PT36 retarder & other things

[Bob Lawrence]

I have a Jake on my 6v92. When we are coming to the Hoodsport Wa.
rally last year, came down off the hills and put on the Jake.
The guys in camp said "Here comes Bob"..seems I'm the only one with a
Jake, others have the retarder.
Bob Lawrence
84 PT36
Tacky Tacoma, Wa.

> Yeah, but a Jake on a 892, whata beautiful noise.
> MH
> ----- Original Message -----
> From: Leroy Eckert
> To: WanderlodgeForum@yahoogroups.com
> Sent: Thursday, August 23, 2007 4:25 PM
> Subject: Re: [WanderlodgeForum] Re: PT36 retarder & other things
>
>
> Howard, you sure can. I have two verbal bids for a Jake Brake
addition on my 8v92 DDEC II. $9,500 and $9,000. Non -DDEC systems may
be slightly cheaper, around $6-8,000. I did not want to buy a new
bus, I just wanted a Jake brake. lol
> Leroy Eckert
> 1990 WB-40"Smoke N Mirrors"
> Niceville, FL
> ----- Original Message -----
> From: Howard O. Truitt
> To: WanderlodgeForum@yahoogroups.com
> Sent: Thursday, August 23, 2007 5:10 PM
> Subject: Re: [WanderlodgeForum] Re: PT36 retarder & other things
>
> Shane,
> Could you add a jacob brake and have both a retarder and a jake
brake.
> Howard T., Sowega, 86 PT40
>
> ----- Original Message -----
> From: sfedeli3
> To: WanderlodgeForum@yahoogroups.com
> Sent: Thursday, August 23, 2007 11:31 AM
> Subject: [WanderlodgeForum] Re: PT36 retarder & other things
>
> Hi All,
>
> My tranny reading is regularly 230 degrees. Of course, it could be
> a faulty sending unit, but my engine oil temp is around the same
too,
> if not a little warmer. I would expect both oil sumps to be pretty
> close in temperature and seem to recall the blue book indicating
that
> 200 to 250 was the normal operating temp for the Allison that I
have.
> In any event, I change the fluid annually. It's relatively cheap
and
> easy to do on the mid-80's PT models. You just need a BIG bucket.
> Varying brands of tranny fluid have different flash points and
> additives. I've been using Lubrication Engineers
> [http://www.le-inc.com] 7500 MONOLEC® Power Fluid in numerous
vehicles
> for a number of years with great results and never smell burned
fluid
> when I drain. If you're really concerned about the tranny temps,
or
> drive the western Rockies, get a Jacobs Engine Retarder.
>
> Shane Fedeli
> 85PT40
> Hershey, PA
>
> --- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
> wrote:
> >
> > I found this on another website:
> >
> > Why Atf Wears Out
> > An automatic transmission creates a lot of internal heat through
> friction: the friction of the
> > fluid churning inside the torque converter, friction created
when
> the clutch plates engage,
> > and the normal friction created by gears and bearings carrying
their
> loads.
> >
> > It doesn't take long for the automatic transmission fluid (ATF)
to
> heat up once the vehicle
> > is in motion. Normal driving will raise fluid temperatures to
175
> degrees F., which is the
> > usual temperature range at which most fluids are designed to
> operate. If fluid
> > temperatures can be held to 175 degrees F., ATF will last almost
> indefinitely -- say up to
> > 100,000 miles. But if the fluid temperature goes much higher,
the
> life of the fluid begins
> > to plummet. The problem is even normal driving can push fluid
> temperatures well beyond
> > safe limits. And once that happens, the trouble begins.
> >
> > At elevated operating temperatures, ATF oxidizes, turns brown
and
> takes on a smell like
> > burnt toast. As heat destroys the fluid's lubricating qualities
and
> friction characteristics,
> > varnish begins to form on internal parts (such as the valve
body)
> which interferes with the
> > operation of the transmission. If the temperature gets above 250
> degrees F., rubber seals
> > begin to harden, which leads to leaks and pressure losses. At
higher
> temperatures the
> > transmission begins to slip, which only aggravates overheating
even
> more. Eventually the
> > clutches burn out and the transmission calls it quits. The only
way
> to repair the damage
> > now is with an overhaul -- a job which can easily run upwards of
> $1500 on a late model
> > front-wheel drive car or minivan.
> >
> > As a rule of thumb, every 20 degree increase in operating
> temperature above 175 degrees
> > F. cuts the life of the fluid in half!
> >
> > At 195 degrees F., for instance, fluid life is reduced to 50,000
> miles. At 220 degrees,
> > which is commonly encountered in many transmissions, the fluid
is
> only good for about
> > 25,000 miles. At 240 degrees F., the fluid won't go much over
10,000
> miles. Add another
> > 20 degrees, and life expectancy drops to 5,000 miles. Go to 295
or
> 300 degrees F., and
> > 1,000 to 1,500 miles is about all you'll get before the
transmission
> burns up.
> >
> >
> > Kerry
> > 82 FC 35
> > Denver
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
>
> > wrote:
> > >
> > > Those temperatures seem really high to me. I was looking at
hose
> temperature ratings
> > > and fluid temperature ratings when I was redoing my power
> steering. My recollection is
> > > that standard hydraulic hose was rated to 250 degrees and the
> expensive high
> > > temperature hose was rated to 325 or 350. I think regular
> transmission fluid was rated
> > as
> > > functional up to about 250 degrees and synthetics up to about
350.
> These numbers are
> > > from my memory, If anyone else has knowledge about the
functional
> temperatures of
> > > transmission fluid, I'd like to know. I'd be quite concerned
with
> temperatures over 300
> > > degrees.
> > >
> > > Kerry
> > > 82 FC 35
> > > Denver
> > >
> > > be sure to keep it below
> > > > 320-330 degrees or you'll shorten the life of the tranny
fluid
> > > > greatly. Most commercial bus drivers have to change the
tranny fluid
> > > > every 50K miles when using the tranny retarder often. Mine
> easily goes
> > > > from 230 to 300 degrees when descending a steep off-ramp.
One way to
> > > > slow the heat is to engage the fan override and let the
hydro
> fan rob
> > > > 25-30 horses from the engine and cool the tranny fluid a
little
> > > > quicker. On an off-ramp it does not make much difference,
but on
> the 3
> > > > or 4 mile grade, you can usually make it to the bottom
under 320
> > > > degrees if you also use the service brakes along with the
tranny
> brake
> > > > and fan to slow the coach down.
> > > > Shane Fedeli
> > > > 85PT40
> > > > Hershey, PA
> > > >
> > > >
> > >
> >
>
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