A340F Transmission Compatibility

[xcmountain80]

I am replacing my torque converter soon as it is acting up along with the bearing. My 2002 Toyota 4Runner has 418,000 miles on it. The transmission is original and it is time for replacement.

I have a feeling but would like verify that the only group of transmissions that will work are from the 01-02 4runner year range. Excluding 03-04 (says these are drive by wire, but so is my 4Runner), the 96-99, and the 00 is a mixed bag.

That being said I am ok with swapping valve bodies, accusatory, sensors, oil pans, whatever if I can get another A340F and make it work. Needless to say of all the above years the 01-02 is the most expensive in the used market.

I am not interested at this time in swapping tail shafts and what not from an A340E.

Anyone with some knowledge that could point me in the right direction would be greatly appreciated.


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[absalom]

I've found donor trans for 01-02 for cheap, but FWIW a factory reman is $2,395 through Toyota.

That being said, if only your torque converter is acting up, then I'd just keep your current trans until it actually needs replacement.

 

[xcmountain80]

I've found donor trans for 01-02 for cheap, but FWIW a factory reman is $2,395 through Toyota.

That being said, if only your torque converter is acting up, then I'd just keep your current trans until it actually needs replacement.

Even though it has 418,000 miles? I talked a few years back with a Trans Shop and he said these can go a LONG TIME like 1/2 million miles. I’ve always run Amsoil Tranny Fluid.


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[T4R2014]

At 418k, get the OEM reman and fill it with amsoil again. Fwiw, these 01-02 A340Fs have a higher failure rate than earlier years. I wouldn't trust a used one at all.

 

[xcmountain80]

At 418k, get the OEM reman and fill it with amsoil again. Fwiw, these 01-02 A340Fs have a higher failure rate than earlier years. I wouldn't trust a used one at all.

So oem reman is likely a Dealer item, or could I have it shipped to a “shop” from the dealer? Acquaintances with multiple Land Cruiser type shops in my area.


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[thegipper]

The only tranny that will work is from an 01/02.

If the rest of the truck is in good shape, I'd go with an OEM reman in this case. The 01/02 tranny's are more prone to having planetary gear failure than the earlier years.

 

[T4R2014]

So oem reman is likely a Dealer item, or could I have it shipped to a “shop” from the dealer? Acquaintances with multiple Land Cruiser type shops in my area.


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Pretty sure it has an OEM part number. I think Timmy the Toolman knows better than me on those specifics.

 

[xcmountain80]

Pretty sure it has an OEM part number. I think Timmy the Toolman knows better than me on those specifics.

I will ask. He didn’t have anything to offer as far as the compatibility. But I will ask.


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[T4R2014]

I will ask. He didn’t have anything to offer as far as the compatibility. But I will ask.


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Compatibility for 01-02 is only 01-02. There are A340F variances between 96-98 and 99-00, but they've been proven to be interchangeable across 96-00.

 

[xcmountain80]

He said.

#350103G17084
https://parts.camelbacktoyota.com/p...er=350103G17084&vehicleid=84053&siteid=214329


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[Dan.3]

Wow. Some really bad info in this thread. A 340f is a 340f. The only difference that I am aware of is the kick down cable. I believe up to 2000 it was via cable. After 2000 it was electronic. Regardless that parts are interchangable. There may have been some differences in the materials used or tolerance specs from the factory with the planetary gears in 01-02, but the gearing, tq, vb, housing, is the same. You can use a 340 from the late models sequoia, 4th gen, and tundra with the 4spd auto and even the T100. You might have to swap a few of the connections since the body harness might not be the same.

 

[thegipper]

I think our point was only an 01/02 will work without modifying a bunch of stuff. In fact, I don't know if I've ever read anyone doing that on this forum.

96-00 are completely interchangeable without having to modify anything. I have a 99 in my 97. The valve bodies are different on the 96-98 versus 99-00 trannys but everything still hooks up fine without having to modify anything.

Not saying it can't be done but I've just never seen it.

 

[absalom]

Even though it has 418,000 miles? I talked a few years back with a Trans Shop and he said these can go a LONG TIME like 1/2 million miles. I’ve always run Amsoil Tranny Fluid.


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Is the tranny slipping, misshifting, or overheating? If not, why fix what’s not broken? I have 300k in my 01, and it’s perfect. Regardless of mileage, I’m not ditching it until an issue pops up.

 

[T4R2014]

Wow. Some really bad info in this thread. A 340f is a 340f. The only difference that I am aware of is the kick down cable. I believe up to 2000 it was via cable. After 2000 it was electronic. Regardless that parts are interchangable. There may have been some differences in the materials used or tolerance specs from the factory with the planetary gears in 01-02, but the gearing, tq, vb, housing, is the same. You can use a 340 from the late models sequoia, 4th gen, and tundra with the 4spd auto and even the T100. You might have to swap a few of the connections since the body harness might not be the same.

Ok, get a 2002 A340F and make it function properly using all harnesses and cables found in a stock 1996 4Runner. I'll even challenge you: make it work in a 3RZ powered 1996. Time and money should be of no significance in this endeavor. Counting on you.

Also, if you look into some parts diagrams you'll find different part numbers for valve bodies and torque converters. A340 is a broad terms for a family of transmissions.

 

[xcmountain80]

Is the tranny slipping, misshifting, or overheating? If not, why fix what’s not broken? I have 300k in my 01, and it’s perfect. Regardless of mileage, I’m not ditching it until an issue pops up.

I’m glad you asked and apologize for not mentioning it prior. I have a leak, Lucas trans slip whatever has since stopped the leak for the most part. At 3k rpm or higher it leaks, pulling a 21’ boat it leaks. I assume it is the front seal. The torque converter is vibrating at idle enough that the exhaust runs the frame. The torque converter whines when you let off, likely a failing bearing. I’m not looking to replace the high mileage item for the hell of it. It is a failing part/s and I want to be ahead of the curve when it happens. So issues are plenty. If I’m pulling it to swap a bearing, seal, and torque converter the. I am replacing the thing once and for all.

Additionally the link and part # provided by Timmy the Toolman was a Factory Rebuilt Tranny. This is as good as it will get. If a used unit is $1100 and a factory rebuilt unit is $2500, it’s easy to know the right path to take.

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[AntleredRuin]

Where are you seeing used for $1100? A junkyard tranny is around $200. Florida LKQ Pick and Pull has them listed for $145, with 30 day return.

A junkyard that already has one pulled with enough warranty to make sure it works fine shouldn't cost you more than $300

 

[T4R2014]

Where are you seeing used for $1100? A junkyard tranny is around $200. Florida LKQ Pick and Pull has them listed for $145, with 30 day return.

A junkyard that already has one pulled with enough warranty to make sure it works fine shouldn't cost you more than $300

Parts aren’t that cheap up north, and the higher failure rate of the 01-02 definitely hasn’t helped used prices.

 

[AntleredRuin]

Prices may be different up north, but I think the OP is in Florida, unless it's a different Palm Beach.

Would a junkyard (even a large chain like LKQ) be knowledgeable enough about things like the 01-02 trannies to jack the prices up unfairly?

 

[absalom]

I’m glad you asked and apologize for not mentioning it prior. I have a leak, Lucas trans slip whatever has since stopped the leak for the most part. At 3k rpm or higher it leaks, pulling a 21’ boat it leaks. I assume it is the front seal. The torque converter is vibrating at idle enough that the exhaust runs the frame. The torque converter whines when you let off, likely a failing bearing. I’m not looking to replace the high mileage item for the hell of it. It is a failing part/s and I want to be ahead of the curve when it happens. So issues are plenty. If I’m pulling it to swap a bearing, seal, and torque converter the. I am replacing the thing once and for all.

Additionally the link and part # provided by Timmy the Toolman was a Factory Rebuilt Tranny. This is as good as it will get. If a used unit is $1100 and a factory rebuilt unit is $2500, it’s easy to know the right path to take.


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Makes complete sense. That is exactly what I would do.

 

[Dan.3]

Ok, get a 2002 A340F and make it function properly using all harnesses and cables found in a stock 1996 4Runner. I'll even challenge you: make it work in a 3RZ powered 1996. Time and money should be of no significance in this endeavor. Counting on you.

Also, if you look into some parts diagrams you'll find different part numbers for valve bodies and torque converters. A340 is a broad terms for a family of transmissions.

I ran a 340h behind a 5vz using the 99 ecu on an unmodified 3rd gen engine harness. Swapped the speed sensor, solenoid harness, and park neutral switch from a 99 340f. Took me all of 30min to swap over. No codes. Shifted great. I even think I ran the 340f tc on the 340h.

Difference between a prior to 01 and after 01 is the kick down cable. To avoid that hurdle. just grab a 340f from a sequoia or tundra or grab a drill or plug. But if you want a straight direct bolt without having to touch a thing, then your only option is the 01-02.

That being said, I personally would not buy a used transmission that has been sitting in the junkyard for a while unless you have another DD. But I have heard of people who have and not had issues. But then there are the one who did have issues. I suggest looking into a reputable shop that rebuilds transmissions or spend the money for a reman.

I had mine rebuilt after I picked up my 99 when when the previous own had the strawberry milkshake. I have put over a 100k on it since and still shifts strong.