2014年9月7日 · The Muncie M21 is a close-ratio unit originally designed to be matched with 4.11:1 or 4.56:1 GM 4 Series differentials. The M21 was for higher performance cars. A close …

2012年3月9日 · How much HP will a Muncie 4 speed hold. How do you distinguish between an M21 and an M22. The M22 is what they called the "rockcrusher" right? Is that the better trans. …

2003年10月20日 · muncie m21 vs m22 Jump to Latest 7K views 3 replies 4 participants last post by kain13 Jun 4, 2006

2005年9月8日 · The M21 is somewhat stronger only due to the gear ratio being lower (2.20 versus 2.52 or 2.56). This is because gears multiply torque, so if you apply 300 lbs/ft to an …

2006年12月4日 · Muncie If you look at the retainer side that mates with the transmission there is a finish diameter the same size as the outside diameter of the slinger nut. It is down inside the …

2006年2月2日 · The only difference in Muncie synchros is from 1963-65 which had a support shoulder. Muncies from 1966-74 had synchros without a support shoulder. The earlier …

2010年8月8日 · The M21 is the strongest ratio aside from the M22 due to the lower helix angle of the teeth on the 22. You could add an iron midplate to beef things up. Torque is what breaks …

2014年6月10日 · Looking for a little help from the M21 Muncie guru’s. The M21 Muncie 4-speed in my ’65 C10 has a broken reverse shift stud. Is it possible to drill and tap the reverse shaft or is …

2003年6月3日 · I recently purchased a 67 Muncie M21 for my 69 Camaro. After uncrating it I noticed the input and output shafts seem to be a bit loose, not a whole lot. but enough that u …

2005年6月16日 · It was replaced by the Muncie in late 1963. The Muncie 4 speed was used in production vehicles until power levels dropped in 1975. 1975 was the first year catalytic …