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- From: frankb@hpsad.sad.hp.com (Frank Ball)
- Date: Thu, 5 Nov 1992 18:45:45 GMT
- Subject: Re: Coasting with an automatic
- Message-ID: <3970073@hpsad.sad.hp.com>
- Organization: HP Signal Analysis Division - Rohnert Park, CA
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!saimiri.primate.wisc.edu!zaphod.mps.ohio-state.edu!sdd.hp.com!scd.hp.com!hpscdm!hplextra!hpl-opus!hpnmdla!hpsad!frankb
- Newsgroups: rec.autos.tech
- References: <Bx6Gxv.EM9@uxa.ecn.bgu.edu>
- Lines: 27
-
- In rec.autos.tech, gsu0001@uxa.ecn.bgu.edu (Michael Linden) writes:
-
- * I'm looking for input on possible problems with putting automatic
- * transmissions in neutral to coast up to stop signs and lights. I have
- * heard that this can be bad for an automatic transmission because once
- * disengaged from the engine (neutral), the tranny fluid is no longer
- * pumped through the transmission cooler causing the transmission to run
- * hotter.
-
- If there was no fluid running through the transmission the main problem
- would be destroying the bearings. Most (damn near all) automatic
- transmissions have the oil pump on the input shaft of the transmission.
- As long as the engine is running fluid is being pumped and circulated
- through the transmission. The engine will drop to idle when shifted
- into neutral, so the oil pressure may drop somewhat, but it's probably
- ok because there is no load on the transmission in neutral.
-
- * The reason I am asking is because my Mom likes doing this because she
- * has noticed how much less effort is required by the brakes to stop the
- * car (not fighting the engine at lower speeds).
-
- It is probably illegal, but I won't tell.
-
- Frank Ball 1UR-M frankb@hpsad.sad.hp.com
- Hewlett Packard (707) 794-4168 work, (707) 538-3693 home
- 1212 Valley House Drive (707) 794-3844 fax, IT175, XT350, Seca 750
- Rohnert Park CA 94928-4999 KC6WUG, AMA, Dod #7566, I'm the NRA.
-