Most minor, single mouth ulcers are caused by damage to the mouth, for example by accidentally biting the inside of your cheek while eating, or from a sharp tooth, food or filling.
I have a 2005 Honda Element. The owners manual states the brake fluid should be replaced every 3 years. When I asked the dealer to replace the brake fluid, they said it was going to cost $190. I told them last time they did it, it was only $27.
Over time the diff fluid (gear oil) breaks down and cannot bear the same forces like new oil can. I try to change my diff fluid in my rear axle at least every 15,000 miles and around 30,000 on the front axle since it is only under load during the occasional 4Ã4 trip.If you tow with your vehicle or race it, I recommend changing the fluid more frequently.his project should only take 30-45 minutes once you get used to the technique. Follow along in the easy steps below and you should be just fine. This writeup is based off of a Dana 30 differential, but it applies to almost any differential.