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I have to assume you mean "What is a Doug Nash 4+3?" If that is the case then I can answer that question. The Doug Nash 4+3 is a transmission that Chevy used in the Corvette from 1984-1988. It is a Borg Warner ST10 gear box with a Doug Nash overdrive unit mounted on the rear of the transmission. It allowed 4 forward gear ratios by shifting the manual ST10 portion of the transmission and an additional 3 forward ratios when the overdrive unit was engaged in gears 2,3 and 4 thus the name 4+3.
1984 Doug Nash overdrive should work the same as the other c4 corvette's that had these bolted to the back of the super t-10 transmission to avoid the gas guzzler tax. They usually work by not engaging in first gear, then, engaging in second, third and fourth with the ability, as long as the engine is not above a prescribed rpm so as to explode the engine, to jump back into the standard gear upon depressing the gas pedal sort of like going into passing gear. I like the Doug Nash. It works well if you change the fluid and filter ever ten thousand miles as recommended. I do not know for sure, but I think that since the Doug Nash was an after thought, the unit is bordered to closely by the exhaust system where it forms a Y into the catalytic converter and so will overheat and destroy the fluid. Mine works just fine, and I hear that the switch to a Richmond six speed costs about twice as much as to rebuild the Doug Hash and lasts about as long. I use the overdrive on the highway mostly and the standard four speed in town.
ANY GM SMALL BLOCK WILL FIT. I HAVE PUT A SMALL BLOCK CHEVY ENGINE IN A 280Z A 260Z AND A 300ZX.THEY WERE MATED TO AN AUTOMATIC EXCEPT FOR THE 260Z THAT RECEIVED A DOUG NASH 5 SPEED. THE SPEED AND POWER IS UNREAL.
Doug Dunford has written: 'Grace & speed'
Mount Doug High School, Victoria, BC, Canada.
The cast of Nash - 2013 includes: David Beckham as himself Kobe Bryant as himself Snoop Dogg as himself Doug Ellin as himself Andy Garcia as himself Ron Howard as himself Steve Nash as himself Owen Wilson as himself
Doug Floyd goes by Doug.
Doug - 1991 Doug's Cartoon Doug's Monster Movie 3-8 was released on: USA: 1993
Doug - 1991 Doug Runs Doug Clobbers Patti 4-7 was released on: USA: 1994
Doug Sahm went by "Sir" Doug.
Doug - 1991 Doug's Birthday Present Doug's Fan Club 4-6 was released on: USA: 1994
Doug - 1991 Doug Takes a Hike Doug Rocks 1-4 was released on: USA: 1 September 1991