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Old 05-18-2006, 10:00 AM
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how to install 700r4 in chevy

I have a 66 Nova with a 283 and a Pwr gluide. So, should I get a th350 or a 700r4? I know how to install a th350 but not a 700r4. Is there any secrets. The cost is probably about double for the 700r4....is it worth it?

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Old 05-18-2006, 10:23 AM
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Not enough background... Justification depends on your use of the car. I it a Racer? Cruiser? Daily driver? Is milage a concern? If it's not a daily driver and just a weekend cruiser figure the added cost for the O.D. and work that back into gas money... Is it worth it? Does the PG work fine? Does it NEED to be fixed if it's not "broken"?
The O.D. trans will cost more up front then a 350TH but is the cost justifiable in your eyes? The swap won't be much different then the 350TH as far as parts goes other then a new wiring harness for the O.D.
Just asking...
Mark
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Old 05-18-2006, 11:23 AM
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Sorry, this is a daily driver. The power glide is just fine. 65/70 mph is 2800 to 3200 rpm a little to high for long trips. Not to mention $3.25 per gallon of regular gas!
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Old 05-21-2006, 04:29 PM
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Th 350 is a darn near direct bolt in, but you have to notch the tranny cross member and re weld the mount like this:


Real easy took me about 1 hr to do. BUT this will yield the same final drive, but get you a better hole shot. Your 66 should have 3.08's or 3.336's but Whit the small 14"stock wheel what do you expect. You can increase the height of the rear tires to lower the final drive RPM, or even change rear gears also. ALL this could be done for less than a 700 swap with requires a new cross member and a bit of finessing of the tunnel to get the tranny to fit as well as shorting the drive shaft, EXPENSIVE torque converter, some way to lock and unlock the converter.......
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Old 05-21-2006, 05:22 PM
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I would suggest the th350, just cause they're
everywhere and its almost a bolt on, the cases
are about the same size as the powerglide. According
to a book i have here are some measurements of the
trannys so you can compare and even measure some so
you know about how much you would need to fabricate to make fit..
Also if you do quite of bit of traveling i think the overdrive would be
great to have.. hope the table below helps on your decision.

.........................Case length........Overall Lenght........To trans mount
Powerglide Long.....15 1/4"...............27 1/2"...................20 1/2"
Powerglide Short....15 1/4"...............27 1/4"...................19 1/2"
350 Short.............21 5/8"...............27 5/8"...................20 3/8"
700R4..................23 3/8"...............30 3/4"...................22 3/8"

Last edited by aztek_warrior; 05-21-2006 at 05:29 PM.
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Old 05-22-2006, 11:21 AM
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OK I'm going with the 700r4......now anything good and or bad about bowtie overdrives transmissions? This is where I think I might buy.
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Old 05-23-2006, 07:58 PM
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the TV cable adjustment on the 700 is IMO the #1 cause of trans failure by people installing them wrong, this cable has to be installed and adjusted perfectly for proper function,

a 700 is pretty much a 350 with overdrive,


Brendan
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