Quick question with a simple yes/no answer?
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,841
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From: Halifax, NS, Canada
Quick question with a simple yes/no answer?
Were there any '77 L82's built with a TH350 auto tranny? Any documentation I have says no but I had in my garage today an original L82 with its original owner and it has a TH350 tranny so whats the scoop???
Le Mans Master
Joined: Sep 2000
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From: Orlando Floriduh
Re: Quick question with a simple yes/no answer? (Binnie77)
There were 6,148 L82's made. The auto transmission option (M40) cost an additional $146 with the L82. The M21 4 speed required the L82 option and 2,060 were sold. That would leave the remaining L82's as automatics.
[Modified by silvervetteman, 7:45 PM 7/11/2002]
[Modified by silvervetteman, 7:45 PM 7/11/2002]
Melting Slicks
Joined: May 2001
Posts: 2,700
Likes: 3
From: Lebanon KY
Re: Quick question with a simple yes/no answer? (Binnie77)
Just checked in the BB, and it confirmed that the 350 tranny was available at an additional $146[Modified by corvettemaster, 7:49 PM 7/11/2002]
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,841
Likes: 3
From: Halifax, NS, Canada
Re: Quick question with a simple yes/no answer? (corvettemaster)
Just checked in the BB, and it confirmed that the 350 tranny was available at an additional $146[Modified by corvettemaster, 7:49 PM 7/11/2002]
Pro
Joined: May 1999
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From: Gabriola BC
Re: Quick question with a simple yes/no answer? (silvervetteman)
There were 6,148 L82's made. The auto transmission option (M40) cost an additional $146 with the L82. The M21 4 speed required the L82 option and 2,060 were sold. That would leave the remaining L82's as automatics.
There would have also been L-82's with M20's
bob
There would have also been L-82's with M20's
bob
Le Mans Master
Joined: Mar 2002
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From: Coming home from Luckenbach Texas
Re: Quick question with a simple yes/no answer? (Binnie77)
I don't think your answer is being questioned: you want to know if what ratio of TH400 vs. TH350 trannys were installed in '77. I don't know the answer, but knowing GM I would guess more than a few! At the time, they had a habit of grabbing whatever was available and sticking it in the car. That's why there are a few L48's with 4-bolt mains... :smash:
Safety Car
Joined: Feb 2002
Posts: 3,556
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From: Seattle WA
Re: Quick question with a simple yes/no answer? (Binnie77)
mine has th350. i dont know what else they would come with...
[edit] M20 apperntly. :D
[Modified by '79ProwlerOrange, 7:01 PM 7/11/2002]
[edit] M20 apperntly. :D
[Modified by '79ProwlerOrange, 7:01 PM 7/11/2002]
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Pro
Joined: May 1999
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From: Gabriola BC
Re: Quick question with a simple yes/no answer? (silvervetteman)
Just looked through my GM Data from GM Canada -- 77 Corvette
L-48 and L-82 could have RPO M20 which is a wide ratio BW
L-82 only could have RPO M21 which is a close ratio BW
L-48 auto was a 350 with a 2.52 low gear
L-82 auto was a 400 with a 2.48 low gear
The 350 in the L-82 must have been one of the assembley line swaps. It should also have had a drive shaft with a centre length of 29.81 inches instead of the standard L-82 shaft which is 29.50 inches.
L-48 and L-82 could have RPO M20 which is a wide ratio BW
L-82 only could have RPO M21 which is a close ratio BW
L-48 auto was a 350 with a 2.52 low gear
L-82 auto was a 400 with a 2.48 low gear
The 350 in the L-82 must have been one of the assembley line swaps. It should also have had a drive shaft with a centre length of 29.81 inches instead of the standard L-82 shaft which is 29.50 inches.
Le Mans Master
Joined: Sep 2000
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From: Orlando Floriduh
Re: Quick question with a simple yes/no answer? (tnt76vette)
OK ....lighten up :lol: :lol: I know there were mixed 350/400 transmissions between 75-77. Low performance engines of the era and cost were the main reasons GM switched to the TH350.. A friend of mine has an L82 77 that had a TH350. It seems that I remember reading somewhere that 75 was the last year for TH400's. That is a good question for the NCRS board. Manufacurer's do running changes, books are wrong, ( the 69 assembly manual shows an LT-1) I try to give the best answer I can and like everyone, Sometimes I get it wrong. Sorry...
Melting Slicks
Joined: Feb 2002
Posts: 2,625
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From: Cut n Shoot TX
Re: Quick question with a simple yes/no answer? (tnt76vette)
Must beg to differ with you Silvervetteman. My very early '76 has the TH-400 for sure......maybe I got the last one? :cheers: :cheers: :cheers:
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,841
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From: Halifax, NS, Canada
Re: Quick question with a simple yes/no answer? (Binnie77)
Well I guess this isn't a simple question after all. All of the documentation that I have from NCRS states that there were no L82's in '77 with the TH350. From '78 to '81 the TH350 was used exclusively according to their documenation.
Race Director
Joined: Mar 2001
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From: Living in the Hartland
Re: Quick question with a simple yes/no answer? (Binnie77)
This is very :cool: info. Now I can just take me car as is to any NCRS show and say well that was what came on the car, prove me wrong! Then referred to stuff like this. :lol:
Le Mans Master
Joined: Sep 2000
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From: Orlando Floriduh
Re: Quick question with a simple yes/no answer? (Fevre)
That's the fun part of this hobby... Researching and comparing. Even the NCRS guru's are not always in agreement. New stuff turns up all of the time. That is why well documented Corvettes are so sought after. A tank sticker or build sheet can enhance the value of your car and settle many unanswered questions. G/M's record keeping in the U.S. was very poor and they really weren't concerned about the owners 25 or 30 years later. They just wanted to go home after the day's work like we do.
[Modified by silvervetteman, 5:37 PM 7/12/2002]
[Modified by silvervetteman, 5:37 PM 7/12/2002]
Burning Brakes
Joined: Dec 1999
Posts: 1,188
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From: Saskatoon Saskatchewan Canada
Re: Quick question with a simple yes/no answer? (silvervetteman)
The "package" I received from GM Canada On both my 76 and my early build 77 shows on the back page under two colums headed by Turbo Hydra-matic
that the torque converter outside diameters were different with the L48 option vs the L82 as well as the stall ratio were differant. It also lists the front and rear bands on the L82 option were "circular steel with organic lining" the planetary gear ratios show 2.52:1 vs 2.48:1 as noted above. so there appears to be diferences. Anyone with george zappora's info can check it out on the back page. a quick look thru the registry linked below may also show something.:)
that the torque converter outside diameters were different with the L48 option vs the L82 as well as the stall ratio were differant. It also lists the front and rear bands on the L82 option were "circular steel with organic lining" the planetary gear ratios show 2.52:1 vs 2.48:1 as noted above. so there appears to be diferences. Anyone with george zappora's info can check it out on the back page. a quick look thru the registry linked below may also show something.:)
Drifting
Joined: Oct 2001
Posts: 1,699
Likes: 1
From: Westampton NJ
Re: Quick question with a simple yes/no answer? (Stevo)
And then the bastard clutch child chimes in...
I've got a '69 with original engine and transmission (L46 M20). I did a clutch replacement a few months ago and discovered the following:
Correct 14" flywheel bellhousing
"Correct" 14" flywheel, drilled for a 10.4" clutch (instead of the 11" clutch).
Now, if it were an early '69, I could see the small clutch/flywheel combo, due to it being used in the L46 from '68. But in '69, GM went to the larger diameter for the L46...
I guess they just didn't have any 11" clutches when my car was assembled...By the way, the clutch/pressure plate assembly and flywheel were the original factory installed parts.
I've got a '69 with original engine and transmission (L46 M20). I did a clutch replacement a few months ago and discovered the following:
Correct 14" flywheel bellhousing
"Correct" 14" flywheel, drilled for a 10.4" clutch (instead of the 11" clutch).
Now, if it were an early '69, I could see the small clutch/flywheel combo, due to it being used in the L46 from '68. But in '69, GM went to the larger diameter for the L46...
I guess they just didn't have any 11" clutches when my car was assembled...By the way, the clutch/pressure plate assembly and flywheel were the original factory installed parts.