Check out my Diff!
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 836
Likes: 0
From: Lake Norman NC
Check out my Diff!
Ok Diff has always had a very slow leak. I had the Tranny & Diff. Fluid changed to Redline products in early Feb. before I knew how easy it would be to do myself. I had a guy at a local place who said he had 2 seperate corvettes and knew how to work on them change the fluid for me. Well I have a diff that leaks about 20 drips a day rather than 2 or 3 and I wanted to check to make sure the fluid hadn't dropped too low!
Correct me if I'm wrong but the plug with the tab on it is the fill one correct???
No how in the $%*& did he over fill the diff. this much??
Sorry for the large pics... Photobucket was having problems for some reason!
Correct me if I'm wrong but the plug with the tab on it is the fill one correct???
No how in the $%*& did he over fill the diff. this much??
Sorry for the large pics... Photobucket was having problems for some reason!
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Can't see the photo's. Did you check it hot? It expands and builds pressure when hot, and he likely filled it cold. That may the reason for the oil spill you got when you removed the plug.
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Originally Posted by vettenuts
Can't see the photo's. Did you check it hot? It expands and builds pressure when hot, and he likely filled it cold. That may the reason for the oil spill you got when you removed the plug.
Ed
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 836
Likes: 0
From: Lake Norman NC
I guess Photobucket finally shrank the pictures.
The Diff was filled when it was hot, but the fluid he put in it was not of course. I did check the fluid about an hour after I got home since it was still light out. It wasn't hot enough to burn you but it was warm.
I would say I lost at least a quart and it was still coming out slowly when I put the plug back in.
Should I be worried that I don't have enought fluid in there anymore??? Does the fluid expand that much when it is warm???
The Diff was filled when it was hot, but the fluid he put in it was not of course. I did check the fluid about an hour after I got home since it was still light out. It wasn't hot enough to burn you but it was warm.
I would say I lost at least a quart and it was still coming out slowly when I put the plug back in.
Should I be worried that I don't have enought fluid in there anymore??? Does the fluid expand that much when it is warm???
Race Director
Joined: Mar 2001
Posts: 19,964
Likes: 6,768
From: Bonneville Salt Flats
If you really pulled the fill-plug and not the lower drain plug, it was definitely overfilled, no matter if it was originally filled hot or cold.
Clean it all up and see where your leak is really coming from.
All the best.
Clean it all up and see where your leak is really coming from.
All the best.
Pro
Joined: Nov 2003
Posts: 503
Likes: 1
From: Greensboro NC
Be sure your car is on level ground. Fluid should be level with the plug on the back that has the limited slip warning. An empty diff holds 2 qts. use synthetic redline and the gm limited slip additive be careful with the gm stuff – it ate the skin off of my fingertips.
Last edited by cjs27410; Sep 23, 2005 at 11:59 AM.
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Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 836
Likes: 0
From: Lake Norman NC
I removed the fill plug on the back of the diff not the drain plug on the very bottom of it.
I just think it was Grossly over filled.
I'm still amazed he was able to over fill it that much!
I just think it was Grossly over filled.
I'm still amazed he was able to over fill it that much!
Burning Brakes
Joined: Nov 1999
Posts: 901
Likes: 83
From: Los Angeles
I dont see how you can overfill it since the "full" line is the bottom of the fill hole itself. Just fill it until it weeps out and your good to go. If you keep putting more in it just keeps dripping out of the fill hole until it is level.
I just did this last night.
I just did this last night.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Agree with the others that if you removed the rear plug, not the one on the bottom, and your car was level, your diff shouldn't be over or under filled anymore. Level should be just below the fill plug.
Is it possible that he filled your diff nose down and was able to get more fluid in that way? I've never seen that much fluid come out just due to heat expansion.
The diff takes a synthetic 75w90, but does not require Redline specifically. Some diff fluids, such as the AMSOIL Severe Gear Extreme Pressure Synthetic 75w90 I use already have the limited slip friction modifier in them. I don't add the friction modifier to mine and have no issues with chatter. 
Is it possible that he filled your diff nose down and was able to get more fluid in that way? I've never seen that much fluid come out just due to heat expansion.
An empty diff holds 2 qts. use synthetic redline and the gm limited slip additive be careful with the gm stuff – it ate the skin off of my fingertips.
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