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Old 03-24-2004, 02:20 PM
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350 lock up transmission

Hi everyone I have a 57 chevy pickup with a stock 327, and a 350 transmission right now. The truck runs great but I would like to put an overdrive transmission to get better driveability on the highway and better gas mileage. I called a local wrecking yard and asked for a 700r tranny, but they didnt have any. The guy did say they had 2 350 lock up tranny's and he told me that they are just as efficient as the 700r and would be better because they are stronger. I dont really know too much about these 350 lock ups, so I was wondering if these would be a good route to go, and are these good transmissions? Is their any electrical adaptions on this transmission, in order for it to lock up? I'll appreciate your responses.

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Old 03-24-2004, 02:44 PM
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Smell

If it looks like a fish and smells like a fish, it could be a dog. NOT I don't think so. I would hold out for the 700r4. There has been some good discussions here on transmissions. Do a search on the 700r4 and read a few. My version is, so long as you are not pulling anything with weight, you should use the 700r4. If pulling a heavy rig, I think you should use the th400. Be I ever so humble. But, I do think you should hold out for your original idea. Check some of the out lay area junk yards. Hell, check the whole dam state. You can find them, lot of them. That guy just doesn't have one.

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Old 03-24-2004, 04:50 PM
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Ya your wrecking guy is full of you know what. A well built 700r4 will be just as strong as a thm350 and will offer much better fuel economy (with the right gearing of course)
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Old 03-25-2004, 02:10 AM
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A 200-4R is the same length as a short-tail T350 so your driveshaft won't need shortening. It also has less of a gap between 1st & 2nd gears than a 700R4.
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Old 03-25-2004, 05:27 PM
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So what would you recommend for my truck a 700r4 or 200r4? The rearend I have in my truck is from a 78 camaro, I dont know the gearing I think its something like 3.08.
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Old 02-13-2006, 02:56 PM
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converter lock up

Along these same lines , I once saw a converter that could be locked by a switch on the dash after speed was ok . It was on a R 700 trans. Does any one know the wiring procedure for this setup???? sportymickey
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Old 02-13-2006, 05:05 PM
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Sounds like the guys an idiot. I dont know how you can say its just as good . . . the 700r4 has another whole gear not to mention the option of a lockup converter.
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Old 02-13-2006, 06:28 PM
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this thread brought up by sportymickey is 2 years old........


read the posting dates folks.

If you need furthur information on a lock up wire diagram , please start a new thread
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