element

Does anyone know the default bolt size and thread pitch for the transmission drain pan on a 2002 4Runner?

I think it’s the same part for both 2WD and 4WD, but mine is the A340E (2WD) transmission.

The bolt is stripped and the threads on the pan look like they were cross threaded. I’m trying to figure out my options for tapping the pan without having to replace it...

element

After taking some measurements, it looks like 10mm x 1.50. The plug itself is 8mm long.

***Edit - corrected thread pitch

toy_tek

btw, just happen to be in the manual. Torque is 65 in/lb.

element

I made a correction to my second post. The thread pitch was actually 1.50.

20014runner

I have the same problem. My original bolt was stripped from the very top of it. I replaced it with a new oem trans bolt with crush gasket. It went on tight, could not hand tighten it. I needed to turn the bolt with my socket wrench. It torqued it down, but required some muscle. Not good, should go on relatively easy. The dealer told me you can't tap a trans pan, so if the trans pan is cross threaded, what do you do? Replace the pan unfortunately, sucks. But if you don't want a slow drip problem, that's probably the best solution. Let me know if you have any ideas or if my dealer is incorrect. thanks

hotlavaaaa

This is sort of a hijack, but can anyone tell me if the transmission plug gasket is the same as the oil drain plug gasket?

element

The transmission plug gasket is different from the oil plug gasket. If you were in a pinch, you could probably use the Oil-Tite M-10 gasket (P/N 65306 available at most auto part stores). The M-10 is slightly taller and not “rolled” the same way that the OEM gasket is but the design is similar.

element

To follow up on this, I was able to take the pan off and chase the threads with a 10 x 1.50 thread tap. I don’t think that it would be possible to go up to a 12 if the threads were really bad. Not enough metal on the inside of the pan (you would probably need to increase the size of the drain hole by less then 1 mm). There may be a SAE size that is slightly larger than 10 x 1.50 that would work.

Surprisingly, the hardest part was finding the drain plug. It is very short. If you went to a larger SAE thread, I would advise you to cut and grind a bolt to the right length for your new plug. I drove around for hours looking for a equivalent sized bolt. By the looks that I was getting, you would have thought I was asking for a part from the space shuttle!

hotlavaaaa

do you have a part number for the oem gasket?

element

No, sorry. I found a receipt but I think it was from the differental gaskets.