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#1
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M-22 Transmission question....
I have a 66 Stingray with 327/350 engine and manual transmission. I drive
it every other week. When I start up, its hard to get it in gears and without a little grinding. When it warms up with a some driving, all is fine. I think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? What tranny oil is good to change it too? thanks! |
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#2
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To start, unless you put in an M22 or know the guy who did, you probably
have an M20 if it is a wide ratio or an M21 if a close ratio. An M22 is really pretty rare and didn't come originally with any engines but the baddest of the bad. But your problem does not matter to the transmission type. It is a case of gear oil being too cold. It probably has the 90w regular gear oil and when it is down around 30 degrees, it is about as thick as mud. Changing to the 80w oil for winter will help. The spec calls for SAE 80 or SAE80-90 Multi-purpose Gear Lubricant meeting requirements of U. S. Ordnance Spec. MIL-L-2105B. Many people use a synthetic gear lube which eliminates the cold weather thickening. Long ago, many used Amsoil, however, while racing I had two transmissions come apart that ran Amsoil. I cannot conclude definitely that Amsoil did the deed, but returning to Valvoline standard High Performance 80w90 non-synthetic oil and had no more transmission failures. Your other choice is to let the car warm up a few minutes before trying to drive off. "js" > wrote in message ... > I have a 66 Stingray with 327/350 engine and manual transmission. I drive > it every other week. When I start up, its hard to get it in gears and > without a little grinding. When it warms up with a some driving, all is > fine. I think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? > What tranny oil is good to change it too? > > thanks! > > |
#3
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"js" > wrote in message ... >I have a 66 Stingray with 327/350 engine and manual transmission. I drive >it every other week. When I start up, its hard to get it in gears and >without a little grinding. When it warms up with a some driving, all is >fine. I think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? >What tranny oil is good to change it too? > > thanks! Sounds like the clutch is dragging. If you stop in gear, hold the clutch all the way to the floor, and shift into reverse does it grind? If so, the clutch is the problem. You can also start it in gear and see if the clutch disk is just sticking to the flywheel. Al |
#4
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"js" > wrote in message
... >I have a 66 Stingray with 327/350 engine and manual transmission. I drive >it every other week. When I start up, its hard to get it in gears and >without a little grinding. When it warms up with a some driving, all is >fine. I think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? >What tranny oil is good to change it too? > > thanks! I have both the new and the old and in this cold weather they both tend to get sticky while shifting. Just remember you're the brains of the driving methods used so you can keep the car running right. Mechanical things work harder when the oil/lubricant gets stiffer in cold weather. Adjust for it. -- Dad 05 C6 Silver/Red 6spd Z51 72 Shark Black/Black/4spd |
#5
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If your sitting still with the clutch in and you actually
hear the gears "grind", and the car doesn't creep, I gotta think syncros. But if you feel the car try to creep forward when going into first then it might be the clutch not completely disengaging. Put a half/turn or so in length on the rod at the bellhousing. You can go as far as you like as long as there is still just a tiny bit of slack when the pedal is in the complete UP position. You don't want any pressure on the throw out bearing when the pedal is completely up. Cold weather will definitely cause it to be stiff going into first gear, sometime pretty dang stiff, especially if you have the shorter Comp Plus shifter and handle in it. But you shouldn't hear any "grind". js wrote: >I have a 66 Stingray with 327/350 engine and manual transmission. I drive >it every other week. When I start up, its hard to get it in gears and >without a little grinding. When it warms up with a some driving, all is >fine. I think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? >What tranny oil is good to change it too? > >thanks! > > > > -- Ric Seyler Online Racing: RicSeyler GPL Handicap 6.35 http://www.pcola.gulf.net/~ricseyler remove –SPAM- from email address -------------------------------------- "Homer no function beer well without." - H.J. Simpson |
#6
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ZombyWoof wrote:
> > Isn't this the Tranny that was lovingly referred to as the "Rock > Crusher"? Yup. |
#7
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"ZombyWoof" > wrote in message
... On Thu, 10 Mar 2005 11:06:42 -0600, RicSeyler > wrote something wonderfully witty: Isn't this the Tranny that was lovingly referred to as the "Rock Crusher"? Yes, had one in my 68 GTO. Sounds normal for winter. He should let it run a bit to warm up before he puts it in gear. These days, I'm kind of partial to the Lucus brand of Synthetics for gear oils. -- Charlie !993 Corvette Convertible |
#8
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In article >,
ZombyWoof > wrote: > Isn't this the Tranny that was lovingly referred to as the "Rock > Crusher"? Yes, but if so, it's certainly not likely the original tranny. There were only 15 installed in '66 (and I would wager they went into racing Corvettes). For every year they were offered, they were always a super-low quantity factory installed item. Additionally, the OP only mentioned grinding when starting cold - as I understand the M-22, it was noisy all the time, all temps, all weather, all day, all driving conditions... I also seem to recall reading that Chevy discouraged dealers from selling the trans to customers due to the noise - didn't want customers who couldn't live with the characteristics - maybe was even a COPO (?) item (special order/approval only). Twern't called "rock crusher" fer nothin'. (BTW, "Rock Crusher" was the actual name Chevrolet used for the tranny). > I have a 66 Stingray with 327/350 engine and manual transmission. I drive it > every other week. When I start up, its hard to get it in gears and without > a little grinding. When it warms up with a some driving, all is fine. I > think tranny was rebuilt 12 years / 5000 miles ago. Any ideas? What tranny > oil is good to change it too? Here's waving to ya - \|||| Owen ___ '67BB & '72BB ___ "To know the world intimately is the beginning of caring." -- Ann Hayman Zwinger |
#9
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"Barking Rats" > wrote in message news > In article >, > ZombyWoof > wrote: > >> Isn't this the Tranny that was lovingly referred to as the "Rock >> Crusher"? > > Yes, but if so, it's certainly not likely the original tranny. There > were only 15 installed in '66 (and I would wager they went into racing > Corvettes). For every year they were offered, they were always a > super-low quantity factory installed item. > > Additionally, the OP only mentioned grinding when starting cold - as I > understand the M-22, it was noisy all the time, all temps, all weather, > all day, all driving conditions... I also seem to recall reading that > Chevy discouraged dealers from selling the trans to customers due to the > noise - didn't want customers who couldn't live with the characteristics > - maybe was even a COPO (?) item (special order/approval only). Twern't > called "rock crusher" fer nothin'. (BTW, "Rock Crusher" was the actual > name Chevrolet used for the tranny). Knew a guy who had that trans in a '70 454 Chevelle SS. The thing absolutely howled. I liked hearing it on the street as he'd go through the gears up or down, but live with it every day? I dunno, but I guess it's nice to know you can miss a shift and not end up with a whole lot of neutral. AJM '93 Ruby coupe, 6 sp |
#10
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