Thread: 700R4 Hard 1-2

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I'll do that, Jimo. I see you're running a stroker, too. Monster Transmissions actually calls it "heavy duty performance" - it's one up from stock and one down from full blown race, supposed to be good to 450 hp. My GM crate motor is the HT383 with 340 hp and 435 lbs/ft so should be OK on that. It's in a '78 Caprice, hence my username!

Yeah, the guy who put it in for me tried to do right by me - he said it took him nearly a day to get the tv cable mounted and adjusted, with numerous test drives. I guess what puzzles me is that the only maker of an aftermarket tv kit for a Q-jet that I can find (Bowtie Overdrives) says you have to change the tv spring in the tranny. Guess I'll call them, too. Just want to have all my ducks in a row, so I wanted to ask the experts here first!

i had i stroker at 1 time yes with a rebuilt trans with the b&m strip kit and it slammed hard never broke anything though (knock on wood). i dont know what kind of power i was running but last year i had a 406 in front of the trans running 12.54s at 3560lbs. banging the gears with radial slicks. but i was running a th350. i realy think your 700r4 is allright unless you dont like the hard shifts

A lot of trans companies will make it shift 1-2 very hard like that for performance. It won't hurt it. Its all on the servo thats in the side of the case on the passenger side. My truck does the exact same thing that yours does. On hot days with my 102,000mile, 20 year old, worn out 305, I can get a second gear scratch on brand new Eagle GTII's...

If you don't like it, fix it. But personally I love that neck breaking jolt that you get when it hits second. And yes, the adjustment is in the TV pressure. If you turn it down, the shift will be more mild. The more you give it, the harder it hits. I have mine turned all the way open to help with milage on the highway. TV pressure in the 700r4 makes it shift later and more firm. If you like it, leave it alone because it won't hurt it. I've had my trans. in my truck for about 40,000 miles and it has had that very obnoxious 1-2 shift since day 1.

Actually MOST tranny shops replace that servo with what's called a "corvette servor" because it firms up the factory wishy washy 700r4 1-2 shift. Thats just my take on it. If your worried, you should call your builder and ask him about that monstrous 1-2 shift.