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Old 12-22-2003, 01:29 PM
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700r4

Hi,

I have a 1881 Chevy Van with a 350ci stock small block with a single turbo setup. I currently running a TH350 that is adjusted so it shifts at 4500RPM. I have a 3.73 rear end. So I drive slow on the highway because the high RPM.
I’m thinking of installing a 700R4, but I heard that these transmissions are not so strong. I heard that the problem is the TV cable. It burns the clutches.
When I put a manual valve body on a 700R4, will it make the transmission stronger?
I want to make a “bullet proof” transmission, but I think the weak link is the TV cable.
I need the overdrive, so the only thing is can get is the 700R4.
Thanks!

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Old 12-22-2003, 01:34 PM
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i just toasted a 700r4 in my 86 z28 and that just behind a very very mildly built 305. i don't think the TV cable is the prolblem, i think just in general the insides of the tranny are weak. a friend of mine builds transmissions and he told me he could build a VERY strong 700 for about 1200 bucks, plus the initial cost of the tranny
B&M makes a kit to rebuild the clutches and the insides of the tranny, this runs about 350 bucks, and would definately make the trans stronger, hope this helps

russ
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Old 12-22-2003, 01:39 PM
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You are working with half truths. Do a search on this site - this topic has been discussed in great detail. In summary, the GM OD trannys (2004R and 700R4) are both very good units and can be made to handle +400hp very reliably. It takes a few more mods than just a shift kit but is within the average rodder's budget. Not that much worse than beefing up a TH350 or TH400.

You are correct that the throttle cable is a critical adjustment as you might expect for a machine with all of the features that these have. Can't set it 'by ear' like you can on a TH350.

Don't be frightened off by the urban legends you hear. Properly set up, one of these will solve your problem wonderfully.
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Old 12-22-2003, 03:38 PM
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Quote:
Originally posted by willys36@aol.com
Don't be frightened off by the urban legends you hear. Properly set up, one of these will solve your problem wonderfully.
I agree wholeheartedly! A lot of the misconceptions about these transmissions started when they were "new". They were cheaply built by the factory and yes, they did have their problems, but they have been around long enough now that all of the weaknesses have been worked out and most any shop can build a very stout piece for a little cash outlay. The cost is coming down every day. These trannies can be made to run very hard behind 5 and 600 horse big blocks so build your 700R4 and enter the 21st century...
Mark
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