Be ready for more fluid. I did not find any scoring, grooves, shiny spots on end plugs or any debris. Downshifts under acceleration happen without hesitation cold and hot. Started monitoring my fluid temps. The reason I had to open the valve body is that the pistons to the shifter solenoids broke off when removing them to replace with new. So pretty a catastrophic failure. I had to do this a few times to get things right.
Set aside the lower vb in a safe clean place. Just curious, when you did the trans rebuild, did you go with a rebuild kit? Refer to the shop manual for the proper instructions to make both adjustments. Truck: 2000 Prerunner Ext Cab 3. You may need to hold the upper vb down. After installing the kit the end plugs were all tight.
The location of these items is shown in on of the Zip kit doc diagrams. Per the Zip Kit doc I need to document my own checkball locations because they vary across different versions of the 340 and vb castings. You may have to push on the end plug to relieve pressure on the shim. One incident of 1st to 3rd shifting on side streets after exiting the highway no codes. I am looking forward to testing it for longer hops and also carrying some weight.
The hotter the fluid, the thinner it gets and then it slips past those end plugs. The assembly lube makes this fairly easy. The kit also seals multiple circuits known to suffer from end plug leakage or poor checkball sealing. Installed the Sonnax Zip Kit in my A340e Transmission a couple of weeks ago. There is a 12mm bolt holding the top to the engine head.
My old ones came out in one piece but they were brittle and came apart easily. Common Problems Found In The Toyota A340E Transmission Posted by on Wednesday, March 20th, 2013 The A340E is an automatic transmission made by Toyota. Proceed at your own risk. Disclaimer: I don't know anything about transmissions. Symptoms: Occurrence of P0770 last year no codes since. The following bolts can stay.
Also, this would be a good time to compare the vb shape and casting number with the Zip Kit documentation to make sure the kit covers the vb Type 4 for mine. Hope this experience helps others in keeping their Gen 1's in good running condition. However, if you have the money, it might be worth it to just do the whole kit since you have the valve body open. Is the cylinder is damaged or does it have deep scratches in it? Moving forward I am double checking everything to make sure it is clean before it goes back together. You start to hear it thrashing around, leave it a while, smell something burning, then finally consent to taking it apart. It was used behind both gas and diesel applications. The truck downshifts in all gears as it should.
I just received the kit so I'm gonna drop the Valves and change out the plugs and related parts and cross my fingers. I have heard of some people adjusting the cable thinking that they could increase pressure. Usually, by the end of my work commute I could always reproduce the 3rd to 2nd hesitation issue. All other shifts were crisp with no problems. Look at your gaskets to to make sure they have the rough outline of your vb. Even though my Tacoma is a 2000, this started to sound like the Toyota tech bulletin for the 2002s that needed vb modifications.
One incident of 1st to 3rd shifting on side streets after exiting the highway no codes. Be ready for more fluid. Set the separator plate in a safe clean place. A magnet might work too. They were able to confirm the right part numbers for my vb gaskets. I appreciate the information found on this page.
Refer to the shop manual for details on how to correctly make the adjustment. I also snapped some pics of them. This is going to save a lot of trouble. I don't think the Zip Kit is the silver bullet for all trans problems, but in my case it worked out great. Check the Zip kit install doc.