Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site harpo.UUCP
Path: utzoo!linus!philabs!cmcl2!seismo!harvard!talcott!panda!genrad!decvax!harpo!mls
From: mls@harpo.UUCP
Newsgroups: net.auto
Subject: 4 Speed GM Auto Transmissions
Message-ID: <2749@harpo.UUCP>
Date: Fri, 2-Aug-85 08:51:23 EDT
Article-I.D.: harpo.2749
Posted: Fri Aug  2 08:51:23 1985
Date-Received: Sun, 4-Aug-85 06:09:51 EDT
Sender: mls@harpo.UUCP
Organization: AT&T Bell Laboratories, Whippany
Lines: 22
Nf-ID: #N::72500017:000:837
Nf-From: !mls    Aug  2 08:51:00 1985

Does anybody had any experience with the 4 speed automatic transmission
used in Buick Park Avenue or Oldsmobile 85 cars.  I now have a second
transmission in the car and at 8000 miles on it, there are problems
in downshifting rom the overdrive to drive speed.  It does not happen
all the time but it can be a very rough shift.  I believe it is down
shifting from 4 to 3 without removing the lockup on the torque converter.
The service manager claims that is the way it is supposed to happen
but the 800 number for Buick claims the torque converter lockup
is supposed to come off before the downshift.

I have the service manual at home, but it is a package a foot thick.
I guess I will finally have to break down and fine the right section.
Any comments will be appreciated.

Irv McNair
ATT Bell Labs,  Whippany
8-232-4162
9-386-4162
.