answers post under drivetrain, thats why i put it in general.

if you can move my post can you answer my question.

 

whats the question?

 

about what the differential temp should be after 30 mins of easy driving... like after 30 mins i cant even touch my diff... well i can but not for long.

 

im not trying to be a jerk but have you checked the diff fluid recently? how long have u had 4.10s?

 

It was moved to "Drivetrain" because that is where it was supposed to be posted. You got an answer on "Drivetrain" that was a very good explanation of why you probably wouldn't get a response.

I can move posts, but that does not mean I have the technical capability to answer them. I've got temp sensors on my vehicle, in places that many people don't, but I have never measured the diff lube temperature, and in 13 years of owning the car, I have never felt the diff after operation to see if it is hot. Logically, a large portion of the drivetrain power losses occur in the diff. For a GM 10- or 12-bolt, its about 7% of the flywheel HP that is converted in the diff from mechanical power to heat. That would tend to heat the lubricant up.

I'll leave it here, and let's see what happens.

Here is your original post:

 

Get one of these: http://www.ioportracing.com/Merchant...gory_Code=PYRO or a simple oven thermometer and measure the temps.
Synthetic diff. lub. is good for 230*+ temps. With 4:10's after 30min. I would think temps. in the range of 180* to 190* would be normal.
Ask the road racing guys. If you want more info.

 

Yea this car is my daily and i was a little concerned because i cant have a car with a blown up rear end, i cant afford the time and the money it would take to fix it.

 

It's going to get hot to the touch under normal operation. Unless it's actually burning the diff fluid, i wouldn't worry about it.

My question is, what lead you to think to check that? Is there a problem already with it, or was it sheer curiousity?

 

should never be so hot you can't touch it after 30 minutes.

then again if its not broke or making noise then I wouldn't worry about it

 

yea its hot to the touch, but it doesnt make any noise other than a slight whine but i figure its from the 4:10's


oh and it was just curiousity

 

Put a pan in the oven and heat it to 180* then take it out and hold it with your bare hands. Your engine should be around 160*-190*. How long can you hold the radiator hose?

 

see thats why i was asking, i didnt know it was supposed to get to 180.

 

Why not do this to ease your mind that it may be running too warm etc:

Replace the fluid, and add a bottle of GM rear additive. - should hold almost exactly 2 quarts.