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

Fri Jun 5 16:20:28 PDT 2015

We have a scanguage on Ryans F250 diesel. In addition to the Trans temp, boost and exhaust gas temp gauges on the windshield column

Bob

Sent from my iPhone

> On Jun 5, 2015, at 4:02 PM, Thomas Mehrkam <tmehrkam at sbcglobal.net> wrote:
> 
> 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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