DCT Transmission Build Project

[TheHouseWon]

Originally Posted by Used2be

Are you guys talking about a machined from billet engine block? I'd never heard of such a thing but watched some drag racing on TV and learned that Toyota has motors built that way, for nitro use I suppose. Did your path give you an estimated cost if we are talking a complete engine block? Does that sort of build allow for proper cooling? Streetable?

I thought the block was the last piece to go. Forged motor to is crabk, rods, and pistons. Billet motors are for serious race builds, essentially bullet proof.

[Used2be]

Originally Posted by allmotor_2000

Custom billet block is for the 2.5K-3K HP range. Some GTR guys have that. Probably a $100K plus build.

I think you'd be giving up taking the kids to school if you went that route! I suppose if I had the budget it'd be fun to push the absolute limits, but it'll never happen for me.

[allmotor_2000]

This is the wrong platform to spend that kind of money

[SSPKris]

Transmission heading into the shop for teardown.

[ur20v]

nice to see we have the metal DTC pan and not the plastic one fitted to the E90 DTC that cracks and leaks.

Are you going with the full SSP DTC deep pan and cooler?

[SSPKris]

We got the transmission into the shop over the weekend for complete teardown. These are a few pictures to show access to the transmission.



Front cover being removed to access the clutch assembly.


Draining excess oil from the clutch housing. As you can see this oil is rather dirty. This oil only has a few thousand miles on it. This is why we recommend to change your oil and filter every 25K.

[allmotor_2000]

Looking good so far!

[SSPKris]

Ready for transmission pan removal. These plastic pans are known to start leaking around the 30K range.

Factory pan magnet with a ton of gear debris on it. This is the scene you will see with the shift fork magnets. This is the material that gives the incorrect shifting codes.

Factory pick up filter for the transmission gear pump assembly.

[allmotor_2000]

Inevitable for everyone with this tranny even with milder mods to have the same issue - just a matter of time.

Good stuff Kris!

[kevn23]

I think my 4th is starting to slip a bit, but have to do more testing. This is waay sooner than I anticipated... Prob need upgrade the clutch.

[SSPKris]

Megatronic Unit. Computer for the transmission

Megatronic Unit removed to access the valve body assembly.

[allmotor_2000]

Now this is looking like Lego to me... glad its Kris @ SSP working on it!

[TheHouseWon]

Looking forward to seeing the results! The f10 will be well represented at Shift S3ctor.

[allmotor_2000]

Originally Posted by TheHouseWon

Looking forward to seeing the results! The f10 will be well represented at Shift S3ctor.

I am signed up for that Saturday...

[TrevorM3]

vids please.... omggg^

[M5Rlz]

Originally Posted by allmotor_2000

Like a few other people I also suffer from the Gearshift Rod 5-7 issue (not related to the clutch... rather something inherent in this transmission design). This is occurring on WOT 4th gear upshift to 5th gear where it throws a DTML and you effectively lose 5th gear until the engine is re-started. It is not fully clear what the root cause is, but there are theories.

That to me [Kris I'm sure knows the car and software better] sounds like some kind of failsafe when the gear might go or snap, where like on my car you make the power all motor is making, and its too aggressive for stock gears in the 800-1100wtrq range. The gears are just gonna snap and you'll lose it, not catastrophic but a mess for someone like Shep, Ivey, etc. to clean up.

Originally Posted by allmotor_2000

Custom billet block is for the 2.5K-3K HP range. Some GTR guys have that. Probably a $100K plus build.

I was getting ready to put another 70k into the car and told that was not enough. SO I'm stopping at 1700whp right around the safe zone for still reliable on a day to day basis, kinda like UGR cars that make 1800,1900,2k+ they are strictly event cars and privately those cars have issues, and are not "reliable".. Where as 700-1600 with the right parts from the right people and the car like mine you can daily drive in rain, snow, etc. and with the right tires hook in 19 degree weather on asphalt lol

Originally Posted by TheHouseWon

I thought the block was the last piece to go. Forged motor to is crabk, rods, and pistons. Billet motors are for serious race builds, essentially bullet proof.

Bullet proof no, EXTREMELY resilient yes. The ETS billet block from Willall Racing, lifted the head mid run into the 7s and the block was fine and showed no signs of damage.

That was the block I was going to order would have been 25k shipped + headwork, crank+gaskets, etc. so close to 50k to get it up and running and was going to go T4 top mounts for 2000whp+ but was told by various people my car running 8s now would go from day to day reliable [I have 15k miles on the build and only lost a cv bolt at 1090wtrq on e85, after 14,550 miles of use, so $300 bucks outta pocket]... TO extremely unreliable.


To continue to stay in front of your guys' fastest cars in a GTR is like 30-60k depending on parts, shop etc., costs have come down probably another 10k since even from when I did it last year, so its continuing to get more affordable, more reliable each year with R&D

[boots]

Originally Posted by allmotor_2000

Inevitable for everyone with this tranny even with milder mods to have the same issue - just a matter of time.

Good stuff Kris!

Brah!!! Don't even say that. Ok😡😡

[Drm5]

Originally Posted by boots

Brah!!! Don't even say that. Ok😡😡

agreed!!! with boot .... shhhhh

[allmotor_2000]

Originally Posted by boots

Brah!!! Don't even say that. Ok😡😡

Gonna happen... others see the rod 5-7 error even with no mods! Only precaution I suggest is what Kris said - change the oil often

[boots]

Well guess I'm lucky then since I've got about 3k in my new ssp900 clutch

[SSPKris]

The debris will become a huge issue in high mileage cars in the future. Lack of maintenance on these transmissions will result in large repair bills. Its a time consuming job to clean these shift forks properly.

SSP

[SSPKris]

Valve body assembly


Shift solenoids

See all the metallic debris on the shift solenoids. This covers the entire inside of the transmission and requires major cleaning.