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M32 gearbox failed? Post here.

29K views 216 replies 108 participants last post by  Oilyrag  
#1 · (Edited by Moderator)
To settle a bit of a discussion, could anyone that's had a M32 gearbox fail in their Astra (or Vectra), please post here?

Please also list the miles done when the box failed, and if your car was modified or standard.

Thanks!



From information on here I've done a couple of graphs which quickly show stats. First is what engine that people have said, the other is what miles the gearbox got repaired at.

Mickie





 
#5 ·
1.9 CDTI, 70,000 miles = Whine in 5th and 6th (no gear stick movement though), warranty wants me to pay for investigation, whereby 5 garages have confirmed that it's a failed bearing!! FFS!!! Perhaps it's just a matter of time....?

Anyone else have the "whine" noise, but just put up with it?

Serious design flaw by Vauxhall, can't understand why they used what they did :nah:
 
#7 ·
VxR gearbox was on its way out when I got the car totally stock, being replaced now under the warrenty. The M32 gearbox is faulty and vauxhall knows this.
 
#12 ·
The main reason people feel the m32 box fails is cause the standard gearbox oil is pants as when it gets hot it looses its lubrication properties so cant keep the bearings lubed and they wear out quickly as a result.. need to change it to a decent 75/80 semi synthetic oil if running a standard diff, with a lsd people recommend a 75/90 iirc?

Currently im on my third box but since it was rebuilt 20k miles ago its not had the standard gearbox oil and has been good! Cars on 57k atm too.. but the thing is with the box its kinda hit and miss as some people have no end of issues with it and some are very lucky buggers who have no issues at all even with 150k plus!!
 
#19 ·
I think the issue with the M32 comes from the torque limt on the M32 being 235ish the 1.9 and VxR's stock torque is about 235 so the gearbox has reached its torque limit right of the bat.
 
#28 ·
Does make me wonder why they opted to fit the F40 into the Vectra though. I know that the F40 will not fit an Astra due to the mountings being different on the M32, but you'd have thought if they know they have a stronger box, they'd design the Astra to fit it as well?

I don't know much about this sort of thing, but it just seems logical if you're going to fit a strong gearbox to one model, why fit a weaker gearbox to another model with the same engine? :err:
 
#33 ·
#34 ·
On my own 1.9 120 van it went at 44k and 4 years old. Works van 1.7 100 it went around 66k, then needed replacing for a 2nd time just over 100k. My own 1.7 100 (remapped to 130ish) is fine touch wood, but then it's only 18 months old and only just done 10k!

I've just come back from seeing a 1.9 120 van today with a view to buying it. One owner from new, 56 plate, 88k, FMDSH. As soon as I brought up the clutch to the biting point the gear stick jumped backwards about 4cm! So that's another one you can add to the 'failed' list. DMF was buggered on it too as it had the death rattle immediately after starting her up.