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Ansair coach 8v71 Detroit Diesel 6 speed spicer gearbox

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8v71's were a very popular engine in buses and trucks up until they failed to meet EPA standards and modern 6 cylinder 4 stroke engines replaced them. General Motors made several models of v design 2 stroke supercharged engine, 4/6/8/12v71's and its bigger brother, the 6/8v92. Had a couple of 8v71's in bus conversions, They can run 250 to 350 hp [turbocharged] Still a lot of them around the world, but if you are not a DIY kind of guy, you might have trouble finding someone to work on it. Most bus conversions in the US have converted to Allison auto transmissions. 

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The Spicer manual transmission is not synchronized, you have to double clutch and use the engine to match the new gear speed or you'll grind the gears when you shift.  It's a technique truck drivers have mastered with practice but is a pain for day to day driving.  This is why most bus conversions have converted to the Allison automatic transmission.

Edited by Lou Schneider

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