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Understanding Main Gears Vs. Planetary Gears
Aspiring mechanics spend hours learning about how main gears and planetary gears work in a car transmission, so a full dissertation simply isn’t possible within this relatively brief article. If you’re curious...

Related questions

Starts only when moving flywheel
Hello there, there are a few potential reasons for why your car will only start when the flywheel is turned. The most common would be the crankshaft position sensor, weak or binding starter, or a faulty cam sensor. If you...
Starter motor keeps running after car starts
Assuming that it is not an electrical issue (e.g. somehow power is NOT being cut once you release the key from the "start" position) you have a mechanical flaw with the starter. It is hard to say from your description...
After replacements, including starter, flexplate had been installed backwards
Hello. Any major transmission work that is performed by an automotive service facility is almost always under warranty at least for a short period of time. If the repair was done incorrectly, you should just need your receipt from the...
Clutch burning and smoking on 2013 Mini Cooper Countryman
Hello. Thanks for writing in about your 2013 Mini Cooper Countryman. It may be the clutch failing once more causing your condition, but it could also be a sticking brake caliper causing your brakes to overheat and smoke. Brake...
Installing manual transmission
Hello, thanks for writing in. Yes, the input shaft should be greased lightly as this shaft end endures an enormous amount of speed and friction.
clutch slave cylinder goes out and car is towed
When problems like these arise, one can look to the aftermarket world for solutions. With some research, you may be able to find a part made by a company that specializes in these vehicles and creates upgraded parts for higher...
Grinding noise and backfiring during startup
The starter on this vehicle requires a shim, so its possible that got left out when the starter was replaced. This could cause starter engagement problems and the metal on metal noise you're hearing. Backfiring, on the other hand, is...
Truck stalled at 60mph on highway..restart attempts just click, starter contacts flywheel, but wont turn over.
That is not usually a good sign. If the starter engages the flywheel and the motor will not turn, you may have a bad starter, but since the vehicle stopped while running, it is a possible that the engine has...
Grinding when 4WD is engaged
The best way to diagnose this problem is to have your vehicle inspected by a professional, such as one from YourMechanic. However, I can make some educated guesses about your noise. There is a Technical Service Bulletin (TSB) for your...
Steering wheel noise, wheels rolled over the tires' sidewall
Hello there, this is not a common fault on the 2002 Mercedes CL500. There are a few potential causes for a clunk like this. The most likely would be a failed ball joint, failing power steering rack, tie rod end,...
Tires would not turn with steering wheel
Hello there. I'm not exactly sure which "pins" you mean. I'm guessing maybe the intermediate shaft bolts? Chevy had issues with intermediate shafts on full-size trucks, but I haven't heard of anything with the Tracker. This is something that would...
Small bolt dust cover
Hello there, thank you for asking about your 1987 Suzuki Samurai. If the bolt does not fit, you're trying to put it into the wrong bore. The dust cover should not bolt to the pan gasket with the pan bolts...
Wheel bearing
Wheel bearings can be difficult to locate which of the four is making the noise. I've spent to much time crawling around a car while another technicians drives attempting to figure out which bearing is making the noise. You can...
I think my starter is misaligned.
This is often times a result of the starter solenoid being misaligned and not reaching out far enough to the flywheel. You will notice on the starter solenoid there are bolt holes that allow for a slight adjustment. This allows...
Tips for taking the flywheel off.
Hello and thank you for contacting YourMechanic. You don't need an impact wrench to remove a flywheel. You can use a breaker bar to remove the bolts. What you need to do though is remove the starter from the engine...
I can hear a knocking sound coming from my front left wheel when brakeing at above 40 mph.
In may cases the knocking sound coming from the wheel area is caused by one of two issues; a warped brake rotor or the wheel bearings that are beginning to wear out. Vehicles made after the late 1990's (like your...
Loud scraping noise
Depending on what type of vehicle you have, the loud scraping noise coming from the front passenger wheel could be a few items. First and most likely is that the wheel bearings are grinding due to lack of lubrication inside...
Slipping clutch
Clutches are supposed to slip while the clutch is being engaged so the vehicle does not jerk or lurch forward when starting out. The clutch also needs to slip when the gears are changed to ease the shock on the...
Clunking noise from rear
Hi there. This is a somewhat common issue with the majority of the E90's and E46 BMW's. These motors have what is a called a dual mass flywheel which is commonly known for creating this kind of a slight clunk...
When driving and going over 55 mph the car starts shaking like it is going to cut off.
Hi there! There are several reasons why your TL can act this way. First off, if this behavior is predominantly after the car has been sitting overnight or longer, it can be the result of "flat-spotting" - the low profile...

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