W58 Version Comparisons

[wilbo666]

Actually cuzzo it is a gearbox code. used in 4wds generally.

if it was a diff code it would have 3 numbers ie G342 etc

As said G54 is the gearbox code

Cheers
Wilbo

[Cuzzo]

yeah sorry guys.

[timtiminy]

has anyone had any experience with using a heavy duty input shaft bearing on the W58 tranny? i have heard reports that this is the actual problem of why they go out and if this bearing is changed out for a tougher one the tranny can hold quite a bit of power. ive searched google for w58 maxi hd input bearing and it comes up on another forum, just wanted to hear from you guys...

[DX20VT]

h just wanted to hear from you guys...

We tried new bearings in one of my boxes ( a steel centred one)
and it lasted no better than the others.
and after the broken box was dismantled there was still no movement in the bearing
making me believe that it's not a bearing problem and the best and biggest bearing in the world will not fix the issue.

IMO there would have to be a fair bit of movement in the bearing for it to let the two shafts move apart far enough to cause the gears to strip.
it would only take a small amount of a mm, but you'd notice that much movement in the bearing if you checked it properly.

Anyway I've got a gearset on the way as it will be cheper in the long run than breaking boxes or running lower boost.

[Draven]

Timmy.. you sure you're not thinking of the R154? They're well known for a weak input shaft/bearing

[cambelt]

You can buy the 3 main bearing in the W boxes in a heavy duty , they have no cage and are full of balls so much more load carrying ability . They were $90 each 8 years ago .
If you can stop the gears from spreading apart in any way shape or form the box will handle more power and last longer , hence the reason toyota went to a steel plate.
Dave

[timtiminy]

No its the W58 im talking about... taken from; http://forums.turbobricks.com/showthread.php?t=388

I can confirm the power handleing of the W58. I have been running one in my 82 Jaguar XJS V12 for ther last 5 years. The car weighs over 4000lbs and has 300HP/300ft'lb of torque. Only mod I did as recommended by lots of W58 users out there was to change out the input bearing for a "maxi" bearing. basically a HD bearing that uses twice the number of ball bearings as the standard W58 bearing which more evenly distributes side loads.
I made my decision to go W58 after speaking to a guy in Calgary, who was running 450HP through a heavily modified Supra with his stock W58.
W58 has a nice compact case that fits in most tunnels and is pretty cheap and avalable. I bought my W58 from a wrecker for $125CDN and other than the input bearing, it is stock and has held up nicely to abuse.
I used a clutch disk from a Toyota commercial truck and a hi performance pressure plate from a Australian HSV. Dellow and Ron Moore are pretty good to deal with.

The supra tranny has no problem taking abuse from a motor produceing in upwards of 700ft pound of torque. Orin Bivens is currently running one in his 1992 turbo supra and it just made 3 ten seconds passes in a mk3 supra that weighs 3500 pounds. He says he uses 30 weight oil in it to help it last. I have had three mk3 supras, never had any problems with the w58. Ive personally run 20/24 psi out of them and the tranny holds wonderfully with upgraded turbo and haltech and a ton of other mods.
American power and Brake(napa) in Irving Texas makes clutches/pressure plate, that hold 600 foot pound of torque for these trannies for $250-ask for "mudflap" .They also made some hi po clutches for Jason Goodley and i when we ran the 244ti with haltechs and major boost on the m46's for the same price-but the trannys wouldnt ever hold up.Call info for the phone number.They major in heavy industry clutches for semis but dont mind building hi po street car clutches for very inexpensive and very high quality.

Kris Weldy

[JustenGT8]

I found it was the layshaft bearing that was the weak link but similar loads on the main shaft as well i guess. Replacing the spherical roller bearing with a needle roller bearing on the layshaft seems to fix issue up to a certain hp as they can take a much greater end load.

Beyond that it was plain gear strength not being up to the task.

[DX20VT]

Beyond that it was plain gear strength not being up to the task.

Yes.

May car on 18 psi makes 400hp atw and 300ft'lb of torque,
and the gearbox's lasted for over 2 years worth of races,

Same spec box's at 20 psi with 450hp atw and 360ft'lb of torque,
and the box's last 2 1/2 races which is less than 30 mins.

So i ended up using high boost for one lap in qualifying each event, and
for short bursts in 4th gear during events as 4th gear is stronger as there are no teeth to break.

[JustenGT8]

Yes.

May car on 18 psi makes 400hp atw and 300ft'lb of torque,
and the gearbox's lasted for over 2 years worth of races,

Same spec box's at 20 psi with 450hp atw and 360ft'lb of torque,
and the box's last 2 1/2 races which is less than 30 mins.

So i ended up using high boost for one lap in qualifying each event, and
for short bursts in 4th gear during events as 4th gear is stronger as there are no teeth to break.

Pretty much the same torque at what mine let go at

[DX20VT]

Pretty much the same torque at what mine let go at

First box we broke just after we had been back to the dyno for the higher boost tune,
we thought maybe old age as it had done a bit,

but broke one again next event, thought, hmmm, maybe a dud,
broke another again, and so backed off the boost and the next one lasted the season out.

I can afford to loose the extra power, especially as I have plans and parts ready to make more,
as I can only just keep up with the best of the GTR's now.

[timtiminy]

I found it was the layshaft bearing that was the weak link but similar loads on the main shaft as well i guess. Replacing the spherical roller bearing with a needle roller bearing on the layshaft seems to fix issue up to a certain hp as they can take a much greater end load.

Beyond that it was plain gear strength not being up to the task.

do you have a part number on this layshaft bearing? I have yet to get any info on the other heavy duty bearings... perhaps switching all the bearings out would help make this tranny stand up to big power...

[JustenGT8]

Sorry mate, years and years since i played with this gear. Just take the bearing into any decent bearing shop and ask for the equiv in a needle roller...that's all i did and they had it in stock for bugger all $$$

[timtiminy]

after reading around i guess there is a BMW bearing that works... ill have to do what you said though... My brother in law works for a place that has an account with Timken so i might have to ask him too...

[rodi]

my motor puts out 347hp 520ft lbs so very torquey i have on my floor 1 remote shift supra steel plate, pulled out cos noisy in 1 2 3, 1 w56 steel plate same 1 steel plate w58 stripped 3rd. w58 still in the car, i don,t think it has anything to do with the plate cos the gear they break is 200mm away from it, i think the problem will be a combination front bearing lay shaft bearings and the bearing between input and main shaft, also imput shaft flexing, i,m in the process of getting the imput shaft ground out to accept a high load bearing instead of the std needle rollers+ high load bearings in the rest, soon let you know