Author Topic: 9N661286 Muncie M21 Main Case (Damaged)  (Read 927 times)

ZLP955

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9N661286 Muncie M21 Main Case (Damaged)
« on: May 17, 2020, 12:36:44 AM »
Muncie M21 main case (with damage) for sale on ebay.
Main Case: 3925660
Partial VIN: 19N661286
Assembly Stamp: P9C05B
Possible VINs: 124379N661286 or 124679N661286
Auction URL: https://www.ebay.com/itm/1969-69-Camaro-M21-Muncie-4-Speed-Trans-Main-Case-Z28-SS-B-Code-READ-NEEDS-WORK/303565722530
Seller ID: harleyjim
Item Location: Webster, NY, USA
Start Bid: US$99.99
Seller's Description:
Quote
used original Muncie M21 close ratio 4 speed main case with a 1969 Camaro VIN. THIS NEEDS WORK. 1 mounting ear is cracked and it had a fitting on top. There is some internal damage that may be repairable by filing.
Tim in Australia.
'Fiasco' - 1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3 bumper, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA. Raced at Lions Dragstrip in Long Beach.

rszmjt

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #1 on: May 17, 2020, 12:57:54 AM »
Easy fix,  that’s for a mid June car, very early trans assembly date.

ZLP955

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Tim in Australia.
'Fiasco' - 1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3 bumper, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA. Raced at Lions Dragstrip in Long Beach.

bcmiller

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #3 on: May 28, 2020, 01:41:11 PM »
Easy fix,  that’s for a mid June car, very early trans assembly date.

Can be fixed but I am not sure the 3 issues would be called easy.

What do you mean by “very early trans assembly date”?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

ZLP955

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #4 on: May 29, 2020, 12:11:29 AM »
What do you mean by “very early trans assembly date”?
Presumably, early March trans in a mid-June car?
Tim in Australia.
'Fiasco' - 1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3 bumper, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA. Raced at Lions Dragstrip in Long Beach.

bcmiller

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #5 on: May 29, 2020, 12:53:18 AM »
What do you mean by “very early trans assembly date”?
Presumably, early March trans in a mid-June car?

Could be. But it is not unusual. SOME (not all) other cars around that VIN have similar trans assembly dates.  That case has been known for over 13 years.

Transmission dates can vary, sometimes by a lot more than you would think.  I have an M22 assembled late January 1969 that didn't go into a car until early August. 
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

rszmjt

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #6 on: May 30, 2020, 01:40:31 PM »
What do you mean by “very early trans assembly date”?
Presumably, early March trans in a mid-June car?

Could be. But it is not unusual. SOME (not all) other cars around that VIN have similar trans assembly dates.  That case has been known for over 13 years.

Transmission dates can vary, sometimes by a lot more than you would think.  I have an M22 assembled late January 1969 that didn't go into a car until early August. 

M22 is a different deal only approximately 2000 cars, no where near as many used in 69 as the M21
The EBay case is approx 2000 cars after my own Z, and the trans assembly date is almost 2 months earlier . Mine is P9D28. I’ve been keeping watch on June cars for years, most have May dates.

rszmjt

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #7 on: May 30, 2020, 01:46:04 PM »
Easy fix,  that’s for a mid June car, very early trans assembly date.

Can be fixed but I am not sure the 3 issues would be called easy.



What do you mean by “very early trans assembly date”?

Maybe not for some but actually not that hard to do. I’ve fixed lots worse cases, the tapped hole on top and cracked ear can easily be tig welded up, then rolloxed off and shot peened or tumbled to refinish. The thrust is probably OK, I’ve seen lots of cases chewed up around where the bearing support plate goes, this is usually caused by exploding either the counter gear or 1st gear.

bcmiller

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #8 on: May 30, 2020, 06:22:23 PM »
What do you mean by “very early trans assembly date”?
Presumably, early March trans in a mid-June car?

Could be. But it is not unusual. SOME (not all) other cars around that VIN have similar trans assembly dates.  That case has been known for over 13 years.

Transmission dates can vary, sometimes by a lot more than you would think.  I have an M22 assembled late January 1969 that didn't go into a car until early August. 

M22 is a different deal only approximately 2000 cars, no where near as many used in 69 as the M21
The EBay case is approx 2000 cars after my own Z, and the trans assembly date is almost 2 months earlier . Mine is P9D28. I’ve been keeping watch on June cars for years, most have May dates.

They didn’t build M22s if they didn’t need them. I am actually quite aware of the production numbers.

2117 M22s in 69 Camaros. 1276 in Chevelles.

Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

DONCZ28

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #9 on: June 20, 2020, 02:06:23 PM »
I purchased this case for my 69 -z  661208 vin,   mid june car , currently  has 68  m-20  trans.

rszmjt

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #10 on: June 20, 2020, 02:46:39 PM »
DONCZ28,
The case in this post is super close to you car, good deal for you short of finding your original.
Your car is very close to my Z, approx 1900 cars later. My trans is P9D28, if I can help with anything related shoot me a message.

Mike

bcmiller

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #11 on: June 20, 2020, 02:55:49 PM »
I purchased this case for my 69 -z  661208 vin,   mid june car , currently  has 68  m-20  trans.

Nice. Is the 68 Muncie you have from a Camaro? If so what is the partial VIN?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

DONCZ28

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Re: 9N661286 Muncie M21 Main Case (Damaged)
« Reply #12 on: July 02, 2020, 03:30:00 AM »
My 68  trans. M-20  P8T19  vin  18N 37xxxx    I heard my original trans was blown a part.......Don

 

anything