Gearbox Housing Stress Fractures?

Drivetrain problems

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Gearbox Housing Stress Fractures?

Postby steverob30 » Tue 29.05.2012, 19:10

Haven't posted for quite a while. Years to be exact! SORN'd my lady (M100 SE Red, 100k miles) in 2005 and planned to do a complete front end rebuild due to numerous problems including:
Very badly cracked exhaust manifold,
Disintegrating Rad,
Disintegrating cooling fan cowls,
Disintegrating brake pipes...the list goes on!

Having finally managed to find some time to potch again (after creating 2 children and starting my own business) I finally managed to crack the gearbox off and lift out the engine today.

Started merrily scrubbing the corrosion off the inside and out of the casing and noticed some odd patterning in certain areas. the casting doesn't seem to be particularly high quality with lots of snobs particularly on raised sections but more concerning is the appearance of very fine hairline cracks. they show up clearer when a bit of grime is rubbed into them.

There is no obvious evidence that the cracks are anything more than superficial (using a bit of wet n dry they dissapear) but there are LOTS of em.

Just wondering how terminal this is. As I have gone to the effort of removing the engine and gearbox I will be replacing the clutch plate and thrust bearing just as a precaution and what I need to know is am I looking at a new gearbox casing too???? :evil:
Why do I start these things
steverob30
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Re: Gearbox Housing Stress Fractures?

Postby Specky » Fri 01.06.2012, 22:30

I don't know if this helps, but mine is cracked as well.

My crack is under the selector housing and thus doesn't leak, but it will be changed when time allows.

Are you sure it's cracked all the way through, or is it just an upper surface crack?

On the second car I do have some small hairline cracks. A bit of a spiders web if I tell the truth. It's only on the inside of the bell housing... And only in one area...

TTFN
If you have a problem, if no one else can help, and if you can find them, maybe you can hire... The N/A-Team.
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Re: Gearbox Housing Stress Fractures?

Postby steverob30 » Wed 13.06.2012, 19:49

Cheers Specky! good to know that its not just me!

It seems that with a bit of effort, most of the spiders web will polish out which is good to know. I used a coarse buffing wheel fitted to my little cordless and it came up a treat. was trying to post some photos but they are too big >500K so i cant!

btw don't suppose you know a decent shot blaster do you?
Why do I start these things
steverob30
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