Dave Ashurst
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| posted on 26/4/10 at 06:11 PM |
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How to check if a gearbox is OK before fitting it?
I've got a used gearbox that I'd like to swap into my car but I don't know anything about it's history.
The car's working now, so I want to be as sure as possible that there are no faults with the replacement gearbox before I embark on the whole
engine out palaver.
Has anyone got any practical advice on a good (i.e. cheap) way to bench check/test for wear and functionality of the gearbox?
Simple and non-destructive is good  I'd much rather not strip and rebuild it first!
thanks in advance
Dave
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MakeEverything
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| posted on 26/4/10 at 06:15 PM |
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Clairvoyance?
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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Dave Ashurst
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| posted on 26/4/10 at 06:19 PM |
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quote:
Originally posted by MakeEverything
Clairvoyance?
I knew you were going to say that...
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David Jenkins
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| posted on 26/4/10 at 06:20 PM |
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Assuming that it's something like a Ford type 9...
You could:
Take the top cover off and rotate all the gears to see if any teeth are chipped.
Look between the gears to see if the synchro bits are still intact.
Examine the oil to see if it's clean with no sign of metal dust floating in it.
If it has no oil, turn the whole box over and see if any broken bits drop out!
Rotate the input and output shafts to feel if there are any nasty graunches as it turns.
Listen for any gritty noises as it turns.
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Dave Ashurst
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 posted on 26/4/10 at 06:33 PM |
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Ta Dave, good stuff
D
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Dave Ashurst
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| posted on 26/4/10 at 08:49 PM |
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Checked it out, I can wiggle the input shaft a tiny bit side to side. How much play is normal/acceptable?
If that's ok then the only minor downside I can see is that the speedo drive opening is blanked off, looks like bolted from the inside so
I'll need to get a different speedo.
Otherwise it seems to be in good condition. Very clean inside, no signs of damage, no bits fell out, gears select well, turns smoothly in every gear
(silky in one direction, clicky in the other - I hope its the right way).
Have I missed anything?Image deleted by owner
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flak monkey
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| posted on 26/4/10 at 08:52 PM |
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Clockwise looking from the front of the box Dave
Sideways movement is also normal on the input shafts. Usually under 1.5mm at the spigot bearing though.
Sera
http://www.motosera.com
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Dave Ashurst
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| posted on 26/4/10 at 09:36 PM |
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Looking good then!
Clockwise is smooth Total range of movement at the spigot is 1.5mm.
I need a new propshaft, but Dave Mac will sort that out for me before the weekend If I get my act together.
Bike speedo will do.
Yay!
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coozer
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| posted on 26/4/10 at 09:39 PM |
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Its nearly 17 years since Ford made these so its really a suck it and see...
Good strong boxes though and most major problems can be found by selecting gears, looking inside etc..
Bung it in and enjoy!
1972 V8 Jago
1980 Z750
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Dave Ashurst
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| posted on 26/4/10 at 09:52 PM |
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It's a heavy duty quaife in a ford casing, dunno how old, nor what it was used for nor when last rebuilt.
Certainly seems worth bunging in though. I think it should be good and strong.
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