MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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donfaber
Don Faber
Terra Alta WV
(111 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Transmission fluid at speedometer
Posted by: donfaber
Date: August 25, 2012 06:47PM

I have a 79 B with 3.9L V8, T5 camaro tranny, 23 tooth speedo adapter gear and original MGB speedometer cable and speedometer. I now have tranny fluid at the speedometer, leaking on my pants! Anyone know what seal I need to replace, where I get it? Thanks.


flitner
John Fenner
Miami Fl
(168 posts)

Registered:
03/11/2010 10:58AM

Main British Car:
1972 MGB 350 CHEVY

Re: Transmission fluid at speedometer
Posted by: flitner
Date: August 27, 2012 02:34PM

Ant trans shop should have what you need.


donfaber
Don Faber
Terra Alta WV
(111 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Transmission fluid at speedometer
Posted by: donfaber
Date: August 27, 2012 03:04PM

Have contacted one - thanks!
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DiDueColpi
Fred Key
West coast - Canada
(1366 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

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Re: Transmission fluid at speedometer
Posted by: DiDueColpi
Date: October 03, 2012 01:42AM

Hey Don,
Just a couple of things to check before you change the seal(s).
Is the trans vent working and clear? Pressure built up when the oil heats up can push it out everywhere.
Do the spirals on the speedo gear shaft and on the speedo cable rotate in the right direction? If they are turning backwards they make an incredibly effective pump that will overpower any seal ( just ask Suzuki and Volkswagen). I've seen speedos that look like aquariums on more than one occasion.
Cheers
Fred


donfaber
Don Faber
Terra Alta WV
(111 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Transmission fluid at speedometer
Posted by: donfaber
Date: October 03, 2012 09:12AM

Thanks, Fred - changed speedometer driven gear and housing ( with 2 new seals) - all is well now.
Don


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