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Terry Gleason
Newbie
South Australia
TTjz2e

Posts: 1
Reg: 02-2008

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Wednesday, February 27, 2008 - 09:44 am, by:  Terry Gleason (Terrry55) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

My 90 Soarer has an erratic readout on the speedometer. When I'm doing 60 the speedo bounces from 40 to 60 and all in between. I just use the peak number to tell speed. It also does not read over 90kph. I'm hearing I have a choice of 3 different areas to look at, 2 at transmission and dash.
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 3414
Reg: 10-2005

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Thursday, February 28, 2008 - 06:53 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Only time I've ever had speedo bounce, it was caused by fine metal shavings inside the unit itself. I had it cleaned by a specialist, and all was well. This was on a mechanical unit in a Triumph though, so may not relate at all to your Soarer.
Terry Gleason
Newbie
South Australia
TTjz2e

Posts: 2
Reg: 02-2008

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Saturday, March 15, 2008 - 05:49 pm, by:  Terry Gleason (Terrry55) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Terry Gleason wrote on Wednesday, February 27, 2008 - 09:44 am:


Matthew, Thank you for your reply, what unit was cleaned?
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 3439
Reg: 10-2005

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Monday, March 17, 2008 - 08:44 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It was a Smiths Speedometer out of a Triumph Dolomite Sprint - totally mechanical system where the cable from the transmission goes straight into the back of the speedo. Aparently metal filings caused by wear stick to something inside them and that causes the bounce.
Andrew Ferres
DieHard
WA
'90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8

Posts: 787
Reg: 07-2005

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Monday, March 17, 2008 - 12:03 pm, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

First option Matt would be to change the sensor on the side of the tranny (electronic sensor, not the speedo gear).

Second place to look would be the dash itself.


I'd suggest doing the tranny one first, because even though its dirtier, its easier and quicker.

About 5 mins to change once you can get under the car.
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 3440
Reg: 10-2005

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Tuesday, March 18, 2008 - 06:53 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Andrew Ferres wrote on Monday, March 17, 2008 - 12:03 pm:

First option Matt




Not me, my speedo is working fine - this was a problem I had many years ago on a Triumph - it was fixed by a crowd called Dashboard Restorations. From memory it was pretty cheap.
Andrew Ferres
DieHard
WA
'90 C-F Celsior V8, '84 Soarer V8, '91 Supra V8

Posts: 788
Reg: 07-2005

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Tuesday, March 18, 2008 - 08:27 am, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sorry, was supposed to be 'Terry'

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