rear end type (tech questionable)
Thread Starter
Instructor
Joined: Apr 2003
Posts: 144
Likes: 0
From: Neenah WI
rear end type (tech questionable)
First of all not sure if this should be in the tech section or not, so Moderators help me out. 
Last week everyone helped me figure out that my clutches in the rear were worn out. So after calling about 10 different places and finding only 2 that were formiliar I now have another question for the forum
One guy asked me if I had the Trac Lock or Power Lock set up?
I didn't notice anything in the book that said either of these. I have a 69 vert, 4 speed(norm), 350-350 (now 383). Was there only one system this year or how can I tell what system should be in there. To my knowledge no rear work has been done. 75k miles on it.
Last week everyone helped me figure out that my clutches in the rear were worn out. So after calling about 10 different places and finding only 2 that were formiliar I now have another question for the forum
One guy asked me if I had the Trac Lock or Power Lock set up?
I didn't notice anything in the book that said either of these. I have a 69 vert, 4 speed(norm), 350-350 (now 383). Was there only one system this year or how can I tell what system should be in there. To my knowledge no rear work has been done. 75k miles on it.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
You have a Eaton Limited Slip (GM-speak for Positraciton). The people you are dealing with are imbiciles. Traction Loc is a Ford limited slip.
Do yourself a favor and go to Tom's Differentials or Van Steel since they are 'Vette specialists.
Do yourself a favor and go to Tom's Differentials or Van Steel since they are 'Vette specialists.
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
[QUOTE=gerry72] The people you are dealing with are imbiciles. Traction Loc is a Ford limited slip.
I have to agree with you Gerry
69 - what makes you think the clutches are gone? If no one has been in there you have the solid steel clutches which are the best ones for a Eaton to use. The spider gears are 10-18's which I would replace with 10-17's for added strength.To use a well worn out expression, Corvette rear ends aren't exactly rocket science. They do require ability to work within a few thousands of an inch but any good driveline shop "Should" be able to handle it. There are some mods that can be done to them that a shop may or may not know of. Of course they're going to charge a lot more to do them too.
If you're capabable of removing the rear end, I can wlk you through a good inspection of it. Also do a search, my paper should still be here on rebuilding them.
Good luck,
Gary
I have to agree with you Gerry 69 - what makes you think the clutches are gone? If no one has been in there you have the solid steel clutches which are the best ones for a Eaton to use. The spider gears are 10-18's which I would replace with 10-17's for added strength.To use a well worn out expression, Corvette rear ends aren't exactly rocket science. They do require ability to work within a few thousands of an inch but any good driveline shop "Should" be able to handle it. There are some mods that can be done to them that a shop may or may not know of. Of course they're going to charge a lot more to do them too.
If you're capabable of removing the rear end, I can wlk you through a good inspection of it. Also do a search, my paper should still be here on rebuilding them.
Good luck,
Gary
Thread Starter
Instructor
Joined: Apr 2003
Posts: 144
Likes: 0
From: Neenah WI
gtr1999, I put out a thread a week or two ago inquiring about getting better traction with a limited slip. You were even referenced in the reply's as an inquiry if you still rebuilt rear ends.
http://forums.corvetteforum.com/show...229&forum_id=3
Or under tech it was titled as 'traction from Limited Streat/road course'
I did just go out and put up only the driver side and I can pretty easaly rotate the drivers side tire around.
From the manual it shows only the 'positronic' option for the rear end with a L-46 motor and 3.36 rear gears with the 4 spead.
I also was informed by another car friend that the vettes came with a Dana rear end. Now I am getting confused
I am also disappointed
with the local area shops, as none of them seem to know about this rear end and are having issues finding the clutch kits or rebuild kits.
gtr1999, I will look for your article and read it over tonight.
Thanks. I look forward to learning more on this.
http://forums.corvetteforum.com/show...229&forum_id=3
Or under tech it was titled as 'traction from Limited Streat/road course'
I did just go out and put up only the driver side and I can pretty easaly rotate the drivers side tire around.
From the manual it shows only the 'positronic' option for the rear end with a L-46 motor and 3.36 rear gears with the 4 spead.
I also was informed by another car friend that the vettes came with a Dana rear end. Now I am getting confused
I am also disappointed
with the local area shops, as none of them seem to know about this rear end and are having issues finding the clutch kits or rebuild kits.gtr1999, I will look for your article and read it over tonight.
Thanks. I look forward to learning more on this.
Drifting
Joined: Oct 2004
Posts: 1,259
Likes: 7
From: Ontario
gtr1999 is the man for this. If I were in your shoes I would just fast ship it to Gary and ask him go through it for you. That way it will be done once and correctly. Norval and I redid my diff with Gary's remote help last winter. We used his approaches to dial it in along with the elimation of the clutch springs and crush sleeve. Works better than ever...it is so quiet and locks up both wheels real good.
Last edited by Retro78; Jul 5, 2005 at 11:15 PM.
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Thanks for the support Doug 
Neil, send me your email address and I'll send you my paper. I don't know why it can't be found here anymore? The '63 and '64 vettes used a Dana that wasn't too good. The '65-'79 vettes used the Eaton which is better. As Doug said, there are ways to prep it that most shops won't do because of the added time and cost. It all comes down to how much you want to spend to get the best job.I'll be gald to help you out with your questions.
Gary
Neil, send me your email address and I'll send you my paper. I don't know why it can't be found here anymore? The '63 and '64 vettes used a Dana that wasn't too good. The '65-'79 vettes used the Eaton which is better. As Doug said, there are ways to prep it that most shops won't do because of the added time and cost. It all comes down to how much you want to spend to get the best job.I'll be gald to help you out with your questions.
Gary
Premium Supporting Vendor
Joined: May 2000
Posts: 4,312
Likes: 70
From: Clearwater FL
Originally Posted by 69Sting
I also was informed by another car friend that the vettes came with a Dana rear end. Now I am getting confused
I am also disappointed with the local area shops, as none of them seem to know about this rear end and are having issues finding the clutch kits or rebuild kits.
gtr1999, I will look for your article and read it over tonight.
Thanks. I look forward to learning more on this.
I am also disappointed
with the local area shops, as none of them seem to know about this rear end and are having issues finding the clutch kits or rebuild kits.gtr1999, I will look for your article and read it over tonight.
Thanks. I look forward to learning more on this.
Gary's paper very good. Very detailed.
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