I have an oddball truck (I think) which has me confused about which torque converter is correct for the intended application. It's a completely stock 1986 4x4 xtra cab pickup with a 2.4L 22R-E factory-mounted to a A340H auto-transmission. According to the Aisin transmission wiki, the A340H transmission was installed in Toyota's 1988-1995 Pickups and 4runners but only with the 3.0L 3VZ-E V6 engine. I don't know how one ended up in my truck from the factory back in 1986 but it's there and they stamped it onto the firewall plate (see pic below). The '85-'95 2.4L 22R-E should have the A340F transmission if it's an automatic, which is exactly the same as the A340H except the shift selector linkage is mounted 90-degrees offset (F is on top and H is on passenger side), the H shares fluid with the transfer case, and the H is a bit more beefy, however they both can use the same torque converter but they're listed with different stall speeds.

And this is my dilemma:
The 3.0L with a A340H uses a high stall torque converter (2,800 rpm)
The 2.4L with a A340F uses a stock stall torque converter (2,000 rpm)

So which one is a 2.4L with a A340H supposed to use? I think it should use the stock stall speed TC based on the size of the engine it's mounted on considering the transmission gears are exactly the same. Does this sound logical?

 

So, really it comes down to whether you want a little better economy (low stall converter) or a little better acceleration (higher stall converter). Personally, I would probably go with the higher stall option, but that is just my preference and may not be yours.

 

Torque converter stall speed is the maximum RPM the engine will reach without the transmission/drive shaft moving. Think putting your bumper against a wall, or power braking, your engine speed will cap out at this rpm. In the case of power braking you get the torque of X rpm when you let off the brake.

Peak torque on a 22re is about 2800 rpm, it's starting to flatten out at 2000.