KZJ78 A340 Auto upgrade kit install

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Joined
Aug 21, 2006
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Location
Auckland, New Zealand
After doing all sorts of mods to the Prado engine wise it was time to play with the auto...
I find the auto changes a little slow at times when you don't want it too and also reading up on the net tweaking the valve body's can help with better changes, less friction as it slips less and less heat.... Got to be good.....
There are some quick fixes where by you pack up the springs in the accumulators but that's really only half the story.....
A few re builders is the states use these kits or similar with the Supra's and AW4 auto's in the Jeeps with good results and still use the std friction linings....
So I ordered one! And it arrived last week....
IMG_5070.jpg

And.....Well I got bored and started putting in the valve body upgrade kit...
So it was off with the pan and let it drip dry...
IMG_5067.jpg

Here is the valve body, will let it drip dry and pull it apart during the week...
It gets new balls !, gets some removed... Some holes in the plate get drilled out to allow better flow...And also some new rated springs.
IMG_5065.jpg

The accumulators below get new springs and rods....
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The kit comes with great instructions with photo's....So with paitence any one could do this...
It also helps the truck has a lift and sitting on 35's... Easy to work under.
So far its only take me about an hour......

Will add more as I progress...
 
I look forward to hearing how this works out for you. Thanks for sharing.
 
Well its all back together after modding the valve body and playing with the accumulators.
Pan is on and sealant curing. Tomorrow its fluid in and fire it up again!...
 
Well put in more fluid and went for a drive....
Driving gently its feels a little sharper in the gear changes..
However when pushing it hard it changes nice and sharp...
And certainly feels stronger...
However only done a few k's in it...
Time will tell....
At least it still goes ! and I didnt stuff it up Phew....
 
Nice! Glad it worked out. I'll have to add this to my wish list of modifications to my LJ78.
 
Update: Took it off road in the weekend.... Oh feels good... Nice and firm in low.... never missed a beat all day.... this combined with the manual control.....
Great to start off in 2nd..... and it actually starts and stays in second (no chop down)
 

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