[BamaDrewski]

I have the original A340F transmission in my rig and getting close to that 300K mark. I added and external transmission cooler years ago and bypassed the radiator.

This transmission still shifts smooth as silk - no slipping, no banging, etc. I run Mobil1 Synthetic ATF in it and have since around 120K. I do a four quart "drain and refill" every year. I also put in an inline transmission oil filter several years ago as well and check it/clean it annually.

Anyone else getting this kind of durability out of this transmission? Just curious......

[StreetCreeper]

Yes. 431,000 miles and shifts great. I replaced 3 solenoids and did a 16qt flush about 75,000 miles back.

[19963.4lsr5]

270,000 miles in my 97.


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[zazzomicron]

Originally Posted by StreetCreeper

Yes. 431,000 miles and shifts great. I replaced 3 solenoids and did a 16qt flush about 75,000 miles back.

Was this easy to do? Sometimes mine shudders while shifting and I'm wondering if this would help..

[zazzomicron]

Originally Posted by BamaDrewski

I have the original A340F transmission in my rig and getting close to that 300K mark. I added and external transmission cooler years ago and bypassed the radiator.

This transmission still shifts smooth as silk - no slipping, no banging, etc. I run Mobil1 Synthetic ATF in it and have since around 120K. I do a four quart "drain and refill" every year. I also put in an inline transmission oil filter several years ago as well and check it/clean it annually.

Anyone else getting this kind of durability out of this transmission? Just curious......

Would LOVE to see a writeup on this maintenance..

[diverscale]

Originally Posted by StreetCreeper

Yes. 431,000 miles and shifts great. I replaced 3 solenoids and did a 16qt flush about 75,000 miles back.

what were the symptoms for you to change the solenoids?

[theesotericone]

Originally Posted by diverscale

what were the symptoms for you to change the solenoids?

After 430,000 miles do you really need symptoms? lol

[StreetCreeper]

Originally Posted by diverscale

what were the symptoms for you to change the solenoids?

IIRC, I was in the middle of a 1500 mile run and the torque converter started unlocking/locking constantly at highway speeds. Annoying as hell but not the end of the world. Wasn't sure exactly what was causing the TC to lock/unlock repeatedly – until it threw a tranny solenoid code for the TQ. Oh and I also noticed that there was a certain delay in down/up-shifting under certain conditions such as slowing down for a red light and then before coming to a stop, the light turns green and you begin to accelerate but there would be a slight delay before acceleration.

Figured since I was going to replace one solenoid, I would just replace all three while I was up in there at the high milage I was at.

Swapped all three out, cleaned the strainer, pan and magnets then flushed with 16qts Valvoline Maxlife and haven't had any issues since.


Pan and magnets before & after. Note the magnet material after about 350,000 miles. Not too shabby me thinks...

[StreetCreeper]

Originally Posted by theesotericone

After 430,000 miles do you really need symptoms? lol

To be fair, it was only about 350,000 miles @ the time....

[StreetCreeper]

Originally Posted by zazzomicron

Was this easy to do? Sometimes mine shudders while shifting and I'm wondering if this would help..

It's not difficult in the traditional sense. It's just something that can be time consuming and you want to be meticulous when you are doing it.

Pretty sure there should be a write-up on it somewhere.

[amalik]

Originally Posted by BamaDrewski

I have the original A340F transmission in my rig and getting close to that 300K mark. I added and external transmission cooler years ago and bypassed the radiator.

This transmission still shifts smooth as silk - no slipping, no banging, etc. I run Mobil1 Synthetic ATF in it and have since around 120K. I do a four quart "drain and refill" every year. I also put in an inline transmission oil filter several years ago as well and check it/clean it annually.

Anyone else getting this kind of durability out of this transmission? Just curious......

I have an inline filter also, you clean it instead of replace it? I thought every 30k they should be replaced...

[Sup41]

Originally Posted by BamaDrewski

I have the original A340F transmission in my rig and getting close to that 300K mark. I added and external transmission cooler years ago and bypassed the radiator.

This transmission still shifts smooth as silk - no slipping, no banging, etc. I run Mobil1 Synthetic ATF in it and have since around 120K. I do a four quart "drain and refill" every year. I also put in an inline transmission oil filter several years ago as well and check it/clean it annually.

Anyone else getting this kind of durability out of this transmission? Just curious......

Did you lift your vehicle and increase tire size at any point? I just lifted mine and upgraded to 33's and i'm wondering if that is going to suck any long term life out of them. Hard to imagine it not...

[diverscale]

Originally Posted by StreetCreeper

IIRC, I was in the middle of a 1500 mile run and the torque converter started unlocking/locking constantly at highway speeds. Annoying as hell but not the end of the world. Wasn't sure exactly what was causing the TC to lock/unlock repeatedly – until it threw a tranny solenoid code for the TQ. Oh and I also noticed that there was a certain delay in down/up-shifting under certain conditions such as slowing down for a red light and then before coming to a stop, the light turns green and you begin to accelerate but there would be a slight delay before acceleration.

Figured since I was going to replace one solenoid, I would just replace all three while I was up in there at the high milage I was at.

Swapped all three out, cleaned the strainer, pan and magnets then flushed with 16qts Valvoline Maxlife and haven't had any issues since.

Thanks. Having the same symptoms with mine, except o/d finally completely failed to achieve and that I have a harsh shift going reverse. Solenoidss are already ordered, glad this is probably my fix.

[LittleCaesar]

I'll play devil's advocate and say no for mine at 125,000, but that is due to the previous owners towing a 20ft boat with OD on all the time for the first 60,000 miles. And this is something I expected in the future back in 2006 when I bought the 4runner.

Aisin makes some great transmissions. I'd probably rank them right behind Allison as far as durability goes.

The OP gets great service out of his due to all the Liqui Moly liquids it has been subjected to over the years.

[tx_shooter]

Originally Posted by diverscale

Thanks. Having the same symptoms with mine, except o/d finally completely failed to achieve and that I have a harsh shift going reverse. Solenoidss are already ordered, glad this is probably my fix.

I swapped my solenoids out last night and it took a little under 2 hours. I had to keep going back inside my house (I was trying to play hookie from work so I had to take calls) so it took me longer than it should have. The steps are straight forward: drain trans and let it drip for an extra 10-15 mins while you prep, drop the pan bolts (10mm), drop the filter (12mm), unbolt and pull the solenoids (12mm and 8mm), unplug old solenoids, plug in new solenoids and bolt back in, bolt back in filter, clean pan gasket surface, bolt pan back up.

Tips - I found that a dab of orange gasket tube on each corner works great for holding the rubber gasket in place. Be careful with the torque on the bolts - this is aluminum and strips. A roll of paper towels and safety glasses is a good idea because the transmission will drip ATF the whole time you are working on it.