- #700r4 corvette servo in used trans manual#
- #700r4 corvette servo in used trans full#
- #700r4 corvette servo in used trans tv#
No transmission is perfect, even if it can be damn reliable, and the 700R4 is no exception – such as the infamous problematic TV cable that frequently needs to be readjusted, or replaced. To turn it this sluggish but reliable piece of GM machinery into a respectable racing transmission, the first step is to address its flaws. It takes a little bit of magic and ton of experience (and aftermarket parts), but you can turn a 700R4 into a 650 hp, 600 ft-lbs power house, complete with an upgraded transmission cooler to avoid overheating, a brand-new torque controller, and several hardened and heavy-duty replacement parts, including the casing itself, the O/D ring, stator shaft, new bearings and more. But it’s still got plenty of flaws, and out of the box (straight from stock), your 700R4 isn’t going to hold a candle to a well-furnished custom. It may have come out in the 80s, packed into a 1982 Corvette, but the 700R4 is as solid an AOD transmission as you’re going to get even today, all without the need for computer finetuning like more modern transmissions. 700R4 Improvements for High Performance Racing But a custom built 700R4 is made of sterner stuff, and reduces the lag time introduced by sloppy and sluggish shifts. Racing with a stock 700R4 while in overdrive risks the integrity of the O/D band and limits your performance in a drag race, and can ruin the transmission. The only real difference visually is the front bell These aren’t what you’re looking for, and they’re also typically much rarer. The 700R4 is compatible with most Chevrolet 90-degree small block and big block patterned engines, although a different version of the 700R4 exists for 60-degree patterned engines.
#700r4 corvette servo in used trans manual#
It went through a name change in 1990 as the 4L60, but never actually transitioned from being the same transmission as it always was, until GM ushered in the 4L60E as an electronic replacement to the automatic manual transmission. The 700R4 was introduced as a replacement to the TH350, built for car and truck platforms. Those savings are only possible through the transmission’s overdrive, which allows a car to basically drop down its engine’s RPM and reduce horsepower needed on flat land while maintaining speed.
#700r4 corvette servo in used trans full#
Unlike many other transmissions at the time, the 700R4 is an automatic overdrive transmission, which means it’s far more fuel-efficient, giving you much more mileage out of a full tank – as much as 30% more. The 700R4 is no different, and its popularity is owed mostly to the fuel economics of the late 20th century, when gas-guzzling was becoming a heavy hit on many an enthusiast’s wallet. Evolution of the GM 700R4 Transmissionīehind every great piece of machinery is a lengthy line of trials and errors, experimentations, innovations and breakthroughs. But it’ll take some surgery to get it there. In the right hands, you’ve got yourself a serious racing transmission. Trust us: you’re not cutting into your car’s potential with a 700R4. The reason that’s such great news is because if you’re driving a Chevy (from your uncle’s old pickup to a hot 90s Camaro), chances are you’ve already got a 700R4 sitting pretty in your rig, and working with what you have – one of the finest pieces of GM workmanship in terms of sheer reliability as an AOD – is going to save you the small fortune you might’ve had to spend on a brand-new transmission. That’s why it’s so important to have the right transmission for the job – and if you’re looking for a classic, no-fuss overdrive automatic transmission with four speeds, then a solid choice is to start with a stock 700R4 and go from there. A race car and a van will have differently built transmissions, and transmissions come as automatic, continuously variable, automated manual, dual-clutch, and more. It’s a complex system of components built with the specificity of an orchestral piece made for the climax of a classic opera performance – ideally, transmissions are made to perform in certain environments and under specific conditions. And while every layman focuses on the engine, it’s the transmission where the real magic happens.Ī transmission is more than a few gears and an input and output shaft. Racing rigs are built for performance and sheer efficiency – there’s nothing superfluous about a car made to go well over a hundred miles per hour.īut some machinery deserves a little more credit for the demanding work a car goes through to attain such speeds, and maintain them. They say a car is the sum of its parts – if you take but one piece out, then a well-made racing machine just flat out won’t work.
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