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post #1 of (permalink) Old 01-25-2005, 11:34 AM Thread Starter
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Lock up torque converter

What are they? I have a th 350 C that I want to use in a project YJ. Just wondering if the lock up torque converter is an advantage or disadvantage.
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post #2 of (permalink) Old 01-25-2005, 12:00 PM
 
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Re: Lock up torque converter

Its a mechanism that when engaged will create a near 1:1 ratio between engine speed and transmission speed. How it does this exactly I'm not sure on, and would be interested to know. It is designed to reduce your engine speed at highway driving thus improving fuel economy. Its also benefical in descents as it will provide engine braking, but usually that'll require some modification to allow it to be engaged in lower gears (at least thats the case for the 700R4).
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post #3 of (permalink) Old 01-25-2005, 03:49 PM
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Re: Lock up torque converter

I don't believe a lockup converter is available for the T350, only the newer 700R and it's electronic follow on the 4L60E.
The transmission has to have a second shaft/port to send hydraulic fluid into the tourque convert to cause it to lock. the 350 and 400 does not have that.

Anyway, mc is correct, it does lock up giving your a 1:1 ratio. One of the side benifits is reduced heat. The torque converter creates a lot of heat, especially at low RPM's.
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post #4 of (permalink) Old 01-25-2005, 05:10 PM Thread Starter
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Re: Lock up torque converter

According to this web site the th 200, 250 and 350 all came w/ a lock up converter. My trany does have the c stamped on the side and has a couple of electrical conectors comming out of it.

Does it only lock up when in high gear or can you lock it up in first to reduce slip? Can this be something I can turn on with a toggle switch when I want to lock it up and off when I don't?
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post #5 of (permalink) Old 01-25-2005, 05:23 PM
 
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Re: Lock up torque converter

[ QUOTE ]
According to this web site the th 200, 250 and 350 all came w/ a lock up converter.

[/ QUOTE ]

Yep one of the guys in our club has a 350/T350 in his CJ5 with the lockup torque converter.
[ QUOTE ]
Can this be something I can turn on with a toggle switch when I want to lock it up and off when I don't?

[/ QUOTE ]

Yes again,,, this is exactly how he has his set up. As to what was involved in the set up I have no clue.
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