MT Accumulator Delete Mod (ADM) and BS Thread

So it is serving as a one way flow control valve. That makes more sense with the design. With the applied pressure the disk movement or deflection, opens up the port allowing fluid to move freely, then when fluid pressure drops the disk closes the port slightly to restrict fluid return. The disc will also act as an accumulator because of its size. (Not repeating you, just repeating it out load for my own understanding in a sense)

I did try to find a clutch accumulator principle of operation video but only came up with deleting your Tacoma Accumulator vids... I will try images instead.

 

Yeah. I was surprised by the number of Taco ADM hits that were out there. When I was looking for details back in 2018, there wasn't much, other than @rat107 's video. Then, @RedBeard1 jumped in with what he did with the brake line elbow. From there, it was smooth shifting.

 

I think the difficulty with a fixed orifice is that its restriction to flow increase exponentially with size, and obviously affects both directions.

 

The steel disk is 1.59mm thick with a diameter of less than 43mm. I have a hard time seeing a force great enough to put any meaningful deflection on it not blowing out the much thinner hardline.

I'm not sure I buy the explanation that it is simply a flow restriction. However, looking at mine with an otoscope did not reviel anything obvious. The external design certainly uses more material and is more complex than would be needed if it was only the flow between the two holes (same is true if it was the disk deflecting). Of course, I'm just making SWAGs. Perhaps having an accumulator milled down would actually be helpful.

Edit: Of course the fact that increasing flow between the two holes (via milling or a modified disk) changes the function significantly suggest that my SWAGs my be wrong.

 

Removed that box and used the cable fix. Took an hour. Barely a drop of leak after pinching. Night and day difference. Proper clutch action.

 

I would have posted this in the “Buy / Sell” forum but I’m not at 50 posts yet. When I looked up my vehicle it’s saying the accumulator won’t fit. Is there really a difference in years? I have a 2019 OR DCSB M/T

 

This is from the website.

 

Very interesting and good question. When I looked to see if the accumulator was a different part number the Toyota Parts website does not even LIST the OR as a trim level in 2019 (or 2020).



I cannot confirm that it will fit that specific model, however I am HIGHLY confident it will. If you do have problems I would happily work with you on it.

 

The parts websites for Toyota really suck for filtering by model. I mean, what kind of trim level is "double cab TRD PRO SR-5 GLX"? If you had an SR5, which one would you choose? I've had all sorts of trouble picking parts for my 21 OR. Usually cross reference multiple websites that say "fits" per my VIN until I feel confident enough to buy the part.

For this specific discussion, I don't think there are any differences on any accumulator from 2016-2023 6 speed manual transmissions.

 

Chances Toyota changed something MT related partway through third gen builds then changed it back two years later? 0.000001%? MT is like 3% of total sales? Heck, the clutch start / cancel is still a tall switch, the only one on the truck, necessitating that tall blank for AT’s.

 

There are no SR5 MTs. Just the Sport, OR, and Pro have MTs and accumulators. The 2016 and 2017 2.7l SR did not have an accumulator.

The TRD models are known to be sort of option / trim packages above the SR5.

 

I know, I was more speaking generally about finding any parts on Toyota sites. It's easy to get lost in the weeds about what fits what when it lists the trims like that. For example, finding what actual cluster lens I need is really challenging.

Yes, for the accumulator specifically, the SR5 part is irrelevant completely.

 

Shifty did a nice post on Tundras about how to use the parts finder, just to aid anyone else trying to find stuff.

https://www.tundras.com/threads/howto-use-the-toyota-parts-system-to-find-order-parts.113808/

 

I've seen better and worse parts lists. The fact that the part number shown on the diagrams is sometimes different than shown in the list is pretty bad though, along with the stark lack of descriptions. It's all bit and bytes these days. There's no reason for sparse information.

 

To be fair as Toyota techs, we also have to deal with parts numbers not matching even in our internal systems. For no f****** reason.

And no, nothing has changed on the manual V6 since the inception of the third gen. Carry on

 

I've seen better, I can't say I've seen worse (yet) although the Toyota stuff is not THAT bad. I've come from the Jeep, Ford, and Nissan worlds. Jeep I have a copy of the physical parts manual from 94-96. That thing is a freaking godsend, it's just page after page of exploded views and it lists parts by date/engine/trim. So if they started using a new part in mid 95, it lists the old and new and the dates they apply to. Very handy. Nissan was very similar to toyota, but much easier to get an accurate part number. Ford was different than all of them but I was always able to figure out everything.

I'm not sure I'm aware of the parts not matching problem. My main problem is that Toyota will tell me two different parts both fit, or between two very similar parts, one or neither fit, not both. For example, the cluster lens. There are two common part numbers floating around for those. The information for which cluster lens part number fits which year/trim is inconsistent across the various toyota parts sites. It is very frustrating.

I'll have to check out the link Dave posted for navigating the parts site. Usually I have no trouble with that specifically, the problems usually come up when I narrow it down a part, then there are 3 versions and I can't tell which one I need or what the differences are and then I enter my VIN (or try to choose a trim from the crazy trim list) and either all or none of them are marked as a proper fit.

 

Yeah. PDFs or similar with the whole vehicle in it are / were the best.

 

I have seen far worse parts and repair manuals in the commercial transport industry. One manual, I was looking for power steering info... the steering chapter said refer to the hydraulic chapter, the hydraulic chapter said to refer to the steering chapter

 

Did the delete this past weekend using @Firn's machined inner disk. All I can say is...holy shit what a difference. I was beginning to think that I was super rusty on driving a manual (been a few years), but I can safely say that it wasn't totally me that was the problem! Night and day, super happy with the results. Much thanks for everyone contributing to this thread, and to @Firn for a fantastic product!

 

Haha! I felt exactly the same way.

Thanks for the feedback, always good to know it's working for others!