Gearbox question
Discussion
Hi all, quick question but I've noticed on a couple of occasions when changing down from 3rd to 2nd on the 390SE that I can feel a slight catching of gear teeth as I cross the gate. It's not a crunch but I can feel the gear teeth slowly catching. It's only happened a few times but wondering what it can be? Also when I select reverse again on occasions the box crunches. If I go from second to reverse all is sweet and if I clutch down and wait for 10 seconds then also all sweet.
I'm intending to give the box a full "Adam flush" and Mobil 1 and Molyslip treatment, however it did have new oil in it earlier in the year when the gearbox seals were replaced.
Anyone have any clues as to the reason? Cheers.
I'm intending to give the box a full "Adam flush" and Mobil 1 and Molyslip treatment, however it did have new oil in it earlier in the year when the gearbox seals were replaced.
Anyone have any clues as to the reason? Cheers.
To me, your description of the symptoms sounds like preliminary signs of the clutch cover and plate springs starting to fail. Normally it starts with difficulty in engaging reverse and then crashing on the down change. If it is that, it will last a long time yet. If you have had a clutch fitted recently, it could still fail, especially if it was fitted with a poor quality clutch.
Tony. TCB.
Tony. TCB.
Yeah, if clutch isn't quite disengaging all the time, you'll get a slight crunch between gear changes. If reverse crunches from full standstill then it's probably a clutch 'drag' type problem (not disengaging or stiff/siezed spigot bush).
If it's not happening when stood still, it could also be a worn sychro ring, but this will happen going up and down gears.
I would check clutch mcyl (etc) is working properly first.
If it's not happening when stood still, it could also be a worn sychro ring, but this will happen going up and down gears.
I would check clutch mcyl (etc) is working properly first.
Convert said:
I'm with Ian, mine did this. Changing the bushes for Poly fixed it.
Thanks for the replies. Given the type of noise and "feel" of the vibration, rubbing on the prop might be it. I'll get it up on the ramps and have a good pull on the remote to see how saggy the bushes are. Cheers.KKson said:
Convert said:
I'm with Ian, mine did this. Changing the bushes for Poly fixed it.
Thanks for the replies. Given the type of noise and "feel" of the vibration, rubbing on the prop might be it. I'll get it up on the ramps and have a good pull on the remote to see how saggy the bushes are. Cheers.gmw9666 said:
In the process of doing my box and I had a bush question. Poly better than rubber I get but why don't we solid mount the remote? Would there be any issues to this?
Probably just slightly more noise in the cabin via the gear stick. More positive shift though I would think.Pete
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