Bmw 6 speed box

Has anybody done the gyrodrift bmw 6 speed gearbox conversion

JamieP is using one on his E46 build.

there is a 1jz soarer near me running the kit and box and he says its good. and about 4 supras i have seen with this kit fitted. i will be going the same way when i blow up my w58

Is this the 530d box? Been trying to find out info on this, lots of people seem to be doing it and they are good for like 800bhp from what I've read?

I'm also trying to find out which box works and which box is the best

I would be looking into a Tremec T56 Magnum, BMW gearbox's are OK for dirft cars , they are not designed to put down torque like a road car ; just want to spin up the rear.

They wont handle the power like a V160

http://www.rodshop.com.au/index.php/bellhousings/toyota-1uzfe/toyota-1jz-2jz-1uz-2uz-3uz-adaptor-plate-tremec-t56-6-speed.html

http://www.ebay.com/itm/NEW-TUET8592-T-56-MAGNUM-TR6060-TREMEC-6-Speed-Transmission-/162067690832?hash=item25bbfcb550:g:qrYAAOSwWntXM4sg&vxp=mtr

http://www.grannasracing.com/blogs/news/71490757-tremec-t56-magnum-6060-supra-2jz-swap

http://www.grannasracing.com/collections/drivetrain/products/gr700-t56-magnum-swap-kit-mkiv-2jz?variant=17017604165

THE BIG PROBLEM

The V160 is discontinued, and now so are most of the parts. Even the synchronizer hubs, which is a common wear part for anyone that has one of these transmissions. So now what do we do? Well, we all need a replacement.

THE GOAL

Dare I say it, get a better transmission than the Getrag V160!? The goal is to get better power handling, quicker/smoother shifts, and get this trans to fit up perfectly so its a bolt-on affair. There are some hurdles right now to make this happen, but that is my mission, to provide the Supra/2JZ community with a valid replacement for the V160 that just may no longer be tenable due to lack of parts and availability. If everything works as expected I will sell this setup with bellhousing, transmission mount, billet shifter relocation, and possibly the driveshaft as well.

POWER HANDLING

So here it is, the best possible replacement for the V160. This transmission is called the Tremec T56 Magnum in the aftermarket realm. In production it is referred to as the TR-6060, which is the factory transmission in the C6 corvettes, and 2010+ Camaros, and some Mustangs. This thing is a monster! It's rated at 700 foot pounds of torque capacity. The V160 was only rated at 375 foot pounds, which many have proven that rating wrong, but it gives me high hopes for this transmissions capability.

The shift throws are ultra-short, and super smooth. This transmission seems to really be a viable V160 replacement.

SHIFTER

This is one of the hurdles I will have to overcome. The shifter location is not ideal, all of the Magnum trans offerings shift locations do not mate up well to the supra location. Therefore, I am working on a billet shifter relocation.

CLUTCH

Right now, I have only researched the Tilton clutch. Those of you who have a tilton carbon or other multiplate 7.25" clutch will we able to swap to this transmission with inexpensive hub change and new throw-out bearing. I will provide part numbers to anyone who is interested in the swap kit.

DRIVESHAFT

This should be the easiest part, and also one of the best features. The output of the T56 Magnum is a spline shaft, therefore it takes a simple slip yoke to attach. Those that have experience with the V160 Driveshaft Shop aluminum adapter setup will be happy to hear this. I absolutely hate that adapter, and will welcome a slip yoke with open arms!

GEARING

The only downside to this transmission that I have found is the gearing is quite different than the V160. Compare the available gear ratios in the chart below. Notice that the V160 is 1:1 in 5th, where as the T56 Magnum is 1:1 in 4th. This is because the most of the domestic side cars run a lower/shorter rear gear, they have more torque at lower rpm because of their V8 engines. So for us, to really take advantage of this transmission would require changing the rear gear. For those that have the 9" rear in the car, this is a non-issue, but for the stock rear guys this will be a hurdle to overcome as no one makes aftermarket gears.

V160 Gearing Tremec Wide Ratio Tremec Close Ratio

1st 3.827 2.97 2.66

2nd 2.360 2.10 1.78

3rd 1.685 1.46 1.30

4th 1.312 1:1 1:1

5th 1:1 .74 .80

6th .793 .5 .62

For my car I went with the close ratio, as the gearing is most similar to the V160 when combined with the proper final drive ratio (rear gear).

ELECTRONICS

The T56 Magnum has dual speed sensors. I have not yet to put the time into researching adapting this to the toyota speedometer but I am sure it will achievable.

THE COST

So the question on everyone's mind here is probably cost. It will be less than a V160. The transmission itself is around $3000. The bellhousing is around $650. So, shifter is yet to be determined but it will be a pretty trick billet unit, with dual ball-in-socket joints. I would estimate around $750 on the shifter, and maybe $250 for the transmission mount. So more than likely right around $4700. Driveshaft and electronics would be additional options.

FINAL WORDS

I cannot say for sure at this point whether or not this is going to be the end all solution, whether it's all going to work, and whether this trans will get me closer to my goals, but it sure does seem like it. It's going to take a decent amount of custom work to get this to be a "kit" but I think it will be worth it for all of us. Stay tuned for more info as I progress on this build.

Also don't expect me to give away every detail of this setup. My time and investment into this is not free. So if you don't like that I won't give you every piece of information I worked to get, then just go ahead and do this yourself. Take the risk! Buy a transmission hoping it will work... then make the parts and do the work to get it to fit.

Ive been researching it for months

They work and work well, the diesel boxes are known to take serious punishment people running 1000+nm in other countries even in road cars and having spoken to GyroDrift on the phone they are very clued up and offer drive in drive out services too, you really need to choose the box carefully though

The problem is the gearing

From what ive read the e46 m3 box is the the best choice as ratios are almost bang on and the diff ratio pretty much matches a TT auto lsd but i believe its one of the "weaker" bmw boxes out there

Ratios dont matter too much in a drift car as it will rarely get above 100mph anyway so they use any box probably diesel boxes, they probably favour the increased acceleration, on a road car it wouldnt be very nice doing 70mph on a motorway at 5k rpm

With that all said im still going a different route with mine

I've still yet to see anyone using this setup sucessfully in a road car

Ive been researching it for months

 

They work and work well, the diesel boxes are known to take serious punishment people running 1000+nm in other countries even in road cars and having spoken to GyroDrift on the phone they are very clued up and offer drive in drive out services too, you really need to choose the box carefully though

Just from talking to BMW Diesel owners , they said an issue when their car is re-mapped; torque goes through the roof especially on the 3.0 liter variant

The weak point is the gearbox , mapped to where the engine could sit happily, the gearbox will last weeks with the torque wound up

I would hesitate to say an M3 box will not last too long at BPU power , M3's are known for gearbox issues, hence why ebay is flooded with them and conversions like this have soared in popularity, driving this conversion through the drift community has its caveats. They will look upon a gearbox as a consumable especially if they are getting them on ebay for a few hundred , not something you want in your road car. There is also a quick buck to be made to finance their car, I find the attitude within the drift community is, "How fast can I go and how cheap can I do it"; does some what make sense when you are trying to make a car do the complete opposite of what it was designed to do

The main reservation I have, there is no high production BMW model putting down the power of a single conversion; you are getting into unknown territory with a gearbox that was not designed to take abuse and hold all this torque , plus BMW parts are $$$$ when things go wrong

What I like about the Tremec , it is mass produced (Parts are easily available and low cost) , Gearbox is used in multiple GM halo cars , market is flooded with these boxes, designed for high torque, huge 3rd party/aftermarket development/resources , Gear change is smooth, you do not need to modify the Transmission tunnel

The initial outlay may be a little more expensive but you will have piece of mind it will handle anything you throw at it

As soon as one person starts running a Tremec in the Drift series , as usual they will all follow like sheep ; similar to what is happening with running LS engines