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·Muncie 4 speeds were produced in two different ratios wide ratio M 20 and close ratio M 21 An extra heavy duty close ratio version M 22 was also offered on many of the big block high performance choice of transmission was dictated by the engine size and rear axle ratio many GM high performance engines came with M 22
·Nevertheless the original purchaser of this machine opted for the traditional four speed—another GM pinnacle the Muncie M22 rock crusher The M22 a close ratio box was so called because of the reduced angle on which its gears were cut which were stronger but considerably noisier than those in the wide ratio M20 and close ratio M21
·Physical Characteristics Inspect the transmission housing differences can be spotted between the Muncie models based on the bolt patterns and overall design Common Codes M20 Wide ratio mainly used in regular driving M21 Close ratio for high performance M22 Known as the Rock Crusher designed for high torque applications
·GM s goal with the Muncie four speed was to produce a better shift employing larger synchro cones He tells us both the M20 wide ratio and M21 close ratio transmissions were first offered in 1963 The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet s big blocks in the mid 1960s
Muncie 4 Speed Rebuild Kit 7/8″ w/207 Bearing $ Add to cart; Muncie 4 Speed O Ring Speedometer Housing $ Add to cart; Muncie M22 Rock Crusher Third Gear $ Add to cart; Muncie 4 Speed Rebuild Kit 1″ w/26 32 Spline $ Add to cart
· Also known as the Rock Crusher due to the whining sound these trannies make while upshifting 1st thru 3rd gears due to those "helical cut" straight gears By 1970 the output was larger like a Turbo 400 yoke and had the fine spline 26 input shafts two grooves = wide ratio tranny while NO GROOVES = 1st gear ratio
New Muncie M22 close ratio wide ratio or NEW Z Ratio Rockcrusher gear set is availabe with either a 10 or 26 spline input GM introduced an even more robust version of the Muncie transmission known as the M22 or "Rock Crusher " This transmission with its distinctive whine became synonymous with high performance cars of
·On this document the 4 speed transmission option code listed the transmission as an M20 In 1965 all 4 speeds were ordered initially by the M20 4 speed designation Depending upon the rear axle ratio Chevrolet supplied either the M20 wide ratio or M21 close ratio transmission at their discretion
·Use the M20 first gear wide ratio with the ratio and you will have a decent hole punch and still have a great cruising speed If you use the M21 first gear close ratio with the high speed close ratio rear end you will be changing it out very soon because the ratios are close on both ends
Buy Muncie M22 Transmission Wide Ratio Gear Kit GK M22W 10 Shop for all your M20 M21 M22 Muncie 4 Speed Transmission Parts at Wholesale Pricing Muncie Speedo Gears; Muncie Synchro Parts; Muncie Diagram / Drawing; Cobalt MU3 5 Speed; NV1500 S10 Transmission Parts NV1500 S10 Bearing Kits;
·Page 1 of 2 Muncie Upgrade posted in Driveline I m doing an upgrade to a Muncie gearbox that I have to be fitted back into my LJ 2 door I have run this box previously but being an M20 with the following ratios 1st= 2nd= 3rd= 4th=1 I removed the Muncie 7 fitted a Saginaw with similar ratios to the Aussie M20 whilst the Saginaw has served me well it
Recent Comments Randall D Resler II on Auto Gear Upgraded Ultra Case M22Z Rock Crusher 4 speed Perfect Performance with to Rear End Gears SALE EXTENDED Jeff Collins on Muncie Super Duty M23 Upgraded Ultra Case 4 speed Road or Drag Racing Rock Crusher SALE EXTENDED Thomas N on Muncie Super Duty M23 Upgraded Ultra Case 4 speed
NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $ No Price New Muncie M20 Wide Ratio OR M21 close ratio gear set M20 gearset also available in Italian Muncie reverse and idler gear set or individual gears From $ Muncie Front Idler M20 M21 M22 Muncie M20 M21 18 tooth front idler WT297 10
·come guys every gearhead knows every muncie is a rock crusher every 327 came out of a corvette and all 12 bolts are posi s I didn t even read this on the internet 70% of the guys at the gas station tells me this when I m gassing up they all had that rare 68 chevy with a corvette 327 rock crusher muncie and a 12 bolt posi that they would shift from first to
Find many great new & used options and get the best deals for Chevy GM Muncie M22 Rock Crusher Wide Ratio 4 Speed Transmission 26 Spline at the best online prices at eBay Free shipping for many products ALL NEW GEARS Muncie Close Ratio M 22 Rock Crusher Four Speed Transmission ALL NEW GEARS $2 Last one $ shipping
description new muncie m22 z 4 speed ultra wide ratio interstate / economy yes a rock crusher no the engine / bellhousing / shifter / etc shown in the pictures here are not included — price is for transmission only but does include a steel thrust button upgrade — ask us these are brand new factory assembled muncie transmissions with heavy duty ultra case
·Some of the best Muncie builders participate on that page Muncie RPO Codes Just three types of Muncie 4 speeds are available based on the RPO regular production option code used when a car was ordered the M20 standard wide ratio M21 close ratio and M22 heavy duty close ratio The M does not stand for Muncie
New Muncie M22 close ratio or wide ratio Rockcrusher gear set is availabe with either a 10 or 26 spline input Close ratio 26 spline gear sets available in Italian or Korean made You must select whether you need a wide or close ratio & which input spline count 10 or 26 Fits all Muncie applications with 1" countershaft pin 1966 74
NEW Muncie M22 SUPER ROCK CRUSHER 4 speed $ No Price New Muncie M20 Wide Ratio OR M21 close ratio gear set M20 gearset also available in Italian Muncie reverse and idler gear set or individual gears From $ Muncie Front Idler M20 M21 M22 Muncie M20 M21 18 tooth front idler WT297 10
1969 PONTIAC FIREBIRD MUNCIE M22 ROCK CRUSHER WIDE RATIO PRO TOURING POSIThis is a 1969 Firebird that I have been working diligently on for the last year nd I just got it running nd did the engine b Muncie M22 Transmission all brand new Brand New Wide Ratio M22 Gearset UsA made gears Brand New Nodular Steel Mid Plate Complete new
·Although some claim that the M23 is a rock crusher it is indicated that this box was assembled in both wide and close ratio components and also with straight cut gears common to the rock crusher M22 transmission This chart so far has been very accurate in identifying the muncie trans over the years so I wanted to share
Muncie 4 Spd Car M22 Close Ratio Gear Kit This M22 Gear kit will have a 1 Countershaft pin 16 Spline input Close Ratio 1st gear The kit will include the Input shaft 4th gear Countershaft 1st gear 2nd gear 3rd gear and Reverse Idler Input 26 Tooth 26 Spline Close Ratio Counter Shaft R27 22 19 17 Big 1" Pin Close Ratio 1st Gear 36 Tooth 2nd Gear 30
·The ratios are first second third and fourth The ratio change between the gears is 39% 24% and 19% In order for you to get a "close ratio" Muncie your car had to be equipped with at least a rear end gear You needed at least that low of a final drive to get your car moving Goodbye Wide and Close Ratio
THIS IS OUR Complete M22 gear train for the Muncie 4 Speed with 26 clutch spline input This kit will replace original M20 / M21 or M22 sets You receive what you see input cluster 1st 2nd 3rd reverse drive idler This is the M22 17 degree gear set of the famed "Rock crusher" in original "close" ratio which are as follows 1st gear to 1 2nd gear to 1
