Before you begin:
* Consult your owner's manual: It's the best source of information specific to your truck. It might even tell you the transmission fluid type and capacity.
* Gather your supplies: You'll need the correct type and amount of transmission fluid (check your owner's manual), a new drain plug washer (very important!), a drain pan, a wrench (likely a 10mm or 12mm for the drain plug), and possibly a pump or syringe to refill the transmission. Some people use a funnel. Gloves are a good idea too.
Procedure (This is a general guide, consult your owner's manual for specifics):
1. Warm up the transmission: Drive the truck for 10-15 minutes to warm the fluid. This will make it flow more easily.
2. Locate the drain plug: This is typically on the bottom of the transmission case. It's usually a bolt.
3. Position the drain pan: Place the drain pan under the drain plug.
4. Remove the drain plug: Carefully loosen and remove the drain plug, letting the fluid drain into the pan. Be prepared for it to be hot!
5. Inspect the fluid: Check the color and consistency of the fluid. If it's very dark, smells burnt, or has metal shavings, a more thorough inspection of the transmission may be needed.
6. Replace the drain plug: Once the fluid has stopped draining, replace the drain plug with a new washer. Tighten it securely, but avoid overtightening.
7. Locate the fill plug: This is usually on the side of the transmission case. It's also a bolt.
8. Refill the transmission: This is the trickiest part. You'll need to add the correct type and amount of transmission fluid. The amount needed will vary depending on your specific transmission. Your owner's manual should have the capacity. Use a pump or syringe to add fluid through the fill hole until the fluid starts to come out of the fill hole. Then tighten the fill plug.
9. Check fluid level (optional): Some manual transmissions have a dipstick, but many don't. The fill-until-it-flows method above is often the best way to ensure proper fluid level.
10. Test drive: After refilling, test drive the truck to check for any shifting problems.
Important Notes:
* Fluid Type: Using the wrong type of transmission fluid can severely damage your transmission. Absolutely confirm the correct type from your owner's manual or a parts store using your VIN.
* Overfilling: Overfilling a manual transmission can be just as damaging as underfilling.
* Professional Help: If you're uncomfortable performing this task, it's best to take your truck to a qualified mechanic.
This is a simplified guide, and procedures may vary slightly depending on your specific S-10 model. Always consult your owner's manual and if you're unsure about anything, seek professional help. Improper fluid changes can lead to costly transmission damage.
