Rob;
Yep heat kills Transmissions.
Just about 90% of the heat that is generated in a auto trans. is from the
converter.
This is another reason that a lock up converter helps the trany live, when ever
the converter is locked up the converter isn't multiplying torque and isn't making
any heat.
In the GM late model trans. (700r4 and 2004r ) when the converter is in lock up
mode the fluid is not directed into the converter ( only fluid to engage the
clutch ),
For this reason when some one unplugs the connector for the clutch , the computer
thinks that it is locked up and diverts the fluid flow, but it isn't in lock up
and is still multiplying torque and cooking the fluid that is in it , the next
thing you know , burnt up trans.
FWIW
Colin H.
Rob Agnew wrote:
> ------------------------------
>
> >Date: Fri, 07 Aug 1998 00:41:49 -0400
> >From: Vincent Heckathorn <victorylane@iwaynet.net>
> Subject: Re: DML: O/D Lockout
>
> >I guess you hit it on the head, I really don't think there is a big problem
> >with the OD. My 96 ram was run very hard and pulled a lot heavy trailers with
> >out any problems at all. But if you do have a problem it is going to be the
> >planets.
> >Colin
>
> Colin:
>
> I think so. One gent, who contacted me privately, has a heavy 5th wheel,
> researched it via the RV crowd. It seems the only people who have trouble
> with their OD are those who tow without an auxilary trans cooler (and
> presumable no HD cooling). My dealership, who sells lots of trucks for
> RV's and to industry (logging, mining etc.) has never had a late model back
> with an OD failure.
>
> I've got the tow package and HD everything I could buy at the time. Since
> I'm towing light (2000 lb), I don't really expect any problems, but I do
> kick out the OD when climbing in the mountains and as an engine brake when
> descending. That is what CC recommends in the owner's manual to prevent
> heat buildup and excessive shifting.
>
> Rob Agnew
> ragnew@islandnet.com
>
> Victoria, B.C.
> Canada
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