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G50 help/advice please

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I appear to have broken my car a little bit ... good news is that at least it was injured in action [:D]

Here's what happened - at V.Max on sunday at the end of the main straight I braked down and when I went to change gear ( I cannot remember whether it was my first change in to 4th or second change into 3rd) I got this "crunch"!

First thought was that I'd missed a gear, so I tried again, same "crunch" ... through every gear!

I pulled over and could not get Reverse, 1, 3 or 5, all at the top of the gate. Manged to get 4th and trundled back round to the start.

Andy Fearnes kindly had a play with it once it had cooled down and the general concensus was that the clutch had simply got so hot in the high temp (32 degrees) and combined with the heavy use, it was sticking (can't remember the exact words Andy used).

However, I can now get all the gears except 3rd, which goes in, but only with a slight "crunch" (the sound you get if you sometimes don't depress the clutch properly, don't know how else to describe it except crunch!).

After a couple of discussions my thoughts are erring towards a worn or (most likely!) slightly bent gear selector dog. I don't think it is the clutch as all the other gears apart from 3rd seem top be ok. The gearbox seems to be generally in pretty fine fettle with no untoward slippage or noises.

1) Does anyone have any other thoughts on what the damage might be (is there an obvious one?)

2) If I need the gearbox out to be overhauled (G50) are there any improvements I can have done, such as a short shift kit as on the 915 box?

3) Does anyone know the best place in either Manchester or Leeds to do such a job?

4) Is it likely to be horrendously expensive?!!!

Any thoughts appreciated :)
 
I have never worked on a G50 but it sounds like you have messed up the syncromesh. New dog teeth (sync. hub), sync ring, and slider. Gasket and seal kit.

I notice that the parts for the G50 are more expensive than the 915...

Ouch, I see that you cannot buy the dog teeth/sync. hubs. You have to buy a whole new gear set...

Is this right ? Can they purchased anywhere else or is that they cannot be removed ?

http://www.pelicanparts.com/catalog/shopcart/911M/POR_911M_Transm_pg1.htm

Oh, a gear set at an OPC for the 915 was £1200 a few years back...
 
Thanks Nathan.

From all the symptoms, and the fact that all other gears are fine, it seems to be one of the bits that moves the gears into place on third is just quite not moving the cog far enough over, hence the slight crunch. from this it does seem to be either one of the selector dogs or maybe fork which is very slightly bent.

It's going into Strasse on Saturday anyway so hopefully they will be able to sort out the problem :)
 
Please let us know the outcome.

People say that the selector forks can become bent in a 915 but I can't really see how it would happen in a 915. The driver would have to be very strong to bend them in a 915. Not sure how strong they are in the G50 compared to the 915.
 

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