OK I have a 1995 4runner with a 3.0. 4X4. My question is, how reliable is the tranny, and how often does ot need to be serviced?

 

...oh, you've got an auto

They're good trannies, don't think I've ever heard of someone having to spway one out because they broke it. Ands they will stand up to a fair amount of power seeing that toyota used the same trannie(s) from 86-2000(or so)

As for servicing, you really need to define it. Change the oil regularly(once a year at least), use an oil cooler, and don't do anything dumb. You don't need to get it rebuilt every 5 years if that's what you're wondering about.

 

yeah..toyota has some of the best transmissions if not the best. one guy on here works at a tranny shop and he said that he's rebuilt a few of these before and they are rock solid. i believe it too. and i also know jeeps have some of the worst transmission problems.

 

10-4, I have been working on transmissions for 15 or so years and here is my take. I have built two automatic Toyota four wheel drives in that entire time. Both were 2nd gen 4Runners and both had over 150,000 miles on them. Both were in the last 2 years.

I last week had to put a solenoid on a 96 Camry. Once I replaced the transaxle in a Lexus 400. I see at least 6 Chevy trucks a month. At least 8 Ford trucks a month and probably 10 to 12 Chrysler trucks a month. We all know that there are way more Toyotas on the road than I have in my representable sample so that tells me a LOT. My main profit line is Ford front wheel drive and Chrysler minivans.

 

As a matter of fact, some mid 90s Cherokees have the same trans as our 4Runners, BUT Chrysler changed the valve bodies to be able to use their own electronics. I used to see these all the time but thankfully most of them are in the boneyard now. The other automatic Cherokees had a Peugot trans. That should be enough reason never to buy a Chrysler product.

 

Ok this is really funny considering Aisan makes the Jeep AX series trannies

I don't know about Jeeps running that same trannies as Toys, but the AX5 and AX15 trannies in YJ's and XJ's were made by Aisan...I'm pretty sure this is as close as they got.

 

In the mid 90s Jeep used the A340H by Aisin Warner. This is the Toyota transmission company. It is a partnership, (or always was), between Toyota and Borg Warner. The transmissions in the Toyotas and Jeeps were identical except for some of the valving and electronics.

 

I stand corrected. I didn't know about the automatics

 

Jeeps never had the A340H..
The XJ's came with the A340F.

They use the NP231 xfer case.




Fred

 

Which specific Peugot auto tranny do you think that they used ?




Fred

 

So anyway it's the next generation A340H in my shop we'd say "Well it's the same thing just this little thing is different." Starting in 1995.

OK Fred, typing too fast, meant some of the standards.

 

In all the info I have available here right now. The Jeep AW4 transmission is simply listed as a crossover to the Toyota A340 with no qualifying last letter.

Also, all the diagnostic and fix database information on the AW4, A340H, and A340F is one section with no subsections for last letter.

 

That's true, however there is a major difference between the A340H and the A340F and that is in the A340H the tranny and xfer case are an integral unit and they aren't easily separatable.
With the A340F the xfer case is not part of the tranny.
The Jeep XJ's had A340F's, not A340H's. The Jeeps used NP231 xfer cases




Fred

 

Tada Thanks Fred I was thinking it had to just be the transfer case difference.

 

cherokees from 87-01 with the 4.ol inline six had the aw4 trans, also some (first half of the build year) 93 grand cherokees with the 4.0l also had the aw4 also. sometimes the solenoids go bad and the when the xj guys order them sometimes they come stamped with toyota on them!

 

its a nice thing to throw at the jeep guys when they get all high on the hog about their rigs! without our transmissions, they wouldnt get off the dealers lots!!

lee

 

I have had my 91 4runner with 3.0 and the A340H for 4 years. I have put on around 50,000km with 33" tires and bigger (up to 38.5's) I have had ZERO issues with my tranny. The only issues i have had are solenoid related and it was actually the TPS. I have 300,000 on the original tranny and motor. Neither one has been touched except for motor accessories. i am running 4.56 gears in the diffys so the tranny has been working hard with the big tires. It shifts as hard as the day i bought the truck with around 225,000km's. I have zero tranny slip. I can put it in 4x4 low and with the tranny in drive with 33x12.50s i can chirp the tires and break them loose off the line and between 1st and 2nd.

I get the tranny flushed once every couple years. If you have the A340H it actually has a factory tcase cooler inside the frame at the front passengers feet. I have never over heated the tranny or tcase fluid.