Limited Slip differentials are preferred in Performance cars because as the name implies they allow Limited Slip. Reason being is that it mixes better with water rather than letting water sit outside next to metal causing rust. We as the consumer would know what is acceptable rather then just having to take the answer that synthetics are not recommended and wondering why. How do I tell what size ring gear I have in my diffs to know the fluid capacity for my 1500. Remember, on a rear end without a drain plug allways remove the fill plug first. For the front diff, which is open, it doesn't matter.
Backlash is the amount of play the ring gear can move before the pinion moves. Most of time we run majority of dyno runs on regualr oil and only swap for last few pulls to get rpm baselines and to check what reduced timing does and such. Then when you first drive it again, the clutches are working dry until enough lube works its way back up there to relube the clutches. If the rear differential noise is characterized by clunking every two or three feet, then there is a great chance that a broken ring gear is the problem with the section with the broken teeth banging or grinding as it tries to engage the pinion. The bolt length has not been consistent either.
Add oil to the differential until oil starts dripping out of the axle oil fill hole. You need thicker dyno oils to protect heavy loads, but wont work in high altitude or super cold temps. Cars use a Limited Slip differential which is designed to engage and slip, it never fully locks up. Hi Bob, With all the humor I can muster up in an Internet post, I say. Same as the wheel bearings at each rear wheel. Honestly, if you are mechanically inclined you can grab yourself a gasket and your specified differential fluid at your local autoparts store.
Have never seen gear oil gushing out my filler cap yet. Clunking and banging noises on the corners can be due to lack of sufficient posi-traction lubrication, broken spider gears, or worn posi-traction or limited-slip clutches. To get the rear set up properly, you will need some tools — specifically, a and some. A liter is just a touch more than a pint. Remember up until the advent of using petroleum products whale oil was preferred lubricant. On this swap, we did this about 15 times, for various reasons. The differential carrier holds the ring gear and connects the pinion gear to the rear axles.
There are only two ways to solve it eliminate chatter and they both require a lot of work if the oil is not doing the trick. Notice: Eaton locking differentials used in 10. Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. In situations like this, the wheel on the turning side inside wheel rotates slower than its counterpart outside wheel. Since the 1999 Model year the factory fill for the rear axle of all trucks has been 75W-90 Synthetic Gear Lube.
Now some say that synthetics are too thin and provide less shock loading over a thicker dino oil. Edited October 18, 2016 by Cowpie Most commercial trucks run full synthetic in the transmission and rear axles. Axles are measured in both length and spline count. I change mine twice a year due to this. That would be your best bet since it is easy to get and if you think about it cost isn't all that bad.
I have about 32,000 miles on my 2011 Silverado 3. Drain and refill the rear differential fluid using the procedure listed below. If you are not sure about the torque feelÂ, use a torque wrench on the drain plug in order to get a good feelÂ for what it should be, then do your best to apply that same feelÂ to the fill plug using your regular socket wrench. So I'm still curious why the Eaton engineers say they don't recommend synthetic oils? My unprofessional opinion would be this-Allowing the customer to find the happy medium while still honoring a warranty would not be cost effective for the manufacturer. Ron, The problem is that the term synthetic is vague. I really do appreciate the post, detailed information and good pictures.
These images show how to measure the bolt length. Ron, It sounds like you have answered some of your own questions. Menu Reviews For suggestions or comments please contact Or Visit. If you opt for this method keep in mind the oil will drain rapidly should you completely remove the plug. I have noticed what sounds to be clutch pack in the rear diff a slight no and want to frain and install new oil. Since you are experiencing noise it might not be that bad of an idea to pull the cover and look for any excessive wear, and check the magnet in the cover for shavings.
After 25 mph is will not lock. If you use synthetics, pay attention. All the fun in owning a truck is getting oily and greasy! I might check the service manual on this. The stuff I posted dosnt and it's available at my local autozone. I am planning on changing the Differential Oil, front and rear. It is better to unscrew the plug and hold it in place to slow the drain rate. My last truck had the same statement in the owners manual, and as soon as I changed fluid the diff started chattering feels like two blocks of rubber slipping past one another.