yeah sorry guys.
As said G54 is the gearbox codeOriginally Posted by The Real Roadrunner
Cheers
Wilbo
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...
We tried new bearings in one of my boxes ( a steel centred one)Originally Posted by timtiminy
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.
- KE70 Corolla Dx -
- 500hp+ 7AGTE 20V turbo -
- MRS/Hayabusa turbo **sold**
- TA63 3TGTE project in the build -
Timmy.. you sure you're not thinking of the R154? They're well known for a weak input shaft/bearing
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
No its the W58 im talking about... taken from; http://forums.turbobricks.com/showthread.php?t=388
Originally Posted by HRPufNStuf
Originally Posted by haltechsupra
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.
Lily Simpson 6.7.2010
R.I.P.
Yes.Originally Posted by JustenGT8
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.
- KE70 Corolla Dx -
- 500hp+ 7AGTE 20V turbo -
- MRS/Hayabusa turbo **sold**
- TA63 3TGTE project in the build -
Pretty much the same torque at what mine let go atOriginally Posted by DX20VT
Lily Simpson 6.7.2010
R.I.P.
First box we broke just after we had been back to the dyno for the higher boost tune,Originally Posted by JustenGT8
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.
- KE70 Corolla Dx -
- 500hp+ 7AGTE 20V turbo -
- MRS/Hayabusa turbo **sold**
- TA63 3TGTE project in the build -
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...Originally Posted by 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 $$$
Lily Simpson 6.7.2010
R.I.P.
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...
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
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