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Location:
Lost in the K hole
Registered:
May 2002
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 Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 04:21
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I seem to have a problem with my w58 'crunching' heavy 2nd to 3rd upshifts, almost exclusively when at high rpm exiting a decent corner, when upshiting into the straight.
its like the 3rd syncro isnt working, and the teeth go BBBRRRRRRRRR against each other before catching and clunking into gear. like a missed shift, but i KNOW the clutch is properly disengaged.
now before anyone has a crack about some stupid granny shifting, or my ill co-ordinated unko style, i can happily say ITS NOT ME! i originally thought i mustve been a little too eager on the stick and was hitting the shift early, but ive been VERY creful to make sure the clutch is fully disengaged before trying to punch 3rd, and its STILL happens.
the interesting thing is solid shifts in a straight line are fine. i never have issues with the box other than when heavy cornering and really pushing the rpm in 2nd before the shift.
is it perhaps the box fluid sloshing around during a corner? what can i do to help avoid this?
suggestions to different box fluid? fluid levels? over fill it a bit? additives? add a bit of auto trans fluid (heared that once somewhere).
its a mkiv supra w58 in top nick, i dont think it should be doing this. any suggestions would be appreciated.
cheers
ed
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Location:
Adelaide
Registered:
September 2003
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 04:29
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I'd assume that all of the shifter bushings are OK, so then it probably will fall down into the area of shift fork or damaged/worn synchro.
Did this suddenly start happening, or slowly get worse ?
At high revs, if you shift slow, and all other situations, is the shift OK ?
To see if it is the synchro, drain the oil and see if there are brass style silt in there 
Cheers
Michael B
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Location:
Brisbane
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 04:37
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The fact that it happens at high rpm only points to worn synchros. Pretty common on older W58's. Solution: rebuild box, or even better, get a late-model W58 with double-row synchros on 2nd and 3rd. Quick-shifting goodness!
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 04:42
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This is the noisy box Ed? The one that came out of the JZA80 that flipped eleventy billion times one night?
Synchros is what it sounds like.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 05:07
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| Norbie wrote on Fri, 13 August 2004 14:37 |
The fact that it happens at high rpm only points to worn synchros. Pretty common on older W58's. Solution: rebuild box, or even better, get a late-model W58 with double-row synchros on 2nd and 3rd. Quick-shifting goodness!
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its IS a late model box. reasonably low km's too.
and also, yeah, hapens at high RPM but ONLY when cornering... NEVER when shifting hard along a straight.
and dave: yeah, its the box that flipped eleventy billion times, but its not noisy. that was me having the tailshaft centre bearing installed upside down 
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Location:
Brisbane
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 06:20
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LMAO!
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 06:35
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| Quote: |
Why am I crunching 2nd to 3rd gear ??
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cos u iz da massifzt dong!
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Location:
Brisbane
Registered:
February 2003
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 06:55
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is the gbox oil level low? and it is sloshing to one side, thats why it only happens when cornering?
Just an idea.
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Registered:
May 2004
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 09:54
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See thread titled 'Old abused W58' for lubricant suggestions to soothe those syncros.
Otherwise check clutch disengagement, oil level.
Robert
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Location:
On your mum!
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 10:03
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Ed, when cornering at massif G forses you is prolly forgetting to be depressing the pedal on the far left.
I am liking low oil or too high, or viscosity too high or that you simply cannot drive.
Maybe the innards are still upside down? they may have flipped eleventy billion and one half times.
Solution = boost + auto
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Fri, 13 August 2004 10:20
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yeah, maybe i need to get me one of them G-Suits that them fighter pilot hero guys wear... give me massif powah in my legs for punching dem well-'ardcore gears without losing consciousness
ill have a look and see what oil i can get over the weekend, do a change and see what happens. a little birdy has suggested MTX80 race motorbike box oil with ye-olde nulon teflon additive...
anyone have thoughts on royal purple oils?
cheers
ed
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Sat, 14 August 2004 06:02
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ask Rod about Royal Purple.
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Sat, 14 August 2004 08:19
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munch mucnh syncros for lunch
rebuild! upgrade! bigger faster stronger !
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Sat, 14 August 2004 11:38
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if it is a fubar synchro - how the hell did i kill it so quickly???
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Why am I crunching 2nd to 3rd gear ??
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Sat, 14 August 2004 11:51
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its a second hand box right ?
was it rebuilt or chuckled in ?
the prevous flipcar owner coulda got it to just about dead phase before you bought it
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Location:
Lost in the K hole
Registered:
May 2002
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