layshaft bearing

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layshaft bearing

Postby woodstok on Wed, 10 Feb 2010 1:59 +0000

ok, its finally happened. toyota has my gearbox out in a zillion bits. they tell me all gears but 4th are very noisy(like i didnt know that!) there are lots of guys looking at the bits scratchng their heads. apparently the layshaft bearing is stuffed and more than likely the synchros too. truck has done 106000 kms. if toyota wont pay for this im gonna lose it big time. yep this is the same one as the "noisy box" thread, and has been ongoing for about two years. we wont go back there guys! what id like to know is, what is a layshaft bearing and any ideas why it would crap out so soon. no i dont tow in 5th. yes i service regular as. meanwhile we wait for the high up mechanic dudes to speak from on high with a verdict. whats up with mechanics these days?
Last edited by woodstok on Wed, 10 Feb 2010 2:56 +0000, edited 1 time in total.
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Re: layshaft bearing

Postby Hilux Max on Wed, 10 Feb 2010 2:06 +0000

Lay-shaft? WTF?

First Ive heard of it...is there another name it goes by?
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Re: layshaft bearing

Postby Batman on Wed, 10 Feb 2010 2:15 +0000

From memory the layshaft is the one that meshes with the main drive shaft to allow the gears to change, I need a picture so I can explain it properly, I will get on to google and see if I can find one...may also be known as the countershaft but not sure
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Re: layshaft bearing

Postby oldrev on Wed, 10 Feb 2010 3:30 +0000

ok in a ford gearbox from years back the layshaft is in the other gear cluster that meshes with the main gear cluster in the bottom of the box
back in them times the layshaft used to run on a series of needles roller sets about four sets
dead set arse to replace
i've had a few extras so dont crucifie me ok
cheers
ken
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Re: layshaft bearing

Postby woodstok on Thu, 11 Feb 2010 3:50 +0000

ok guys, looks like it can also be called the input shaft. we are no further ahead today with toyota. after googling the problem, a uk site says "vigo is prone to splitting transmission layshaft bearings between 20 and 80 thou kms. this is an expensive repair". unquote. no shit. hope im not payin. new ford ranger lookin ok now.
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Re: layshaft bearing

Postby oldrev on Thu, 11 Feb 2010 4:44 +0000

i'm a little bewildered by this problem
the layshaft goes through the laygear which is a solid cluster from front to back in the bottom of the box normally
i find it hard to believe the gearbox needs a rebuild after 100k
i've flogged the piss and pickhandles outta mine had one gearstick replaced and one clutch replaced.
i;ve clashed a few changes through the change being too quick and so .
the one thing i can say without doubt is when my clutch was done at about 90k that either the thrust race or the spigot bearing was absolutely shagged cos is was a whole lot quieter when i got it back which i told the dealer same
maybe the diagnosis is not right ?
just my2cs worth
ken
thought i better say mine has 140k on the clock
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Re: layshaft bearing

Postby woodstok on Fri, 12 Feb 2010 3:50 +0000

hey is doug67 still around, when i first started this thread a couple of years back he knew of an input shaft crappin out, but no details. maybe hes got some now. see gearbox whine,5th gear whine threads. oh and to you oldrev,, excuse my kiwi ignorance but does "dead set arse to replace" mean its easy or hard to do?!
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Re: layshaft bearing

Postby oldrev on Fri, 12 Feb 2010 4:37 +0000

afirmative!!!!!!!!!!!
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Re: layshaft bearing

Postby rodw on Sat, 13 Feb 2010 4:20 +0000

oldrev wrote:afirmative!!!!!!!!!!!


You are such a helpful chap sometimes Ken :D
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Re: layshaft bearing

Postby Gulfstream8 on Sat, 13 Feb 2010 1:29 +0000

The “Lay shaft” is simply the input shaft or the “main shaft” in your gear box. The bearing at the front of your gear box and the rear of the box experience the most stress. Toyota has been using the R157 and R154 gear box for over 25 years now and the R157 can be found in the early model Toyota Supras. The only common problem I have found with this box is over “torque-in” it by loading up the gears and labouring the engine; for example pulling very low RPM in tall gears, you will hear a growing sound coming from the box (you have said you have never done this).

The R157 and R154 does not like to be driven in 5th gear at speeds below 70klm, it will cause the box to flex ever so slightly placing unnecessary strain on the “Lay shaft” bearings. The other problem is the service centres using poor quality oil. And lastly the only other problem is a manufacturing fault with a poor quality bearing; unfortunately the one thing the Japanese manufactures still cannot get right is knowing how to make good quality hardened steel. You will have to fight Toyota to get this box fixed but please don’t believe the crap that is gearbox is week as I built a 500hp Supra that ran a R157 gearbox and I never had a problem. Oh and Im sure someone will say something like” what about torque as diesels produce heaps of torque”, my Supra was developing a whopping 500 plus Newton meters of torque. Like I said this is a tuff gearbox.
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Re: layshaft bearing

Postby RACECAM on Sun, 14 Feb 2010 10:18 +0000

dosent supprise me the smallest, it would appear to me that toyota has dropped the ball on bearring quality since moving to thailand if i had to rely on hilux diff and gearbox rebuilds a few years ago id be broke, but over the last few years as the thai built ones get a bit older gee i do heaps, 2wd, 4wd a motor combos and the number 1 problem is dead bearings, the clustsers, mainshafts, and most input shafts are ok but bearings are loosing their hardening, maybe a diff manufacturer or poorer steel i dont know

just my 2c
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Re: layshaft bearing

Postby woodstok on Mon, 15 Feb 2010 2:21 +0000

thanks guys, very interesting. well toyota have decided that toyota nz, the dealer, and me will go thirds in the repairs. at over $2700 nz dollars (split three ways tho) its not that cheap. ive had a gutsful and have told them go for it. i will never buy another hilux manual box. the gearing is just so wrong for this motor and my work. 5 speed auto has been good here in nz. the truck will be back on thursday and i will post exactly what has been done, but basically its a recon box at 106000kms. unbreakable!
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Re: layshaft bearing

Postby woodstok on Mon, 22 Feb 2010 2:31 +0000

its back.two bloody weeks of drivin a toyota echo courtesy car! every bearing from input to output has been replaced. small bearing that you see as soon as transfer case is removed was totally shagged. thrust bearing also replaced (again) . toyota ripped the vinyl floor covering (sr) so will have to find time for them to replace that now. much quieter in cab, smooth gear changes and no missing gears when changing. this truck will never see the inside of a toyota dealer again. went straight home and did the 106000km service myself. we can get terrain tamer stuff here now! hope this never happens to you guys and thanks for the input.
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Re: layshaft bearing

Postby kumarsan on Mon, 19 Aug 2019 5:38 +0000

It is helpful to know about layshaft bearing.
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Re: layshaft bearing

Postby taresk on Mon, 19 Aug 2019 5:53 +0000

woodstok wrote:does "dead set arse to replace" mean its easy or hard to do?!


Really difficult
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