Stuck in reverse!

Standard & modified running gear

Re: Stuck in reverse!

Postby Panky » Mon May 02, 2016 7:06 pm

And I'll stop bump starting in reverse off the drive when the battery's flat :oops:
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Re: Stuck in reverse!

Postby MM » Tue May 17, 2016 3:39 pm

Blasted stupid gearbox has done it again today! :( Parked up this morning after a 7-mile drive with no problems, returned to it a while later, went to select reverse, the gearbox baulked a bit, then tried selecting a forward gear, and it's gone into that situation of being stuck in what I think is reverse and 4th again.

Fortunately, it's only about a mile or so from home but nevertheless looks like I'll probably have to get it towed there. :roll:

Unless anyone knows of an easier solution to correcting the selector fork(s), other than taking off the side inspection cover/drain plug?
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Re: Stuck in reverse!

Postby MM » Sat May 21, 2016 1:20 pm

Well, managed to free it off again today; had to jack the car up, drain the gearbox oil so that I could reach into the drain plug hole with a long flat-bladed screwdriver, and with the aid of a bright torch, slide the reverse gear fork back into the correct position again.

Good news is, you can do this without having to also remove the side inspection hatch. :)

I noticed that with the gear lever in the neutral position, the car was stuck in reverse gear, while moving the gear lever fore and aft in what felt like the 3rd and 4th gear positions would create the situation where it's stuck in reverse and a forward gear (which I presume to be 3rd or 4th) at the same time.

I'm wondering if maybe the reverse gear detent slug isn't in the right place to cause this recurring problem.
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Re: Stuck in reverse!

Postby Plin » Sat May 21, 2016 2:23 pm

:D Glad to hear you have found a solution - though I suspect you are not enjoying becoming an expert in how to remedy the 'stuck in reverse' saga?!!
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Re: Stuck in reverse!

Postby bmcecosse » Sat May 21, 2016 2:51 pm

Yes - the interlocks must be incorrect. Well done 'fixing' it meantime. Otherwise it would have meant prop shaft off to move it at all.
 









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Re: Stuck in reverse!

Postby MM » Sat May 21, 2016 8:24 pm

Thanks for the kind responses. :D I did some research on the subject today, and came across this excellent guide from a member of the Dorset MMOC to building Minor gearboxes, that goes into more detail than I've seen, even in the Workshop manuals and Practical Classics guides (as useful as they are in themselves):

http://www.dorsetmmoc.co.uk/wordpress/t ... ebuild.pdf

So, having finally got the car home again, I'll be looking into the reverse detent slug on the existing gearbox, and hopefully have another bash at building up a better gearbox...
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Re: Stuck in reverse!

Postby MM » Mon Aug 01, 2016 10:08 am

Well, a bit of investigation having removed the back of the gearbox (to remove the 3rd/4th gear selector rod) and side inspection hatch revealed that while all the detent slugs were in place, the ball that slots into the bottom right hand hole of the inspection hatch nacelle and rubs up against the back of the 3rd/4th selector rod was missing. :?

So, hopefully that's all that was causing this problem.

I'll refit a ball in there, reassemble it all and try again soon...
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Re: Stuck in reverse!

Postby MM » Sun Aug 14, 2016 7:35 pm

Well, I refitted a ball in there, as per the diagram in the Haynes manual and another guide, and reassembled the back of the gearbox today. However, it seems no different, and will readily lock itself up so you can't select 1st or 2nd gear again. :?

Think I'll just have to 'bite the bullet' and build up another gearbox for it...
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Re: Stuck in reverse!

Postby Plin » Sun Aug 14, 2016 10:12 pm

:? sorry to hear you still have the problem after all your efforts. 10 out of 10 for perseverance (or should that be a 'gold' medal in view of the current Olympics?!!)
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Re: Stuck in reverse!

Postby MM » Mon Aug 15, 2016 3:59 pm

Thanks, Plin. It is rather frustrating, but looking on the bright side, at least I've been forced to learn quite a bit about gearboxes. :)
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Re: Stuck in reverse!

Postby MM » Mon Aug 29, 2016 7:03 pm

Well, I think I may have finally cracked it - today, I took the back off the gearbox and side inspection hatch off, partially removed the 3rd/4th gear selector rod again, and had another go at getting that detent ball into the right place; previously, it was pushed up against the outside of the rod, whereas it needs to be on the inside of it, where it nestles in between a pair of selector rods.

A poke with a screwdriver to get it into the correct location and checking to see if it was in place with a bright torch, then reassembly appears to have done the trick. :)
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Re: Stuck in reverse!

Postby Panky » Mon Aug 29, 2016 7:28 pm

I do hope so, bloody frustrating for you
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Re: Stuck in reverse!

Postby MM » Mon Aug 29, 2016 7:59 pm

Well, I suppose I only had myself to blame for (somewhat hurriedly) assembling a spare gearbox to get it back on the road and inadvertently putting the detent ball in the wrong place. :roll:
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Re: Stuck in reverse!

Postby Plin » Mon Aug 29, 2016 10:16 pm

:D Yippee, it's great you've sorted your reverse problem at last - now to enjoy driving again!
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Re: Stuck in reverse!

Postby MM » Tue Aug 30, 2016 7:57 pm

Thanks, Plin. :) Looks like I'll have to press it back into service, as the daily driver (Fiat Seicento Sporting) is giving no end of grief in this hot weather, with cutting out in traffic and difficult starting. :roll:
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