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1978 and 1982 differences???

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Old Sep 27, 2007 | 11:30 PM
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Default 1978 and 1982 differences???

My Alldata program only goes back to 1982, I know 78-82 are basically the same. I've got a 78, what are the main differences from a 1978 to 1982?

Should all wiring/vacuum diagrams be the same? I don't care about the motor and trans, because I don't have the originals (in the car). Any MAJOR differences?
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Old Sep 28, 2007 | 12:43 AM
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I believe the nose and rear are different and in 82 they put in a crossfire injection and a little computor to run it, some 82 (the SE) the rear window was a hatch to ease access to the rear compartment
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Old Sep 28, 2007 | 04:48 AM
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Originally Posted by vetteguy112233
My Alldata program only goes back to 1982, I know 78-82 are basically the same. I've got a 78, what are the main differences from a 1978 to 1982?

Should all wiring/vacuum diagrams be the same? I don't care about the motor and trans, because I don't have the originals (in the car). Any MAJOR differences?
Due to the electronics, emission control devices disappear and that includes the hoses. It still has the vapor emission control devices and hoses as well as exhaust emission controls (cat converter).

Must weight saving efforts were made that can be seen with rear crossmember (alloy), rear monoleaf spring (non FE7), differential carrier.

Heavy looking nose with spoiler rearend.

More convenience options as base equipment like windows door locks, courtesy lights.
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Old Sep 28, 2007 | 08:14 AM
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78 Pace Cars and all 79-82 models got improved seats. California '80s had the Rochester E4ME computer-controlled carburetor, as did all '81s. '82 got the Cross-Fire injection system. '80-'82 had redesigned front and rear bumper covers. No manual transmissions were available in '82. The '82 CE had an opening rear hatch. '81s with the digital radio and all '82s had an oil temperature gauge instead of the clock.
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Old Sep 28, 2007 | 08:23 AM
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80-82's got lighter duty driveline parts from the front universal back as well. Not that they are made out of glass or anything, but something to consider if you are a weekend warrior, or want to show off at every stop light.
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Old Sep 28, 2007 | 09:12 AM
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Starting in 1980 the differential went from the 'iron' case to the Dana 36 or 44 if an L-82. The Dana 44 is definately the stronger unit, but drag racers prefer the old 'iron' unit. The old iron differential and Dana units do not interchange without extensive modifications. If you have an 80 up car you are racing, the Dana 44 would be the preferred unit.

In 82 the rear hatch glass was only offered in the CE model. The 82 model came with the 700R4 OD transmission. The other differences are already mentioned.
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Old Sep 28, 2007 | 01:22 PM
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The information on this forum astounds me
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Old Sep 28, 2007 | 02:19 PM
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Originally Posted by RockyL32
The information on this forum astounds me
Thats why dummies like me hang out here.
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Old Sep 28, 2007 | 02:22 PM
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Originally Posted by vetteguy112233
My Alldata program only goes back to 1982, I know 78-82 are basically the same. I've got a 78, what are the main differences from a 1978 to 1982?

Should all wiring/vacuum diagrams be the same? I don't care about the motor and trans, because I don't have the originals (in the car). Any MAJOR differences?
No, not the same but close on most. The reason is the '82 used the Cross Fire injection with two TBI on a crossram manifold. As such, there were parts to run this and wiring differences.

The rest of the car is pretty much the same.
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Old Sep 28, 2007 | 02:49 PM
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Another big difference is the 80-82 vettes have 45% improved air flow thru radiator due to front bumper/air dam design.....

Rich
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Old Sep 28, 2007 | 02:53 PM
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Wiring other than the engine will be similar, but the fuse box bulkhead arrangement will not be the same. As mentioned, the rear axle and suspension are different. Can't you get the Alldata info for like $20 a car?
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Old Sep 28, 2007 | 05:43 PM
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Makes a decent explanation of the differences between model years. So does The Corvette Black Book.

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Old Sep 28, 2007 | 10:39 PM
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My car is the L82, does this mean it's a Dana 44? How can I tell what is in it, just in case it's not the original housing. I've got 3.70 gears if that helps with anything.
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Old Sep 28, 2007 | 10:50 PM
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Originally Posted by vetteguy112233
My car is the L82, does this mean it's a Dana 44? How can I tell what is in it, just in case it's not the original housing. I've got 3.70 gears if that helps with anything.
No, the aluminum D44 was introduced in 1980.
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Old Sep 28, 2007 | 10:53 PM
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Originally Posted by Red 69
Starting in 1980 the differential went from the 'iron' case to the Dana 36 or 44 if an L-82. The Dana 44 is definately the stronger unit, but drag racers prefer the old 'iron' unit. The old iron differential and Dana units do not interchange without extensive modifications. If you have an 80 up car you are racing, the Dana 44 would be the preferred unit.
I'm pretty sure all 80-82 models had the aluminum D44. The D36 wasn't brought into the Corvette lineup until the C4 introduction.
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Old Sep 29, 2007 | 01:33 AM
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Originally Posted by I'm Batman
I'm pretty sure all 80-82 models had the aluminum D44. The D36 wasn't brought into the Corvette lineup until the C4 introduction.
I believe this to be true also, but Red 69 is correct that even the 'big' Dana-44 wasn't built to win the 'Stop-Light Nationals' drag-races.....
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Old Sep 29, 2007 | 05:39 AM
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Originally Posted by Glensgages
I believe this to be true also, but Red 69 is correct that even the 'big' Dana-44 wasn't built to win the 'Stop-Light Nationals' drag-races.....
The aluminum D44, unless it's set up just right, is known for not holding up. The earlier cast iron differential can be installed on the aluminum batwing, but I don't know the details. I think Van Steel might have been posting about it a few weeks back.
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To 1978 and 1982 differences???

Old Sep 29, 2007 | 07:47 AM
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I shouldn't post if I am not SURE of the answer, but I believe the potential for different vacuum routing exists because the vacuum canister is different on the 80-82 than it is on 78-79.
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Old Sep 29, 2007 | 11:33 AM
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Originally Posted by I'm Batman
I'm pretty sure all 80-82 models had the aluminum D44. The D36 wasn't brought into the Corvette lineup until the C4 introduction.
You are correct, thanks for clearing up my error.
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Old Oct 7, 2007 | 02:48 PM
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Originally Posted by I'm Batman
78 Pace Cars and all 79-82 models got improved seats. California '80s had the Rochester E4ME computer-controlled carburetor, as did all '81s. '82 got the Cross-Fire injection system. '80-'82 had redesigned front and rear bumper covers. No manual transmissions were available in '82. The '82 CE had an opening rear hatch. '81s with the digital radio and all '82s had an oil temperature gauge instead of the clock.
Hi Batman, are you sure about the oil temp gauge ? my 82 has a clock,
It's not a CE. Just curious, no offence intended.
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