Choose your color scheme:
The Vette Barn  
 
Go Back   The Vette Barn > Off Topic/Babes/Other > Off Topic

Off Topic Off Topic - General non-Corvette related discussion.

User Tag List

Reply
 
Share Thread Tools Search this Thread
Old 09-20-2022, 9:22pm   #1
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default Opinions on a C3

I ran across a 1976 model with 86k miles. All stock, no mods.
Paint is good, very minor bump to the nose (scuffs and some hairline spiderwebbing but no breaks or tears). Interior is really nice, needs a good cleaning and detailing. Only real bad spot is where the left speaker is. Perforated area has a chunk missing.
AC is cool but not cold. Windows work. Doors shut well.
Cons are small exhaust leak on passenger side, tach doesn't work, and the issue I am curious about: runs and drives out very well, but when first taking off there is a shudder feeling from the rear end for a few seconds, and when backing up it will make two or three popping sounds. Looks to be an axle seal leaking somewhat on the right side coming out of the differential. Not dripping, but one can tell it has a leak. Fluid level is good in the chunk. No noises or vibrations when driving, only when first pulling off from a dead stop.
Local shop says likely spider gears and he can repair it for around $400/500. States it is a common issue. They have an '80 in now with the same issue. My concern is it may be worse, and I know that gets expensive.
Anyone have any experience with this?
BADRACR1 is offline   Reply With Quote
Old 09-20-2022, 9:34pm   #2
outrunm
Barn Stall Owner #111
Points: 9,474, Level: 67
Activity: 15.0%
 
outrunm's Avatar
 
Join Date: Oct 2015
Location: Tampa Bay
Posts: 2,646
Thanks: 968
Thanked 3,486 Times in 1,186 Posts
Gameroom Barn Bucks: $5547
Default

That Posi pop is common. I had to pull the one on my C3 and have it rebuilt as well. I noticed my issue on sharp turns.
That price quote is too cheap if you are dropping the car off. I pulled my diff out and took it to the guy.
outrunm is offline   Reply With Quote
The Following User Says Thank You to outrunm For This Useful Post:
Old 09-20-2022, 9:37pm   #3
Grey Ghost
A Real Barner
Points: 41,748, Level: 100
Activity: 58.7%
 
Grey Ghost's Avatar
 
Join Date: Feb 2011
Location: GA
Posts: 18,389
Thanks: 9,321
Thanked 6,588 Times in 2,924 Posts
Gameroom Barn Bucks: $46272
Default

May not have posi lube in the rear? They absolutely require it.

Not a tough job to pull axles and do it yourself. If you aren't into doing that is not a bad price, if you are in love with the car or can make coin on it.

I think if you do continuous circles in a empty parking lot for example and keep hearing the noise it may be the lack of posi lube.

The big thing with those cars are the soft bumpers. They deteriorate badly and the repros look like crap with panel lines.

Mechanical stuff is usually cheap or not too bad on Vettes. Cosmetics is where the money comes into play.
Grey Ghost is offline   Reply With Quote
The Following User Says Thank You to Grey Ghost For This Useful Post:
Old 09-20-2022, 9:51pm   #4
ZipZap
Barn Stall Owner #55
Island14 Cardio Team
Points: 40,509, Level: 100
Activity: 21.8%
 
ZipZap's Avatar
 
Join Date: Jan 2011
Posts: 10,529
Thanks: 2,763
Thanked 6,415 Times in 2,958 Posts
Gameroom Barn Bucks: $23236
Default

C4 - 1

j/k, C3's with the receeding rear window are one of my favorites.
ZipZap is offline   Reply With Quote
The Following User Says Thank You to ZipZap For This Useful Post:
Old 09-20-2022, 10:17pm   #5
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by Grey Ghost View Post
May not have posi lube in the rear? They absolutely require it.

Not a tough job to pull axles and do it yourself. If you aren't into doing that is not a bad price, if you are in love with the car or can make coin on it.

I think if you do continuous circles in a empty parking lot for example and keep hearing the noise it may be the lack of posi lube.

The big thing with those cars are the soft bumpers. They deteriorate badly and the repros look like crap with panel lines.

Mechanical stuff is usually cheap or not too bad on Vettes. Cosmetics is where the money comes into play.
The shudder occurs when taking off straight, not just a circle. Popping two or three times backing up.

Front and rear covers aren't cracked or split anywhere. Some spiderwebbing across the nose in the paint.

You know me. End game here is to drive it a little while and sell it. I can get it pretty reasonable. As long as I don't have to put more than 2k or so in I should still get a couple of grand profit.
BADRACR1 is offline   Reply With Quote
The Following 2 Users Say Thank You to BADRACR1 For This Useful Post:
Old 09-20-2022, 10:18pm   #6
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by ZipZap View Post
C4 - 1

j/k, C3's with the receeding rear window are one of my favorites.
Oh, I still have the '94 vert. It ain't going any time soon.
BADRACR1 is offline   Reply With Quote
Old 09-20-2022, 10:23pm   #7
Big bob
Vette Barn Crew
Points: 678, Level: 13
Activity: 44.1%
 
Big bob's Avatar
 
Join Date: Sep 2022
Posts: 186
Thanks: 82
Thanked 82 Times in 46 Posts
Gameroom Barn Bucks: $500
Default

Might be the axle u joints.
Big bob is offline   Reply With Quote
The Following User Says Thank You to Big bob For This Useful Post:
Old 09-20-2022, 10:26pm   #8
Grey Ghost
A Real Barner
Points: 41,748, Level: 100
Activity: 58.7%
 
Grey Ghost's Avatar
 
Join Date: Feb 2011
Location: GA
Posts: 18,389
Thanks: 9,321
Thanked 6,588 Times in 2,924 Posts
Gameroom Barn Bucks: $46272
Default

from google

"A "clunk" in the rear when putting in gear can be a few things. First would be the front differential mount bushing. It is a rubber/steel mount that holds the front of the diff. to the chassis.
When the rubber deteriorates, it allows the diff. to flip up/down, as you put it in gear, or even sometimes when you first take off, or slow down(on-off the gas quickly). They are replacable fairly easily.


Second, you could have u-joints in the driveshaft, or either/both of the half shafts worn/damaged, that could cause a clunk noise. (There is also a possibility of the half shaft flanges being loose on the stub shafts. This is not a common issue, and doubtfull that it is your noise...just info for you.)

Finally, you could have wear in the ring/pinion gears in the differential. This usually manifests itself as a growling, or whine noise while driving, but can also make a clunking noise, depending on what may actually be worn."

I think if you could put it on a lift or jack stands and rotate the wheels to see if you hear exactly where the sound is coming from before having the shop tear into rear pumpkin
Grey Ghost is offline   Reply With Quote
The Following 2 Users Say Thank You to Grey Ghost For This Useful Post:
Old 09-20-2022, 10:27pm   #9
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by outrunm View Post
That Posi pop is common. I had to pull the one on my C3 and have it rebuilt as well. I noticed my issue on sharp turns.
That price quote is too cheap if you are dropping the car off. I pulled my diff out and took it to the guy.
How long ago? More than spider gears involved?
I am going to make a couple of calls tomorrow and get prices from a couple of friends who have shops on a rebuild.
BADRACR1 is offline   Reply With Quote
Old 09-20-2022, 10:42pm   #10
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by Grey Ghost View Post
from google

"A "clunk" in the rear when putting in gear can be a few things. First would be the front differential mount bushing. It is a rubber/steel mount that holds the front of the diff. to the chassis.
When the rubber deteriorates, it allows the diff. to flip up/down, as you put it in gear, or even sometimes when you first take off, or slow down(on-off the gas quickly). They are replacable fairly easily.


Second, you could have u-joints in the driveshaft, or either/both of the half shafts worn/damaged, that could cause a clunk noise. (There is also a possibility of the half shaft flanges being loose on the stub shafts. This is not a common issue, and doubtfull that it is your noise...just info for you.)

Finally, you could have wear in the ring/pinion gears in the differential. This usually manifests itself as a growling, or whine noise while driving, but can also make a clunking noise, depending on what may actually be worn."

I think if you could put it on a lift or jack stands and rotate the wheels to see if you hear exactly where the sound is coming from before having the shop tear into rear pumpkin
No noise going into forward or reverse. Only when pulling off from a stop. Sort of a shudder and slight popping. I suspect pinion.
BADRACR1 is offline   Reply With Quote
Old 09-20-2022, 10:48pm   #11
Big bob
Vette Barn Crew
Points: 678, Level: 13
Activity: 44.1%
 
Big bob's Avatar
 
Join Date: Sep 2022
Posts: 186
Thanks: 82
Thanked 82 Times in 46 Posts
Gameroom Barn Bucks: $500
Default

My money is on u joints pick it up and wiggle it.
Big bob is offline   Reply With Quote
The Following 2 Users Say Thank You to Big bob For This Useful Post:
Old 09-20-2022, 10:52pm   #12
ratflinger
Barn Stall Owner #THX1138
Points: 12,465, Level: 77
Activity: 18.5%
 
ratflinger's Avatar
 
Join Date: May 2011
Location: South of SA
Posts: 2,119
Thanks: 773
Thanked 1,744 Times in 785 Posts
Gameroom Barn Bucks: $1322
Default

Spider gears my ass, about the last thing to fail. Soft faced axle shafts are probably shot. Anybody quoting you less than about $1500 for a rebuilt diff is lying their ass off and even then most of them are screwing you. Parts for a full rebuild will be about $500 & the rest is labor, unless you want a real shit job. Posi case needs polished and checked for cracks, posi unit needs replaced and tuned, and not with that spring loaded POS.


Now it could be all the other things people have mentioned, but no one goes into the diff for $400 - $500.
ratflinger is offline   Reply With Quote
The Following 4 Users Say Thank You to ratflinger For This Useful Post:
Old 09-20-2022, 11:03pm   #13
Grey Ghost
A Real Barner
Points: 41,748, Level: 100
Activity: 58.7%
 
Grey Ghost's Avatar
 
Join Date: Feb 2011
Location: GA
Posts: 18,389
Thanks: 9,321
Thanked 6,588 Times in 2,924 Posts
Gameroom Barn Bucks: $46272
Default

Quote:
Originally Posted by ratflinger View Post
Spider gears my ass, about the last thing to fail. Soft faced axle shafts are probably shot. Anybody quoting you less than about $1500 for a rebuilt diff is lying their ass off and even then most of them are screwing you. Parts for a full rebuild will be about $500 & the rest is labor, unless you want a real shit job. Posi case needs polished and checked for cracks, posi unit needs replaced and tuned, and not with that spring loaded POS.


Now it could be all the other things people have mentioned, but no one goes into the diff for $400 - $500.
We had a local radiator repair shop here for decades. I asked someone one time if the guy was good or not. His reply, 'he sells a lot of new radiators'. He kind of lured people in with a clean, boil out, resolder, etc...for around $75 on his sign (back in the day). But, the news was ALWAYS...can't fix it. You need a new one and i just happen to have one. It was probably true that they just needed to buy a new one. But, he made good labor and parts money luring people in thinking they would be out the door for only $75.

I wouldn't call anyone or say anything until I bought the car and found out for sure where the sound was coming from. Don't put it in their mind you want gears up front.
Grey Ghost is offline   Reply With Quote
The Following 2 Users Say Thank You to Grey Ghost For This Useful Post:
Old 09-21-2022, 5:01am   #14
StaticCling
A Real Barner
Points: 34,906, Level: 100
Activity: 8.1%
 
StaticCling's Avatar
 
Join Date: Jun 2013
Location: I stick like glue
Posts: 8,982
Thanks: 2,583
Thanked 5,809 Times in 2,354 Posts
Gameroom Barn Bucks: $46509956
Default

Shudder *could* be a busted tail shaft on the transmission, or it isn't properly secured to the mount. I had this on my '73, and discovered it when I pulled the engine/trans. Tach was electronic after '75.
StaticCling is offline   Reply With Quote
The Following User Says Thank You to StaticCling For This Useful Post:
Old 09-21-2022, 5:31am   #15
Frankie the Fink
Vette Barn Crew
Points: 1,103, Level: 19
Activity: 51.2%
 
Frankie the Fink's Avatar
 
Join Date: Jul 2022
Posts: 370
Thanks: 73
Thanked 453 Times in 162 Posts
Gameroom Barn Bucks: $500
Default

Don't own one but friends tell me working on the dash components is worse even than the C2, so be aware. Windshield wiper system iand headlights can be a mother too. If the C3s have a "subber bushing" at the front differential mount it can cause a clunk, otherwise its internal. My issue with the C3 is that I graduated in '69 and they were EVERYwhere. I just got jaded with the look and I still am..
Frankie the Fink is offline   Reply With Quote
The Following User Says Thank You to Frankie the Fink For This Useful Post:
Old 09-21-2022, 6:54am   #16
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by Frankie the Fink View Post
Don't own one but friends tell me working on the dash components is worse even than the C2, so be aware. Windshield wiper system iand headlights can be a mother too. If the C3s have a "subber bushing" at the front differential mount it can cause a clunk, otherwise its internal. My issue with the C3 is that I graduated in '6p and they were EVERYwhere. I just got jaded with the look and I still am..
Lights and wipers work fine
BADRACR1 is offline   Reply With Quote
Old 09-21-2022, 6:55am   #17
BADRACR1
Barn Stall Owner #5150
Bantayan Kids '17
Points: 35,768, Level: 100
Activity: 12.9%
 
BADRACR1's Avatar
 
Join Date: Jan 2011
Location: East Ridge TN
Posts: 17,280
Thanks: 11,346
Thanked 3,585 Times in 1,373 Posts
Gameroom Barn Bucks: $2000032332
Default

Quote:
Originally Posted by Big bob View Post
My money is on u joints pick it up and wiggle it.
They all appear tight, no play on driveshaft or axle shafts.
BADRACR1 is offline   Reply With Quote
Old 09-21-2022, 6:59am   #18
Big bob
Vette Barn Crew
Points: 678, Level: 13
Activity: 44.1%
 
Big bob's Avatar
 
Join Date: Sep 2022
Posts: 186
Thanks: 82
Thanked 82 Times in 46 Posts
Gameroom Barn Bucks: $500
Default

How much play from the axle to the drive shaft? Can you grease them? Can you tell if they are dry? Have you replaced the reared fluid? There was a camber problem with that year as well.

Stick or auto?

And what did the rubber mount look like that the Ghost told you about?
Big bob is offline   Reply With Quote
Old 09-21-2022, 7:26am   #19
Big bob
Vette Barn Crew
Points: 678, Level: 13
Activity: 44.1%
 
Big bob's Avatar
 
Join Date: Sep 2022
Posts: 186
Thanks: 82
Thanked 82 Times in 46 Posts
Gameroom Barn Bucks: $500
Default

https://www.corvetteactioncenter.com...ation-708.html

I knew I remembered something about this found it now see if I can post it.
Big bob is offline   Reply With Quote
The Following User Says Thank You to Big bob For This Useful Post:
Old 09-21-2022, 7:54am   #20
Touringmike
Barn Stall Owner #115
Points: 14,940, Level: 84
Activity: 37.0%
 
Touringmike's Avatar
 
Join Date: Dec 2011
Location: Sussex, Wi
Posts: 3,408
Thanks: 771
Thanked 2,082 Times in 1,020 Posts
Gameroom Barn Bucks: $610854
Default

Quote:
Originally Posted by BADRACR1 View Post
You know me. End game here is to drive it a little while and sell it. I can get it pretty reasonable. As long as I don't have to put more than 2k or so in I should still get a couple of grand profit.
I recently started work on a '76, manual, 76k miles, no air (or heat for that matter-heater core delete when engine replaced).
My observations so far:

Automatic's are quite reasonable in price vs manuals.~$3k min more around here for 4spds).
Harder to sell at higher prices ($8-15k prices for nice drivers. I see the a lot of the same cars still for sale since May this year).

I'm guessing you're looking at a dirt cheap price on this unit to realize your potential profit . You'll be surprised how quick you hit the $5-7K mark in parts and paint (not a trailer queen paint job) alone.
Sounds like major $$ issue in the drive line to me. I saw a Local Marketplace ad for a C3 rear diff. for sale in the $1.5k range.
I purchased a slightly used dual exhaust for $250.00. Spent $50.00 on brackets and such to mount it. Stuff ads up quickly.
Touringmike is offline   Reply With Quote
The Following User Says Thank You to Touringmike For This Useful Post:
Reply

The Vette Barn > Off Topic/Babes/Other > Off Topic


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 2:06pm.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.
Copyright 2009 - 2022 The Vette Barn


Support the Barn:
 
Download the Mobile App;
 
Follow us on Facebook:

Become a Stall Owner

 

Apple iOS App        Google Android App

 

Visit our Facebook page