Corvette 4 3 manual transmission

Corvette 4 + 3 Overdrives. We have been rebuilding Corvette 4 +3 Overdrives since This transmission incorporates a Super T10 4 speed with an automatic overdrive. The overdrive can come on in second, third, and fourth gears. thus 4 + 3! It is only used in Corvettes made in to and is not recommended to be swapped into street rod applications.  · 4+3 Manual Driver: Chevrolet Corvette. C4 Corvettes are often talked about disparagingly, but it’s still a great option for an entry-level classic that is easy to live with, cheap to maintain, and coming back into style as everything from the s is made cool again. This example has the rare and desirable 4+3 manual transmission, and presents well enough for Estimated Reading Time: 3 mins. Here is the fairly rare mechanical oddity of the early C4 Corvettes - a Doug Nash 43, essentially a Super T10 4-speed with an overdrive that is available in 2nd, 3rd and 4th gears. This one appears to be an early 85, based on the presence of the tv cable and no overdrive button in the shift knob. It is complete, including bellhousing and shifter and was purchased from SoCal Vettes a.

· Check out this Tech Article on the 4+3 transmission in ''88 Corvettes. the bad press about theDoug Nash 4+3 manual transmission. in the ''88 Corvette, the 4+3 was a fickle beast. This transmission incorporates a Super T10 4 speed with an automatic overdrive. The overdrive can come on in second, third, and fourth gears. thus 4 + 3!. According to posts on some internet forums, the Overdrive feature frequently gets out of order. If this happens, the 4+3 transmission becomes a standard manual solution with no overdrive. The key issues were defects with bearing in the carrier assembly, a direct clutch thrust washer breakdown, and a pump sealing issue. The 4+3 is a standard transmission(4 speed) with a two speed(direct drive overdrive) trans bolted to the rear of it. The unit was designed/built by Doug Nash Transmission for the ''88 Corvette. It was a decent idea, and did work well to reduce the emissions, and allow the car to pass the Federal EPA fuel mileage, and emissions requirements.

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