If you have a rotational whirring noise at an idle with a manual transmission in neutral; the drive teeth on the headset (input gear and countergear) are worn. That also …
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So, I don't know what it sounds like in gear. It was hard to get the transmission in. The front bearing cap (new aftermarket part) was so tight in the bellhousing (OEM GM 621 …
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Simply put you can say it lowers the quality of the sound, which may sound like something undesirable but it can actually add a bit of aesthetically pleasing nostalgic charm. This effect is often used to add a 'retro' quality to sounds, and …
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I became aware of the nickname, likely a motorhead created comparison of the rugged transmission to rock quarry equipment, when, in late '68, a buddy traded a whipped '66 …
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I had a 71 GTO with a M22 "rock crusher". This was an absolutely stout transmission. Had a distinctive "whine" due to the slanted gears.
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I have a lot of gear whine in 4th gear (the other gears whine too, but this one is the loudest). The transmission functions just fine, shifts smooth, stays in gear, and the only noise it …
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It's not a loud whirring sound like a throwout bearing making contact, but you can hear it. I spoke to the guy who went through it and he said that noise is normal. It's quieter and …
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The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which …
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The M20 / M21 transmissions when in good condition are a fairly quiet transmission. If you want to know what a M22 sounds like get the movie 2 lane blacktop. …
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M22 is legendary because of the sound the gears make when you drive it. Other than that not much different than any other M20, or M21, other than a slight ratio difference. X2 …
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The Muncie Miracle: Getting to know Chevrolet's most legendary four-speed transmission. Jim Smart Writer Courtesy Of Summit Racing Photographer Aug 7, 2018. Few things excite like the sound and feel of an old …
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Hi, I bought a Muncie M22 to replace my M20. I am going with a big block and want the most sturdy one. And the rock crusher sound is neat too. Casting: 3925660 Years: 1968 - 1970 Input shaft has no rings : 1967 - 1972(2) …
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After total overhaul of my -72 T120V Bonneville I still have some mechanical noise, mainly from the timing area. Engine has new crank, all new bearings, new bored (0,10mm …
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Auto Gear Upgraded Ultra Case M22 Rock Crusher 4-speed. Perfect Performance Replacement. ... M20. It drives like a charm and works really (!) well. Shipping to Europe was also no problem but production of the transmission …
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I do not see that just changing rearend gears would increase the noise from the transmission unless the pinion angle is wrong...if the pinion angle is wrong that may highlight …
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The M20 and M21 transmissions produced from 1963-'74 are easy to identify in both wide- and close-ratio units. The M22 to come later in 1967-'74 is also a close-ratio unit, but much stronger than ...
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You exisitng Muncie transmission case will accept the M-22 gear set if it has a 1" (25mm) counter shaft in it (all Muncies after 1966 have the 1" countershaft but, you could be …
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Loud clicking noise, sounds like it could be your gear mesh is too tight. If your truck has slowed down a little and motor heats up more than normal it could be. Maybe check and …
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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 …
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Across the top of the page are the words "First Build 4/15/65 – 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans." By comparing these M22 transmission assemblies to Chevrolet's 1965 transmission identification codes, …
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This bumbed me out since I had previously read that this was an indication that it was a Saginaw not a Muncie. It does have a 7 bolt side cover. Doe this mean it's still an M22 …
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You have a choice of a original completely rebuilt GM Muncie M20, M21 or M22 Rock Crusher transmission. With this new kit you also get all the hardware needed to get the job done right the first time. Correct bolts will include head …
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How loud it is and what kind of noise goes it make or compair to? What is the big deal with the "Ultimate 4-Speed"?
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The Muncie four-speed transmission has its roots back to 1935 and the U.S. patent number 3,088,336 along with an engineer named James W. Fodrea. ... Few things excite like the sound and feel of an ...
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Is the noise a chatter? i have the m22 rock crusher in my 69 rs camaro with 3.73 gears and it is noisy. It's beyond the typical Muncie whine. Its hard to explain. But if I am I the …
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the "rock crusher" name comes from the noise generated by the reduced helix angle on the gears... Not entirely sure, but I think the new "M22 Wide" still uses the same helix …
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the rock crusher transmission gears are straight cut, you stand 300 yard away from a car with this trany and you will here it whine from any angle. plus on any high excelleration …
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Let's tear apart an M22 to get a true sense of why the transmission sounds the way it does, and learn the story of the Muncie, leading up to the infamous "Rock Crusher" and what …
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These 4 speeds sound like a blower drive. For the real gear head the best documented movie that sports a real M22 in a car is the famous movie " Two Lane Black Top ". You can really hear this gear box howl in the background as …
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I do not claim to be a transmission expert and could be wrong but the "real" rock crushers had straight cut gears....not helical cut gears. I believe they were first released by GM …
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