kmn5

Just wondering,
what options are available on the W58 5speed?
can the gears be beefed up somehow?

What about the cryo freezing, it's supposed to strengthen the metal....
just wondering what else can be done besides going to the 6speed......

awj

r154? If you can afford to cryo a w58, you can afford a getrag.

dejacky

iTrader: (2)

surely there are some cheaper options to making the W58 5-speed transmission stronger and better able to handle more horsepower? The Getrag 6-speed transmissions are quite expensive for me . Anyone know of anyone "beefing up" their W58 transmissions?

96sc3

iTrader: (1)

i would also like to know

SCoupe

Curious to know what HP are you planning on laying into your W58-5speed with? They are supposed to handle upper 3's before getting into trouble in the 400's. Depends how you throw the power to it and your clutch to a limited extent.

/Aerostar\

iTrader: (2)

Short answer: No. This has been discussed alot on Supraforums and they have just realized that the W58 is a weak, weak tranny. You gotta be real careful with her, even with just daily driving

So your options are the R154 or the Getrag

SPORTcoupe

iTrader: (2)

Did these SupraForums geniuses happen to mention any other trannies found in 200HP cars that could handle over 400HP?
The W58 was way overbuilt for what it was meant to be used for: 200HP.
It could also be said that the 2JZ is a weak, weak motor, because it's internals have the tendancy to crumble above 1000rwhp.

It is in no way a weak tranny.

~Alan

rscott

Alan,
I think its just weak by dyno queen standards

In either case, the tranny becomes the limiting factor when shooting for higher horsepower applications. Sure, there are thousands of others, but some are more easily upgradable than others. The turbo project needs to be planned around the limits of the motor, fuel, engine bay and tranny. If any of those become the limiting factor, the project has to stop and be modified. If there were no room in the engine bay, there would be no turbo and the tranny wouldnt be an issue at all. If the motor were to stop making power at 400rwhp like under stock compression/fuel conditions, the tranny wouldnt be an issue. Its because the engine bay can fit a y2k in there and the motor can handle 1000+ rwhp that the tranny has to be considered.

in my opinion, 6speed is the way to be
if only i had money to afford one...

96sc3

iTrader: (1)

so far so good for me, except that slipping clutch, i think it all depends on how you drive and take car of it, don't shift the tranny like its the daytona USA arcade game, it needs to be gently shifted,..,

qtb33

I have had some questions about this as well for my old car. I emailed a cryo treating company and here is their response. For what it's worth:

"Thanks for your e-mail and interest in our Cryo Treatment. We have been successfully treating transmissions and rearends for many years including a 300% improvement in the life of the gears, shafts, and bearings of a 14,000 horsepower Modified Pulling Tractor powered by four turbine engines. Nothing broke, but after that many hooks they decided it might be best to finally replace everything with new Cryo Treated parts. We should treat all the parts of your disassembled tranny (gears, shafts, bearings, forks, and case) as well as your axle/CV-joints. We have treated axle/CV-joints for Import Dragracers with over 650 horsepower and increased the life from 6 passes to 40 passes (it broke on pass #41)……..not a bad improvement, a net gain of 566%. There is such a wide range in the size and weight of transmissions, rearends, and axles, that I had to determine a simple means of figuring the cost of the treatment, so we treat those parts for $2.50/per pound. Therefore, treating 100 pounds OF THOSE PARTS at $2.50/per pound = $250.00. Not bad “insurance” considering the cost of the parts. We have a minimum run charge of $75.00. That DOES NOT mean that we ad $75.00 to the treatment cost. IT MEANS THAT if the treatment totals less than $75.00 (for example, 20 pounds @ $2.50/per pound equals $50.00 BUT BECAUSE OF THE MINIMUM RUN, THE COST WILL BE $75.00. Why not also treat your disassembled engine ($450 for a 4-cylinder automotive engine and $562.50 for a 6-cylinder or 8-cylinder automotive engine, as the treatment normally results in an increase in horsepower of 2-6% along with reduced wear and breakage and much longer between rebuilds.

The demand for our treatment results in loading our Cryogenic processors (of which we have many) two times each week. We ask our customers to have their parts (cutting tools, engines, transmissions, rearends, axles, brake rotors and brake drums, turbochargers and superchargers, firearms, musical instruments, etc.) delivered to us by noon on either Tuesday or Friday as we load processors each Tuesday afternoon (the treatment of the Tuesday loads will be completed and shipped on Friday) and Friday afternoon (the treatment of the Friday loads will be completed and shipped on Tuesday). We are the oldest, largest commercial cryogenic company in the U.S. and look forward to treating for you. Thanks again.



Bob Reed, Motorsports Div. Mgr./Mining & Construction Specialist

300 Below, Inc.

2999 East Parkway Drive

Decatur, IL 62526

Phone: (800)550-2796

Fax: (217)423-3075"

I would like to point out I'm not saying everything they claim is true but I figure it's worth looking into. I have hear other good stories from RX-7 guys that have suffered from blown trannies and this seemed to help them.

Just my $0.02

SPORTcoupe

iTrader: (2)

Hmmm.....very interesting....
So would they take the whole tranny and just freeze it as-is, or would they take it apart, freeze the parts, and then put it back together?
Sounds very futuristic. =)

~Alan

reamemiya

iTrader: (1)

this process has acutally been going around for a while.

if i remember correctly...i think everythign is taken apart and cyoed individually then put back.

question is...how much do our tranny's weight?

qtb33

Yes it needs to be taken apart. You wouldn't need to do the entire thing. You would probably just want to do the input and out put shafts. As well as all of the gears themselves. This would also be a good chance to replace seals and syncros.

bags

A good guess for the tranny is 100 lbs, assembled. I'd do every part he suggested. Thanks for the info BTW

And cryo-treating has been around for a long time and is proven, when done correctly.

ummagawd

iTrader: (1)

throw in the cost of disassembling and then reassembling a tranny (don't forget the seals and stuff) and add that on top of the cost of cryo'ing....

anyone know?