Have a 2003 4Runner (V8). Went to do a drain/fill of transmission fluid. The plug just turns (medium amount of friction), when realized it wasn't coming out tried tightening back up - does not totally tighten. I have had this plug out a couple times to do drain/fill and always very careful when retightening - used a torque wrench (torque is supposed to be 21 ft lbs). Has anyone else had similar problems with this plug and what did you end up doing to resolve - replace entire pan or try different bolt or? If you have experience with this one please let me know what you may have been successful doing. I'm sure if I took to Toyota Dealer it would become a very expensive fix (I'm sure they would want to be putting in a original Toyota transmission pan. I have not removed the plug in case i end up taking it to a mechanic to fix.

 

Easiest way to fix it would be to remove the pan and tap the stripped boss to a slightly larger size.

 

The infamous transmission pan plug issue! Many 4Runner owners have experienced this problem. Here are some potential solutions:
Option 1: Replace the Plug Try replacing the plug with a new one. You can purchase a replacement plug from Toyota or a third-party supplier. Ensure the new plug is the correct type and size. Option 2: Use a Helicoil A helicoil is a threaded insert that can be installed into the transmission pan to repair the damaged threads. This is a more involved process, but it can be effective.
Option 3: Replace the Transmission Pan If the plug is damaged or the threads are severely stripped, replacing the transmission pan might be the best option. You can purchase a replacement pan from Toyota or a third-party supplier.

 

Option 4: Use a Thread Repair Kit A thread repair kit can help repair the damaged threads. These kits usually include a specialized drill bit, tap, and insert.
Option 5: Consult a Mechanic If you're not comfortable attempting to repair the plug or transmission pan yourself, consult a mechanic. They can assess the situation and provide a recommended course of action. Before attempting any repairs, ensure you have a good understanding of the process and the necessary tools. If you're unsure, it's always best to consult a professional mechanic.

 

What might be the likelihood that a new plug would help. I ask because this is something I could easily try myself, however, if it doesn't quite work then i may have trouble getting the drain hole replugged in order to take it to garage (and of course another 4L of fluid used). For reference, I have done a drain and fill a couple of times and according to my notes I believe i torqued the drain bolt to 21 ft lbs (I would have looked this up somewhere). However, I see online now that many are saying it should be 15 ft lbs (although I did also see a 27 ft lbs noted somewhere). Anyways, I suppose it could have been that 21 ft lbs that was too much for the thing to take.