mrbeacham
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| posted on 17/9/06 at 06:26 PM |
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Help needed - gearbox experts
I'd be glad of any advice from anyone who knows a bit about gearboxes.
I have just got a donor Sierra for next to nothing which has lots of good bits I need. Unfortunately, the (Type 9) gearbox might not be useable. It is
absolutely fine (no noise or popping out of gear) except for the fact that I can feel a bit of gear crunching through the lever when I change into 4th
(up or down). If, however, I pause for half a second or so as I enter the gate then it's fine. From the limited amount I know about gearboxes
this suggests to me classic signs of a worn synchro. (It's done 110K)
I intend to have a peek inside when I remove it from the car. If it turns out that there's no visible problem with anything else, do you think
it's likely to fix it if I change just the synchro baulk rings? I believe one would usually replace other parts such as bearings as a matter of
course when carrying out such a major strip down, but as theres none of the problems usually associated with worn bearings I was wondering if I could
get away with doing just the synchro rings. How likely is this to solve my problem? Once I get into doing bearings, etc the cost goes way up and so I
might as well ditch the box and get another.
If there's a reasonable chance that doing just the baulk rings would sort it then I'd quite like to have a go as a bit of a self education
exercise!
Any thoughts?
Cheers
Mark
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oliwb
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| posted on 17/9/06 at 06:46 PM |
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It is a difficult one, not being an expert I believe you'd have to remove the (layshaft?) and you've got to take off all the various gears
etc to get to the baulk rings. I think you'd be looking at a proper rebuild though rather than a simple baulk ring replacement! Prob easier to
either leave it and put up with it for a while if its on a budget or get a new one/recondition or buy a reconditioned one....But as I say I'm
certainly no expert in gearboxes! Oli.
If your not living life on the edge you're taking up too much room!
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mrbeacham
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| posted on 17/9/06 at 06:55 PM |
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It would definitely be a big job involving removal and dismantling of the output shaft (according to the Haynes manual), but I don't mind the
time it takes. It would be hardly any longer to give it a full overhaul, but it's the cost I'm wanting to minimise.
I could probably get another used one, but I wouldn't really know if it was any good until I put it in the car. I don't fancy finding out
it's just as bad (or worse!) as the current one on my first outing in my newly built pride and joy!
Mark
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jollygreengiant
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| posted on 17/9/06 at 07:33 PM |
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First thing I would do is try it with a new clutch, it could just be drag from a tired/stiff/cheap clutch. Many years ago I change a gearbox because I
had convinced myself that the fault was in the gearbox. WRONG it was the 'cheap' power train clutch. After change the clucth twice (as
faulty clutch with the manufacturer) the third time I fitted a dealer clutch (made by LUK) and never had another problem. Ever since I've bought
LUK clutches.
If the problem still persists, trawl the breakers yards and find a cheap box then get someone to wave their majic wand over it , or you do the job
yourself at your leisure cos the box that is in there will last long enough for you to do it.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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Catpuss
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| posted on 17/9/06 at 07:39 PM |
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I would go with it for now and put some money each week aside for when it finally goes arse or you can afford a recon/rebuild.
I've had 3 cars and 4 bikes all with at least one grouchy gear and lived with it. But then again my mates Corsa broke a circlip. Luckly it fell
into the bottom of the gear box case. Better than my mates Vectra that had the bottom broken off the casing by road debris.
If it is an old box I would go for reconditing the whole lot rather than just one gear as the others may start doing the same in months/years to come.
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Chippy
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| posted on 17/9/06 at 10:35 PM |
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Its not worth doing half a job, after 110k you can pretty well bet that the bearings will be well worn, plus a few other bits and pieces. Get the
Haynes manual on gearbox repairs, this covers the type 9 in depth, well worth the money. I have similar problems, and will be "doing" the
box over the winter lay up, (its a real b*****d lifting out that V6, to get at it).  atb Ray.
THese people seem reasonable on price of bits.
http://stores.ebay.co.uk/main-train_Ford-Gearbox-Parts_W0QQcolZ4QQdirZ1QQfsubZ3213627QQftidZ2QQpZ2QQtZkm
[Edited on 17-9-06 by Chippy]
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