Author Topic: Gearbox shot.  (Read 6167 times)

sparky Paul

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Re: Gearbox shot.
« Reply #75 on: December 12, 2017, 06:57:47 PM »
If a thrashing quietened it down, I think I might be poking a bit of wire in the level hole.

It's not that unusual to lose small amounts of oil over longer periods via lipseals and not notice any wet, especially when bearings are getting a bit worn.

TG

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Re: Gearbox shot.
« Reply #76 on: December 12, 2017, 09:13:49 PM »
When I changed my gearbox oil at ~100k (garage did it at ~70k) it had quite a bit of fine non-metallic bits in it, a lot smaller than sand but bigger than flour. Same sound after the change but more slick between 1st & 2nd, I gave it a before and after recording with a spectrum analyser on the phone to see if there was a difference, it wasn't noticeable.  In theory I could compare this to see if the input shaft bearing has got noisy over the year.  Just held the phone case against the gearbox shell, I was going to subtract the declutched sample from the neutral one but that was too much effort.
--
TG

sparky Paul

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Re: Gearbox shot.
« Reply #77 on: December 12, 2017, 11:20:36 PM »
Interesting stuff!

Most noisy ball bearings are due to pitting of the outer raceway - once they are damaged, that's it. The only saving grace is that they can run for years making this noise.

Jocko

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Re: Gearbox shot.
« Reply #78 on: December 13, 2017, 07:00:01 AM »
The only saving grace is that they can run for years making this noise.
My hope entirely!

culzean

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Re: Gearbox shot.
« Reply #79 on: December 13, 2017, 09:05:11 AM »
Interesting stuff!

Most noisy ball bearings are due to pitting of the outer raceway - once they are damaged, that's it. The only saving grace is that they can run for years making this noise.

Agree,  when my mechanic mate did my wifes GD box he showed me the bearing that had 'failed' - only one is affected.  When he spun it it spun very freely with the very faintest of noises' of course when under load and mounted in gearbox casing that noise would be amplified a lot.   He broke it open and could see the faint scuff and pits in the race.
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

Jocko

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Re: Gearbox shot.
« Reply #80 on: January 12, 2018, 06:55:31 AM »
Noise from the gearbox is getting embarrassingly loud, outside car. I will have to do something about it. Sitting inside, with the car in neutral and the engine ticking over, you have to raise your voice to have a conversation!

degzi

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Re: Gearbox shot.
« Reply #81 on: January 12, 2018, 10:54:36 AM »
I have never been much for keeping up with the Jones'. Evidence my Nokia "Thick" phone and my small TV. I shop by need rather than want, but it hasn't always been a delight to the women in my life! I don't consider myself tight (I never have two cents to rub together), and since I retired it has become more pressing not to waste money.
Yesterday, when my wife remarked on the gearbox, she asked about repairing it.( I pointed out that I could buy something else cheaper than repairing this one). Look on the bright side though, all of the comments I have read about the bearing failure say the gearbox will run forever like that, and until proven otherwise, that is my stratagem.
Just turn radio up lol or get it sorted

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330+ vat to remove rebuild replace in Glasgow
I paid that including VAT and Borg bec clutch in Wakefield

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Where's the place in Wakefield. ? I used to live down that way, might have to have a trip down when mine gets worse. Does he do day turn around.

Jocko

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Re: Gearbox shot.
« Reply #82 on: January 12, 2018, 02:50:29 PM »
I popped in to a couple of local garages today, to see about gearbox repair. The first guy I went to declined quoting, as he has only one ramp and couldn't tie it up while gearbox was out. The second was a bigger garage (part of a small local chain). The mechanic I spoke to is ex Honda and told me that the last one they did cost "around 900" and was only that cheap because he replaced the bearings himself. For non Honda gearboxes they send them "down south", to a specialist repairer, and that puts the price over 1000. I think I will be availing myself of the services of Top Gear, in Rutherglen. It is a bit inconvenient for me, but I could get a taxi to run me back after dropping off, then again to pick it up, and still be well in pocket. As it is I will just have to bus it! Top Gear's quote, 260 + VAT in car, 180 + VAT out of car. I'll arrange it as soon as I have a free space, time-wise (when I don't NEED car).

Jem

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Re: Gearbox shot.
« Reply #83 on: January 12, 2018, 04:18:09 PM »
That's a good price. I was told by my mechanic there is only one place in Norwich that does gearboxes like that. It cost me 700 and I had the car back in under 24 hours.

I did try other places but no one wanted to quote as they didn't do that sort of work. I was told that even the main dealer would just remove the box and just send it to the company I used.

Jocko

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Re: Gearbox shot.
« Reply #84 on: January 12, 2018, 08:15:09 PM »
The firm I intend using
http://www.topgear.uk.net/home.html
do not remove the gearbox. They open the box in position. Obviously they know what they are doing and have the fixtures to do it. That is how they do it for that price.
I had asked about them changing the clutch and that is when he explained they don't go near the clutch per se.
Actually, his recommendation when doing transmission work is not to touch the clutch unless there is issues. They have found, by experience, more bother with new clutches than with leaving the old clutch!

degzi

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Re: Gearbox shot.
« Reply #85 on: January 12, 2018, 08:54:00 PM »
Let us know how it goes, 2.5 hour drive to Glasgow but worth it for me if it's that cheap

peteo48

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Re: Gearbox shot.
« Reply #86 on: January 12, 2018, 09:12:38 PM »
Just off the top of my head that does seem a decent price. I tend to think - gearbox? Add a nought!

Like the way the two identical blue Jazzes in this thread are facing opposite directions ;D

TG

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Re: Gearbox shot.
« Reply #87 on: January 13, 2018, 05:37:12 PM »
Noise from the gearbox is getting embarrassingly loud, outside car. I will have to do something about it. Sitting inside, with the car in neutral and the engine ticking over, you have to raise your voice to have a conversation!
Press down on clutch?
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TG

Jocko

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Re: Gearbox shot.
« Reply #88 on: January 13, 2018, 05:54:52 PM »
Sitting inside, with the car in neutral and the engine ticking over, you have to raise your voice to have a conversation!
That was just to let you know how loud it is. It is not something I would do through choice. If I get out with the engine running the sound is clearly evident. That means that as I drive past pedestrians, particularly if I am going up through the gears, the racket is plainly audible to them. When I am stopped and the engine is running, I always keep the clutch depressed these days.

sparky Paul

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Re: Gearbox shot.
« Reply #89 on: January 13, 2018, 06:19:38 PM »
It's a fair price, even if they are only doing the input shaft bearings. Whilst you probably wouldn't find cheaper, you shouldn't have to pay a lot more either for that job, but you need someone who is prepared the split the box themselves. Any mention of sending a gearbox to a 'specialist', and you need to get the wallet ready.

The firm I intend using
http://www.topgear.uk.net/home.html
do not remove the gearbox. They open the box in position.

I would be amazed if they split the gearbox in situ, you have to split the gearbox in two to get to the input shaft bearings. For a start, it's almost impossible without everything dropping on the floor! Additionally, unless the gearbox is removed from the engine, you can't replace the input shaft seal - it's behind the clutch release bearing.

It doesn't take long at all to drop a gearbox out on a ramp, and changing the input shaft bearings looks straightforward on this gearbox, from what I can see. You don't need to disturb the clutch at all, but it pays to replace it whilst the gearbox is off if it's not been done recently.

If you had done a few of these before, I think you could have the whole job done in 2-3 hours, if you don't hit any snags.

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