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Old 09-02-2014, 12:33 AM   #1 (permalink)
Cyborg ECU
 
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,238

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Putting a Metro transmission back together

How I spent 12 hours on a Saturday with a 1993 Metro transmission and a friend...

The exposed gears in the main case:


Inspecting synchros:


That odd fifth gear spot (gears not yet in place) outside the main case:


Aha! It's not in neutral:


That was the first time I have worked with an opened-up transmission. Very useful for developing greater familiarity with them for my own transmission rebuild sometime, maybe next year (I hope).

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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MetroMPG (09-02-2014)
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Old 09-02-2014, 08:38 AM   #2 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
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So is it all back together? This was for the final drive swap?

I don't think the external 5th is that unusual (for cars of that vintage, anyway -- can't speak for more modern ones).
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Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown



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www.MetroMPG.com - fuel efficiency info for Geo Metro owners
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Old 09-02-2014, 08:55 AM   #3 (permalink)
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The first Z car 5 speeds had the 5th gear behind the center plate and the main case. Reverse gears were behind that. 4th gear just locked the imput shaft to the main shaft and it was direct drive. The counter shaft did not even need to be in the case for 4th to work. My doctors D21 pickup sheared the key off the front counter shaft gear to the input shaft. He made it to the shop using only 4th gear.

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Mech
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Old 09-02-2014, 12:48 PM   #4 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,238

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,356
Thanked 2,129 Times in 1,444 Posts
Quote:
Originally Posted by MetroMPG View Post
So is it all back together? This was for the final drive swap?

I don't think the external 5th is that unusual (for cars of that vintage, anyway -- can't speak for more modern ones).
It is all back together and when I left we had finished replacing the flywheel and clutch and had reinstalled the transmission itself on the engine. He opted not to mod the transmission though, and just do some worn part replacements, mainly gaskets... oh and he needed to get a whole cork he had dropped into it while trying to seal the trans against moisture intrusion!

Last time I was out there I suggested the swap, since it was off, but he didn't want the expense and fretted about climbing hills. "Just shift down" was not a convincing response.

Was a good time though, and another Metro transmission has been put back on the road...
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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Old 09-02-2014, 02:45 PM   #5 (permalink)
Batman Junior
 
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,193

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)
Thanks: 3,776
Thanked 6,602 Times in 3,426 Posts
I bet that transmission would have fared just fine with that small meal of cork. Probably good for it!
__________________
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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Old 09-02-2014, 08:15 PM   #6 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,238

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,356
Thanked 2,129 Times in 1,444 Posts
Quote:
Originally Posted by MetroMPG View Post
I bet that transmission would have fared just fine with that small meal of cork. Probably good for it!
Yeah, that's probably right. It was fun, though, and we got to inspect stuff. We were laughing pretty hard as we struggled to get the transmission back onto the block. At least it wasn't the tranny from his giant diesel pickup!

__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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