[AT] Getting water out of a gearbox/now bearing life

deanvp deanvp at att.net
Fri Jun 5 13:15:54 PDT 2015


    
I to use the Scan Gauge to monitor transmission temperature hauling a 38' 5th wheel up long grades.   Lots of other information also available.  However sometimes I wonder if it is information overload! :-)



Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Thomas Mehrkam <tmehrkam at sbcglobal.net> 
Date: 06/05/2015  1:02 PM  (GMT-08:00) 
To: Antique tractor email discussion group <at at lists.antique-tractor.com> 
Subject: Re: [AT] Getting water out of a gearbox/now bearing life 

To me transmission temp is very important.  I haul very heavy loads up long steep grades.
A way or monitoring Transmission temp is the first thing I solved.  I use ScanGage an OBDII connected device that will display the transmission fluid temp using the embedded temperature sensor embedded in the transmission.
Works quite well and gives a wealth of other information also.
www.scangauge.com
 


     On Friday, June 5, 2015 2:52 PM, charlie hill <charliehill at embarqmail.com> wrote:
   

 Mike, sure I can do that.  What I had in mind is something that will alert 
you to
a problem when you are hurtling down the highway at 80 mph for an entire
fuel tanks worth of miles.  They put low air pressure indicators on new 
vehicles.
I guess they didn't think getting out and looking at the tire was good 
enough
so why not over heat indicators on driveline parts?

By the way I have an IR thermometer in my truck but I didn't need it to know
that hub was hot when I got out to check it.  I can feel the problem in the
way the truck handles and behaves and I knew what the problem was before
I got stopped to check it but our mothers and wives and most men aren't that
mechanically minded.

Charlie

-----Original Message----- 
From: rlgoss at twc.com
Sent: Friday, June 05, 2015 1:42 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Getting water out of a gearbox/now bearing life

You mean I'm actually supposed to use that remote IR thermometer for 
something besides exhaust temperature on small engines? Thanks for the 
reminder, Mike, I'll carry it along while trailering to tractor shows.  It's 
ready-made for checking tire, bearing, and other temperatures on long trips.


Larry
---- Mike <meulenms at gmx.com> wrote:
> Charlie, you could actually do that yourself with an inexpensive IR
> thermometer. Now that you have a new one, after a bit of a drive, check
> the temp by the zero speed sensor. If the old one is noticeably higher,
> time to change it.
>
> Mike M
>
>
> On 6/5/2015 12:04 PM, charlie hill wrote:
> > True enough I guess Steve.  Also the folks at GM have no interest in me
> > keeping my truck for 20 years and putting 500,000 miles on it.
> > Statistically, folks like me are way beyond an anomaly.  Still it would 
> > be
> > nice and at 10 times 2 bucks or even 100 times 2 bucks it would be an
> > interesting gadget to have. It would not have to read the actual bearing
> > race temperature.  All it would need to do is read the extremes at the
> > location of the zero speed sensor and report an out of range event that
> > would reset if it was short term.
> >
> > Charlie
> >
> > -----Original Message-----
> > From: Stephen Offiler
> > Sent: Friday, June 05, 2015 9:18 AM
> > To: Antique tractor email discussion group
> > Subject: Re: [AT] Getting water out of a gearbox/now bearing life
> >
> > On Fri, Jun 5, 2015 at 7:30 AM, charlie hill 
> > <charliehill at embarqmail.com>
> > wrote:
> >
> >> You know, it just occurred to me regarding what I wrote below,
> >> That hub assembly already has a zero speed sensor built into
> >> it.  Surely it would not have been too hard for GM's engineers to
> >> put a high temperature alarm in there two.  I guess it would have
> >> cost them a dollar or two.  With the price of a new truck comparable
> >> to my '06 now being in excess of $50,000 you would think they could
> >> afford to throw it in though.  Then again maybe the 2015's have that
> >> feature?
> >>
> >> Charlie
> >>
> >>
> > Nobody offers this feature as far as I know, and I'll acknowledge it is 
> > a
> > REALLY interesting idea, but the devil is in the details.
> >
> > The system cost (temperature detection device, its mounting and sealing
> > within the bearing assembly, plus the wiring, plus the hardware 
> > components
> > and some software to interpret the signal inside a computer somewhere) 
> > is
> > potentially quite a bit greater than the $1-2 you suggest.  Ten times 
> > that
> > figure would not surprise me even a little bit.
> >
> > But I think the real issue is statistics.  Somebody at GM, I can 
> > *assure*
> > you this is a fact, has done a Design Failure Modes and Effects Analysis
> > (DFMEA) on those bearings as well as every single other piece of the
> > truck.  They consider the likelihood of failure within a certain mileage 
> > or
> > timeframe (often 150,000 miles)  and they consider the negative effects 
> > of
> > a failure.  They rank every single component and system on the entire 
> > truck
> > and put the vast majority of time and effort into knocking down the most
> > likely failures with the most severe consequences.  I've worked for a 
> > major
> > automotive supplier in the past, and part of my job was creating and
> > maintaining DFMEA documents for the components we manufactured, so I 
> > know
> > exactly what I am talking about here.
> >
> > In short, I am certain that those hubs/bearings have been the subject of 
> > a
> > DFMEA and they fell way back behind many other possible failure points 
> > and
> > got lost.  So no money, zero point zero dollars, allocated for your
> > temperature sensors.
> >
> > SO
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