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From: marauder@fluke.UUCP (Bill Landsborough)
Newsgroups: net.auto.tech
Subject: Re: 280Z Problems
Message-ID: <3036@vax4.fluke.UUCP>
Date: Mon, 20-Jan-86 14:39:03 EST
Article-I.D.: vax4.3036
Posted: Mon Jan 20 14:39:03 1986
Date-Received: Wed, 22-Jan-86 04:29:29 EST
References: <1604@hound.UUCP>
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Lines: 28

In article <1604@hound.UUCP> malibu@hound.UUCP (K.KRUSINSK) writes:
>
>Here's the deal: My recently purchased 1978 280Z has developed a
>nasty vibration in first or second gear while the car
>is under acceleration (From a stop or near standstill.).
>It also occasionally makes a single loud "thunk" starting
>from a stop.  All this noise originates from the rear
>end (apparently) so I figured the problem is in the
>axle half-shaft U-joints.  I can't isolate the problem, though,
>because I can't identify any bad U-joints by inspection.
>All four are tight, show no free play, and otherwise look fine.

Two things.  Put the car against an immovable object and while you or
a friend tries to drive through the immovable object the other is
looking and listening for the area of noise.  

Another possible "suspect" is loose motormounts which allow your
engine to rotate more than normal under hard acceleration and the
exhaust pipe or manifold is first thumping and then vibrating against
the frame.

Bill Landsborough

----

"Love is patient and kind; love is not jealous or boastful; it is not 
arrogant or rude... Love bears all things, believes all things, hopes all
things, endures all things."   1 Corinthians 13:4-7