10.02.2010, 13:00
Könntest recht haben, Fabi!
Ist aber kein echtes 7-Gang Getriebe, sondern "nur" ein 4-Gang-Schalter mit dahintergeschaltetem Overdrive:
The 4+3, or as it was known by Corvette engineers back then, the "Doug Nash" was a four-speed manual transmission with an electro-hydraulic overdrive grafted onto the back. Generally the OD worked in the upper three gears, hence the name "4+3.".
When the Borg-Warner got out of the four-speed manual trans business in the late 1970s, it sold the design and tooling for the "Super T10" (used in the Corvette from about 1975 to 1980) to the DNE Corp, which was started by hotrodder Doug Nash.
Nash, sold GM and Dave McLellan on a slightly-strengthened version of the Super T-10 with an electro-hydraulic overdrive unit Nash marketed for RV applications.
Well, the end result was the 4+3 and unfortunately, it was a poor example of quality, reliability and durability. The gearbox section was a pretty good piece, but the overdrive unit was a disaster. The 84-86 OD's are notorious for problems. The 87 and 88s are better, but still a problem child, especially if the car is raced a lot.
_________________
Hib Halverson
Gruß
Rico
Ist aber kein echtes 7-Gang Getriebe, sondern "nur" ein 4-Gang-Schalter mit dahintergeschaltetem Overdrive:
The 4+3, or as it was known by Corvette engineers back then, the "Doug Nash" was a four-speed manual transmission with an electro-hydraulic overdrive grafted onto the back. Generally the OD worked in the upper three gears, hence the name "4+3.".
When the Borg-Warner got out of the four-speed manual trans business in the late 1970s, it sold the design and tooling for the "Super T10" (used in the Corvette from about 1975 to 1980) to the DNE Corp, which was started by hotrodder Doug Nash.
Nash, sold GM and Dave McLellan on a slightly-strengthened version of the Super T-10 with an electro-hydraulic overdrive unit Nash marketed for RV applications.
Well, the end result was the 4+3 and unfortunately, it was a poor example of quality, reliability and durability. The gearbox section was a pretty good piece, but the overdrive unit was a disaster. The 84-86 OD's are notorious for problems. The 87 and 88s are better, but still a problem child, especially if the car is raced a lot.
_________________
Hib Halverson
Gruß
Rico
No one here gets out alive ... J.D.M.