Transmission Gear: How to Replace It
Your car's transmission contains gears that assist in shifting your car to make it move faster. If your transmission starts to slip and your car won't start, then its gear might be replaced. Perhaps its dog teeth are already worn and your shifting is already compromised by it. Here are some steps you can follow to replace your transmission (first) gear.
Difficulty Level: Hard
What You'll Need
- Transmission gear replacement
- 2 muffler gaskets
- 30-millimeter deep socket
- 17-millimeter hex key
Step 1: Raise up the rear of your car with drive-up lift ramps. This is to avoid both wheels from turning if you lack an impact wrench for the job. The parking break alone isn't enough to prevent wheel turning when you're loosening up the expansion nut that holds your gear into place.
Step 2: Support the transmission and the engine. You need to disconnect the car's rear transmission mounts then place a jack stand under the transmission case (just near enough the engine-transmission assembly).
Step 3: Empty the gear oil out of the transmission. Use a 17-millimeter hex wrench and have an oil tray on standby as you remove the oil drain plug. Afterwards, remove the drain plug and filler for thorough cleaning.
Step 4: After emptying the transmission, disconnect the speedometer cable that's linked to the rear transmission cover. Disconnect the shift linkage too for safety's sake or don't place any force on it when disconnecting transmission mounts.
Step 5: Remove the muffler to gain access to the transmission rear. Check the muffler bracket and don't avoid putting pressure on your exhaust heat exchangers.
Step 6: After muffle removal, disconnect the ground strap and loosen to remove the two rear transmission nuts that hold the transmission onto your vehicle. Also remove the washers and nuts that fasten the transmission rear cover to the housing.
Step 7: Make sure to avoid letting the intermediate plate from sliding off. After rear cover removal, be careful to not let the bearings and gears to fall out too. Also replace at least two of the nuts with spacers on the rear studs.
Step 8: Loosen the 13-millimeter bolt on the shift fork for removal from the shaft. Slide the slider off of the driver shaft and check its inner teeth if it's worn out.
Step 9: Remove the expansion bolt holding the first transmission gear with a 300-millimeter deep socket. This nut is connected to the differential and wheels.
Step 10: After removal of the bolt, the whole first gear assembly can be slid off of the drive shaft. Afterwards, replace it if the first gear has flat and worn dog teeth.
Step 11: After reassembling your first gear, install everything back in reverse order while taking note of the right torque specifications from your car's manual.
Step 12: Don't forget to refill your transmission with transmission fluid. After installation is done, take your car out for a spin and see if the new replacement gear holds up.
Automatic transmissions shift by itself while manual transmission makes use of gear shifts to give you more control when it comes to shifting from one gear to another. With that said, here's what you should do to replace your transmission gear. At any rate, you can easily see how labor-intensive it is to get to your transmission just to replace any one of its multiple gears (in this case, the first gear).