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PostPosted: Sat Mar 10, 2012 1:37 pm 
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Joined: Sat Mar 10, 2012 1:27 pm
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Location: Lake Placid, NY
I have a automatic trans out of a 1991 metro with the torque converter. I will be making a special mounting plate to mount an engine other than a metro 3 cyl on it for a special vehicle project. This machine will use the transmission and only the trnasmission out of this geo... no engine or computer.


My question is will the transmission (complete with hoses and cooler (radiator) work as it would in the car given the computer that controlls the engine is not hooked up to it? In other words will the trans run/shift normaly with another engine in a different vehicle or does it need the CPU / brain/ computer out of the 1991 Geo? Thanks in advance.


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PostPosted: Sat Mar 10, 2012 1:43 pm 
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Location: Palm Springs: Too hot from June to Oct.!
Does it have a wiring harness coming out of it for electric shift solenoids?
A Powerglide 2 speed transmission would work properly if you want a simple set up.
You'd just have to hook up one vacuum line and if you want it to downshift, some downshift linkage.

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Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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PostPosted: Sun Mar 11, 2012 4:07 pm 
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Joined: Sat Feb 25, 2012 4:10 pm
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Location: Michigan
If I'm not mistaken, these automatic transmissions are controlled by their own "electronic brain" that communicates with the engine ECM. I believe this transmission controller (which is located under the dash to the right of the instrument cluster) tells the tranny when to shift.


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PostPosted: Sun Mar 11, 2012 5:34 pm 
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Location: Palm Springs: Too hot from June to Oct.!
hobsickle wrote:
If I'm not mistaken, these automatic transmissions are controlled by their own "electronic brain" that communicates with the engine ECM. I believe this transmission controller (which is located under the dash to the right of the instrument cluster) tells the tranny when to shift.

Welcome to Teamswift, hobsickle. Cool name.
There's a famous High School Biology Teacher by that name in Michigan!

Gotta have this:
Image
along with a lot of other inputs for it to shift correctly in Lake Placid.


Like hobsickle said, the answer to your question is 'no' if you have the transmission with the wires coming out of it and the two electric shift solenoids inside next to the throttle body. What does your automatic transmission look like?

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DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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PostPosted: Fri Mar 16, 2012 9:41 pm 
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Location: Palm Springs: Too hot from June to Oct.!
In the spirit of
"It is a bigger man who will admit when he is wrong..."
or
"Time to eat some Humble Pie"
...the picture I posted above is the ECM (not the TCM) up to the left of the instrument cluster.

If you want to find the TCM in an '89 on, you'll be looking to the right of the steering column:
Image
(this is a '93 convertible, for example)

You'll need both, plus the instrument cluster and wiring to get it to shift right, along with the sensors, IIRC.

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DIY Broken Bolt Removal: viewtopic.php?f=22&t=41042
DIY Clutch Adjustment: viewtopic.php?f=9&t=48281
DIY Wheel Bearings: viewtopic.php?f=2&t=29003
DIY Shocks: viewtopic.php?f=10&t=45483
DIY Wheel Align: viewtopic.php?f=2&t=42479
Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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PostPosted: Sat Mar 24, 2012 10:27 pm 
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Joined: Tue Oct 03, 2006 10:43 pm
Posts: 720
Location: Texas 75150
There is a 2 wire harness that comes off the back of the transmission.(they use the transmission for the ground) This is for your 1-2, and 2-3 shift solenoids. All you need is switchable power(+12 volts) to each wire to get your trans to shift. Make sure you have a ground strap to your transmission or the circuit will try and ground out through your CV joints and will destroy the CV joints and the final drive bearings in about 10,000 miles.

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Fainya
97 Geo Metro LSI,1.3L-GT-DOHC-16v,4.10 5-speed,A/C,170,000,suspension lowered 1",4 wheel disk brakes,15"alloy wheels with 185/50-15 Toyo's,GT bucket seats,analog oil pressure gauge,cruise control, new paint job. 40 mpg at 65 mph.
Good, fast, cheap. You only get two.


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