble sufficiently at 70 mph as
> to cause the VSS to get erroneous signals which in turn causes the engine
> to jerk like misfire or improper or inadequate fuel mixture. The carrier
> bearing problem will be fixed next week. IF I keep speed below 70 then no
> problem. However in ranges between 55 and 65 the engine will sometimes
> suddenly shut off as if Ihave turned off the ignition. If I keep my foot on
> the gas pedal then the van continues to slow down. If Ilet of the pedal a
> few seconds the engine picks up and continues on its merry way.
>
> Anyone have any idea what could cause this?
>
>
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