[TR] TR6 tranny sound?

[wbeech at flash.net]

With it on stands, unladen, it could be that the routing is changed just
enough to eliminate the sound.  Disconnect it and give her a run up the
road.
B 

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Tim Gaines
Sent: Wednesday, May 16, 2012 8:08 AM
To: Triumphs at autox.team.net
Subject: Re: [TR] TR6 tranny sound?

I've had a few suggestions that I've ruled out such as wire wheel splines
and loose wheel lugs, and a few other ideas that I'll check out, but I don't
think I've gotten the answer to the noises yet.  I'm now wondering if the
speedometer cable could be responsible for the "zzzup" sounds I am hearing.
It seems likely that it would make noises at takeoff but then quiet down (or
maybe just get high pitched and less noticeable).  But I'm not sure why I
wouldn't hear anything with the car up on jackstands and the wheels under
power.

Tim


At 06:00 PM 5/15/2012, you wrote:
>I thought I was leaving for a nice drive of about 150 miles in the
>TR6 a few days ago, but I didn't get farther than the gas station 
>before some nasty noises turned me right around.  When taking off from 
>a stop I get a crunching sound plus a "zzzup" thrown in once in a 
>while.  My first thought was that I had a stone or two from my newly 
>graveled driveway sitting on top of the drive shaft.  But I also 
>thought it could be the tranny or the differential, and I didn't want 
>to take any chances out on the road.  I got home okay.  In fact, the 
>car ran smoothly once up to speed.  It only made the sounds at takeoff.  
>I got it up on jackstands and couldn't find any evidence of stones or 
>loose flange bolts at either end of the drive shaft or at the rear 
>axles.  I also couldn't reproduce the sounds with the wheels off the 
>ground, either with the rear  wheels under power or by turning the 
>front ones by hand.  I also couldn't feel or hear anything when I 
>turned the rear wheels by hand or the drive shaft with a wrench on the 
>flange bolts.
>
>When I got the car on the ground and found that it still made the 
>sounds (no lucky fix!), I started thinking it might be a disc brake pad 
>issue.  It seemed like the sounds were coming from the front.  Today I 
>replaced the pads and the nasty looking anti squeal shims.  In the 
>process I rotated the rotors with and without pads in place and got no 
>noises.  However, I did get something like the "zzzup" noise when I 
>deflected the rotor guard into the rotor while turning it.  After 
>everything was back together I made sure that the guard wasn't touching 
>the rotor before getting the car back on the ground.  Just took a drive 
>up the road, and nothing has changed; crunchy noises and "zzzups" at 
>takeoff, forward and backward, but fine after it's up to speed.  I 
>think I can feel a little something through the shifter when the noises 
>occur, but I'm not really positive about that.  I also think that the 
>noises stop when I disengage the clutch, but by the time I reach speed 
>enough for that, the noises are usually gone anyway.
>
>So folks, what am I up against?  Does a transmission make those kinds 
>of noises when it's failing?  Is there something else I should be 
>looking at?  Thanks for any help you can offer.
>
>Tim
>1974 TR6
>1980 Spitfire
>
>** triumphs at autox.team.net **
>
>Donate: http://www.team.net/donate.html
>Archive: http://www.team.net/archive
>Forums: http://www.team.net/forums
>Unsubscribe/Manage: 
>http://autox.team.net/mailman/options/triumphs/mtgaines@mail.presby.edu

** triumphs at autox.team.net **

Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe/Manage:
http://autox.team.net/mailman/options/triumphs/wbeech@flash.net