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Old 07-15-2011, 07:13 AM
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1988 700r4 against 70 350 block

Hello , Just built a 3 wheel trike with 350 engine and 350 trans out of a 70 Nova only problem is turnning about 3000 plus rpm at 65 mph. Picked up a 700r4 from auto recycle yard,sold as good trans from 4.3. Should it bolt up
without any problems? Engine has stock carb as I have read that the cable
operates the shifting of the trans and is very important to get right. Thank you for any help that you bcan give me as I have never had anything with overdrive.

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Old 07-15-2011, 08:57 AM
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It should bolt right up. The TV cable will DESTROY your transmission if not right. They sell carb adaptors and kits to prevent that from happening. I have been told '88 and up are the better transmission.
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Old 07-15-2011, 09:50 AM
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As said the 88 and up models are best. In the early 90`s, somewhere around `93 or `94, the 700R4 became the 4L60E which is operated by the engines computer completely. Also as mentioned yes the TV cable has to be set correctly but you also have to think about the torque converter lock up circuit. It locks the converter in OD so the converter has no slippage. You can order a kit from painless to connect it up to work properly. You can also chose not to use it. If you chose not to use it, the tranny will need a good sized external tranny cooler which I would install regardless. Why it needs it more so without lockup is because the converter is less efficient which makes it slip more and the more slippage the hotter it gets and heat is the number 1 killer of automatics. However in any case I wouldn`t count on the built in cooler in the radiator to cool it.
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Old 07-15-2011, 12:46 PM
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700r4 ?

Thanks DoubleVision and 455Olds for the comeback. I just measured my trans from the block to the tailpiece.I put a straightedge across the tailpiece
to get it exact, it is thirty and three quarters inches exact. In Jeggs and Summit they list the length of their trans at 30". Mabey I don't have a 700?
Thanks again for any help, Just want to cut the driveshaft once.
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Old 07-15-2011, 03:22 PM
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Quote:
Originally Posted by gyrocopter1
In Jeggs and Summit they list the length of their trans at 30". Mabey I don't have a 700?
Or maybe Jegs' and Summit's lists aren't that accurate...... I believe Bowtie Overdrives has a good trans ID chart, I'd check there. They specialize in transmissions, Jegs and Summit specialize in volume sales.
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Old 09-19-2011, 08:08 AM
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yes the cable controlls the shifting if its not hooked up , it will burn your cluthef

Quote:
Originally Posted by gyrocopter1
Hello , Just built a 3 wheel trike with 350 engine and 350 trans out of a 70 Nova only problem is turnning about 3000 plus rpm at 65 mph. Picked up a 700r4 from auto recycle yard,sold as good trans from 4.3. Should it bolt up
without any problems? Engine has stock carb as I have read that the cable
operates the shifting of the trans and is very important to get right. Thank you for any help that you bcan give me as I have never had anything with overdrive.
yes it has to be hooked up, it makes it change gears, if its not it will fry your clutches
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