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Old 03-22-2009, 02:14 AM   #1
jbristo67
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My TH350

My turbo 350 that I picked up today has a plug on it like a 700r4. What is it and how do I make it work on my 67
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Old 03-22-2009, 05:24 AM   #2
JimKshortstep4x4
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Re: My TH350

Depending on the year of the transmission the "plug" could be part of the TCS systems that were put onto vehicles. If it is then the transmission "plug" was for signaling the TCS system when the transmission was in high gear.

I am not sure what other function a "plug" would have on a TH 350.

Jim
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Old 03-22-2009, 10:18 AM   #3
Longhorn Man
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Re: My TH350

the TCS plugged in by the cooler lines.

Does the TH350C have the plug he is describing?
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Old 03-22-2009, 05:34 PM   #4
jbristo67
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Re: My TH350

Quote:
Originally Posted by Longhorn Man View Post
the TCS plugged in by the cooler lines.

Does the TH350C have the plug he is describing?
Its on the opposite side of the coolant lines. It is out of an 81 GMC pickup
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1967 SWB C10 396/400 factory air
factory tach (sadly had to send to a new home)

1986 Honda 70 Fourtrax

1991 Chevrolet K5 blazer 2wd

1982 Mastercraft Pro Star 190 Stars and Stripes

2002 Chevrolet Tahoe

2011 Nissan Armada

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Old 03-22-2009, 10:19 AM   #5
clay68c10
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Re: My TH350

I think the lockup 350C has that plug. It engages the torque converter clutch.
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Old 03-22-2009, 01:14 PM   #6
jbristo67
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Re: My TH350

SO what do I need to make it work????
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1986 Honda 70 Fourtrax

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Old 03-22-2009, 01:46 PM   #7
Boog
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Re: My TH350

I have one too. From what I can find we will need the plug in, vacumn/electric solenoid on the firewall and a cancel switch on the brake pedal and a fused power lead of course. I checked with a local trans man and he said I could not use this trans with a regular converter without making some change inside and could not run it without the converter switch hooked up or it would burn it up. I'm lookin to rebuild my plain t350 instead.
Bill, Palf 70 step, has one of the 350C trannys in his though I don't know if he has driven it or has the converter hooked up.
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Old 03-23-2009, 01:33 AM   #8
jbristo67
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Re: My TH350

What if I just Dont hook it up
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1986 Honda 70 Fourtrax

1991 Chevrolet K5 blazer 2wd

1982 Mastercraft Pro Star 190 Stars and Stripes

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Old 03-23-2009, 01:18 PM   #9
jbristo67
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Re: My TH350

???
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1967 SWB C10 396/400 factory air
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1986 Honda 70 Fourtrax

1991 Chevrolet K5 blazer 2wd

1982 Mastercraft Pro Star 190 Stars and Stripes

2002 Chevrolet Tahoe

2011 Nissan Armada

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Old 03-23-2009, 03:27 PM   #10
Longhorn Man
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Re: My TH350

then your converter will slip a bit more than you want and build up some added heat.
Won't kill your tranny real fast, but not good for a long life either.

Last edited by Longhorn Man; 03-23-2009 at 03:27 PM.
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Old 03-23-2009, 03:37 PM   #11
jbristo67
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Re: My TH350

Just talked to the tranny shop they said no big deal will just run 200 or so rpms higher in 3rd. I can live with that
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1967 SWB C10 396/400 factory air
factory tach (sadly had to send to a new home)

1986 Honda 70 Fourtrax

1991 Chevrolet K5 blazer 2wd

1982 Mastercraft Pro Star 190 Stars and Stripes

2002 Chevrolet Tahoe

2011 Nissan Armada

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Old 03-23-2009, 03:39 PM   #12
Palf70Step
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Re: My TH350

Yes, that is what I am told. A bit more slip. I don't have mine hooked up yet, but I have the harness to hook mine up whenever I get to the rerwiring stage on mine.
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Old 03-23-2009, 04:11 PM   #13
jbristo67
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Re: My TH350

My friend bought a truck with this tranny in it. It had been rebuilt and never run because the guy put a new cam in the motor and messed it up. Well my friend pulled the motor and tranny and gave me the brand new tranny. I was going to run a 700 but times are tight right now so I will run this one until it blows up
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1967 SWB C10 396/400 factory air
factory tach (sadly had to send to a new home)

1986 Honda 70 Fourtrax

1991 Chevrolet K5 blazer 2wd

1982 Mastercraft Pro Star 190 Stars and Stripes

2002 Chevrolet Tahoe

2011 Nissan Armada

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