Anyone had any experience or can recomend a specialist for repairing an old gearbox from a 1969 MGB GT?

Google returns millions of results but its hard to distinguish who’s good and will give it the proper attention it deserves or just try to sell me a new one??

Gut feeling is the big outfits may not have the expertise or tooling to repair older boxes.

Help!! 🙂

Steve Cartmel in Atherton, blokes a genius

https://m.facebook.com/Cartmell-Transmissions-1511295479093598/?ref=page_internal&mt_nav=1

When I used to mess around with Land Rovers the respected name in gearbox work was Ashcroft Transmissions. I bet there isn’t much difference between an old MG gearbox and an old Land Rover gearbox; in fact I bet they’ve even got parts in common.

Cheers guys, I’ll drop them a mail. We did think about stripping it down ourselves and give it a whirl, but considering its whining along with the synchromesh on 3rd being knackered it might need a more expert eye on it.

Still, not bad for a £12.50 purchase of ebay 13 years ago!! We still have the original box but the overdrive uinit makes modern day driving a bit more friendly

The MGB boxes are very simple to work on. The only slightly difficult part is the crush washer on the output shaft but if you count the number of turns to take the yoke bolt off then put it back on the same number it will be fine.

The Haynes manual covers all aspects of rebuilding the box including stripping and building the gear cluster.

All parts including the syncro rings are available from Moss for not very much money.

If you are half way handy with a spanner then you’ll have no problem doing it yourself.

When refilling with oil remember it uses engine oil not gear oil as gear oil is too thick to allow the overdrive to work properly.

@jonm81, cheers for that. I did check with my dad last nigth about the oil – I got a stare of death over the top of his glasses before being schooled on how an overdrive works!!

Could be a project for winter on the dining room table!! 😆

And a pic for the classic car enthusiasts

[url=https://flic.kr/p/TcDPTY]Untitled[/url] by Dave Aspinall, on Flickr

“The Haynes manual covers all aspects of rebuilding the box including stripping and building the gear cluster.“

The good old days when Haynes manuals were actually useful ! You don’t get that detail for anything modern (by which I mean nineties onwards).

globalti – thats not been the case for a while now just dont seem to have the same care given + you wont be getting your box back its just a refurb off the shelf and they refurb yours for the shelf.

try shabs piercy at syncrogearboxes for a rebuilder hes the current go to for landies.

Actually, ignore the bit about the crush washer. That is on the diff input and sets the correct end float on the pinion gear so sorting the gear box is even easier.

Is it possible that the whine is coming from the diff? Do you get a heavy clunk when lifting off the accelerator? Both are a cause of the phenolic washer on the diff side spur gears and the copper washers on the planetary gear having disintegrated. They are about £20 for all 4 and only take a couple of hours to replace.

It could well be the diff. There is loads of play in it as my dad admitted to over-tightening the crush washer at some point. It never used to whine, and we’ve done no work to it, but it was last on the road nearly 7 years ago, so it could be the diff. We’re going to drop the original gearbox back in so should hopefully see if that makes a difference.

thanks for the help though, much appreciated

Dave