A rear end of a car is the combination of the rear axle and differential gears located at the rear of the vehicle encased in either a cast-iron or aluminum housing. It converts the torque sent by the transmission, enabling the power transfer that drives the vehicle. Although Chevrolet has used different rear end models throughout its history, all can be visually identified. Casting codes can also be used to identify the manufacture date. Count the number of inspection cover bolts on the rear end housing.
The inspection cover is on the back of the housing, seen by looking forward under the license plate at the rear of the vehicle. It is a round cover, fastened with bolts, used to gain access to the differential gears. Identify the most common GM rear-end types.
Look at the shape of the inspection cover and the gasket. All Chevrolet rear ends can be identified by comparing the gasket shape to an identification chart similar to the one found on Drivetrain's differential identification page see References. Locate the GM manufactured rear-end casting date on the housing. It is located at the base of the housing, on a flat surface facing upwards. It consists of a letter and three numbers, i.Yamaha r15 top speed test
The first position, "A" represents the month of manufacture, in this case, January. The second and third positions represent the day of the month and the last position is the decade year. Month codes begin with "A" for January and end with "L" for December. This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. Step 1 Count the number of inspection cover bolts on the rear end housing.
Step 2 Identify the most common GM rear-end types. Step 3 Look at the shape of the inspection cover and the gasket. After that, GM instituted the "Corporate" rear end, a bolt rear end that integrated feartures of both the and bolt rear ends. Rear ends with measurement designations are named after the diameter of the ring gear, i. As Chevrolet used many different rear-end models throughout the years, casting codes vary in both location and translation.
Information given is for GM-manufactured rear ends. Other rear ends are still identified visually with the information given. References Drivetrain. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Sign In with Edmunds.
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Service Centers in. Browse Forums by:. What Edmunds Says Pros. Got a lease deal in hand? Give us the details and we'll tell you if it's a good one. Evaluate my deal. Do you have a lease expiring and got offered the chance to extend it for a month or more? Did you get a great deal? Meet your fellow owners in our Owners Clubs. April in Chevrolet. I have a noisy rear end on a 99 Tahoe. It makes noise when I turn to the Right but not when I turn Left.
It also makes noise when coming to a stop.But how exactly does the motion of the piston or crankshaft convert to the rotational motion of the wheels? The differential is the final end mechanism that enables the creation of torque in the crankshaft before it is distributed through the transmission, to the drive shaft, and then to the wheels. This part serves to transmit engine power to the wheels while also enabling them to have different rotation speeds. The pair of driving wheels in a vehicle does not rotate at the same speed during a turn.
In situations like this, the wheel on the turning side inside wheel rotates slower than its counterpart outside wheel. To put it simply, this mechanism is the one that decides the speed and the frequency of the turning of the axle and wheels in relation to the turning of the drive shaft.
This is often referred to ring and pinion ratio. If for example you have a rear gear ratio of 3. The differential doses the power to the two wheels at the exact proportions and speed to ensure that stability is kept to the maximum and strain on the drivetrain, differential components and tires is kept at a minimum. Two wheels on a drive axle without a differential in the middle would result in both wheels receiving the same power at all times.
Having a differential however, enables each wheel to act individually. Why should you care? Well this makes a world of a difference when turning. Simply put, the differential allows each wheel to be independent from the other while still sending power to both of them. When one wheel is spinning slower on a curb, the mechanism will keep driving the other wheel without any skidding, binding or jerking. It the differential would not be present, we would have wheels locked together at the same speed in a turn.
This would make turning difficult and with a high probability of losing control. Besides turning, other issues could arise from the drivetrain as it would be exposed to high forces.
What would happen is that one tire would need to grab and slip in order to maintain the same speed as the other one leading to the transmission of the force through the axle to all its components resulting in a huge strain on axle components and tires that leads to premature wear.
Rear differentials give out noticeable symptoms once they start wearing out or getting damaged. Usually once your differential goes bad you might experience any of the following:. The rear differential is made up of many gears with teeth entwined with each other.
The effectiveness of its function is dependent on how precise these gears are arranged and oriented relative to each other. If, for example, lubrication runs low on the mechanism or the arrangement of the gears goes out of place, rear differential noise occurs. Gear whine, bearing noise and clunking are common rear differential noises that should be a concern to vehicle owners.May 28, Chevrolet Cruze.
Experiencing a mystery noise from your car does not tend to reassure, and although it might be harmless, it is also plausible that it is a symptom of an important breakdown on approach. Noticing a noise coming from the rear end of your Chevrolet Cruze may signal a stopover at your mechanic sooner or later, like just a rock in the tread of a wheel. To help you determine the triggers, our team has produced this content which should help you to see more clearly. First, we will check out what the different noises and trouble connected with your Chevrolet Cruze rear end noise are, and second, what your solutions are if the trouble is not included in this list.
If you detect a loud noise on the rear end of your Chevrolet Cruze, it may be relating to your wheels. Indeed, the wheels can be at the source of this vibration. To verify this, take a look at look at the presence of your balancing seals on your rims.
Finally, it is also plausible that a deformed or pre-used tyre may have the same types of symptoms and triggers this rear end lound noise on your Chevrolet Cruze. The deformation of a tyre, following an impact for example, will cause it to stick poorly to the ground and therefore noise will appear.
Whatever the case, bear in mind to verify the tread and sidewall of your tires.Diagram based wiring harness taller bmw e90 espaol
Another possibility is that your exhaust pipe has a hole in it or a collar has become loose. Bear in mind to go under your Chevrolet Cruze while the engine is running and verify the sound of your exhaust pipe to identify possible exhaust gas leaks.
How to Identify a Chevy Rear End
If you know of a loud noise but the trigger is not present here, we encourage that you read this content about loud noise on Chevrolet Cruzewhich may give you more ideas. If you know a clicking noise on the rear axle of your Chevrolet Cruze, it is plausible that the suspension portion of your car may be damaged.
Indeed, when the steering unit of your car is activated, the damping unit of your car may be the trigger of the trouble. Indeed, it is not extraordinary for the shock absorber cup to be out of order or for the shock absorber bearings to be out of order.
Bear in mind to verify the condition of these two elements. For more details, see our article on suspension noise on Chevrolet Cruze. A squeaking noise in the rear end of your Chevrolet Cruze can also derive from precipitate wear of your bearings. Indeed, bearings have an essential role in the proper handling of the car while driving. When you turn strongly, at high or low speed and bring the direction to a stop, the pressure applied on the bearings is higher than if you turn slowly, it can generate sounds close to a creaking sound if they are worn.
Bear in mind to verify their condition. Feel free to read this content page on suspension noise on Chevrolet Cruze which will eventually give you other ideas to help you solve your trouble.Chevrolet Tahoe owners have reported 20 problems related to differential unit under the power train category.
The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet Tahoe based on all problems reported for the Tahoe. Metal shavings in front differential, mileage is See all problems of the Chevrolet Tahoe. This vehicle was purchased from mac haik Chevrolet in houston, TX. Only one key was provided during the vehicle purchase. The other key was promised in an "we owe you" statement, but never received. At some point in time, it is believed the 2nd key was used to access this vehicle at undisclosed location s and or time s in addition to onstar app access.
The vehicle began to make rubbing sounds when turning corners and losing a little power.Rear End Chirping noise
In JulyI noticed my vehicle seemed to shake when going over speed bumps in a manner inconsistent with the way it normally went over speed bumps most times after vehicle delivery.
In addition to, the engine seemed to be idling too high at no speed and in a manner inconsistent with the way it performed most times after vehicle delivery. Also, the dashboard is cracked around the airbag. In AugustI went back to the dealer for inspection of these problems. I was informed repairs were made to the front differential of the vehicle and the transmission was overfilled. I was provided a statement of the work, but I felt the verbal explanation for the work was too vague being my vehicle was in the shop for approx.
Read more Consumer states several issues with vehicle and request information on recalls, service bulletins, warranties or lemon law the consumer stated the cruise control down shifted to 2nd while driving at highway speeds and on hills, the starter would hang, there was a noise coming from the ac compressor.
The transmission was replaced. However, it continued to hesitate after the vehicle was started, as well as a vibration.
There was a clicking noise coming from the differential, the idle needle would rise, while at a stop, the battery drained, the engine stalled, the dash was cracked, there was a problem with the suspension, the tire pressure monitoring system was repaired three times, the passenger side mirror was inoperable, the weather strip had come off the vehicle and there was a clicking noise coming from the u-joint. Front differential started making a very loud noise.
It became even louder in 4-wheel drive. While in 4-wheel drive the vehicle didn't feel right. I brought to the dealer who stated water got into the differential, and it had to be rebuilt.
This is the 3rd time I have had an issue with the front differential. All 3 times, including this one, was due to the failure of the pinion seal.
I can only wonder how dangerous it was driving around in 4 wheel drive with a differential that was ready to catastrophically fail?.
I have a chevy Tahoe. I purchased the vehicle 2 years.There was a loud clunking noise in back of truck, sounded like something loose. Looked, could not locate it. Finally found the issue after about 3 weeks. The bolt was broken off pin that goes through a gear and kinda wore hole where pin goes through. Was able the get a new bolt through the pin to hold it in place.
Temporary fix. Kinda lost as to just get a used rear end or have rebuilt at cost of about dollars, which I do not have laying around.
My understanding is a common issue with this. Too bad GM will not take care of the issues on them if know about it and recall them to fix the issues. Can break cause major accident or death? I bought this and miles later, the rear end clunks. Getting louder and louder as time goes on.
There is no fix, they say this is normal. If I get into an accident because of this, I will sue Chevrolet. Bought this 07 chevy classic brand new, complained to dealer about a whining noise in rear end they said it was normal, 3 months later whining is louder.
This truck came from the dealer or manufacture with no rear end grease. Now i'm stuck with Sometimes after I come to a stop, about 2 or 3 seconds later it feels like someone bumped my rear bumper. I called the local chevy dealer and he said the slip joints are probably dry and need to be greased.
1999 Silverado possible rear end noise issue??
I think these are sealed bearings?? It's still under warranty so i will have them check it out, but from the sound of similar complaints, it appears they can't do anything about it. Besides all that, the truck runs, shifts, and brakes just as smooth as can be.Imap error code 0x80004005
Hope they come up with a fix for this. Bought the truck brand new.
At a few thousand miles began getting a clunk when stopped. Had the truck in to dealer 7 times in the last 5 years to have yoke serviced with high temp grease. Transmission had to be pulled and seals redone at 12, miles. Clunk and stabilitrak failure light came on at 82, miles, 5 months out of warranty. Now under 12 month 12, mile repair warranty on motor work. Own classic cars and fair mechanic, always ran mobil one in it after break in and service3d it didn't want to tackle the 5.
I have the same complaint, feels like being rear ended, loud clunk, etc. I did some research, and found on another website that a man took his truck in and what a dealership did to his 07 Silverado had nothing to do with his rear end, yoke, or trans.
Me being mechanically inclined thought for sure it would be definetly be all of those problems, but this suprised the hell out of me! They told him that it was actually his cam shaft, specifically lobe 4.
Upon first test drive I heard some terrible noises going on in the rear including a clunking at every rotation. I for starting reading around about the nightmare setup for the parking break my year vehicle.View instagram stories anonymously
So today I pulled the parking brake shoes out all together and test drove again. There is a clunking going on. I jacked it back up and noticed that I was able to turn the rear wheels when the truck is in park and the key is out. I don't think this is normal. It sounds like there is a clunking in the rear end.
At every rotation, there is a clunking and you can see the driveshaft shake every time it clunks. Any idea what it is? It's strange that I never got this noise before I did the brakes.
I also installed 2 piece backing plates from LMC trucks to replace the rusted out old ones. Please help with ideas. Joined Mar 17, First if you have an open diff in the rear one tire could spin but both shouldn't.Pathfinder kingmaker multiple romance
First, I would take a close look at your rear u-joint, grab the driveshaft and turn it hard both ways while looking at the u-joint. Is there any play if so replace it. Take the rear cover off the diff, let the oil drain, have someone turn the tire while you look inside. Jurk the tire left and right. One of these steps should help you find the issue. Gundog10 said:. Joined Sep 5, Yes, it's normal for the wheels to spin opposite directions without turning the driveshaft in the situation you describe.
The drivshaft is locked in park, and you're just spinning the spider gears in the diff. That's a promising post.
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