Oil leak after replacement gearbox and new clutch fitted- 156 V6. - Alfa Romeo Forum
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Oil leak after replacement gearbox and new clutch fitted- 156 V6.

Hi all seeking a bit of technical advice to sort out a leaking gearbox.

After many faithful years serving as a spider gear in my diff these little guys decided to split up and go their own way:

IMAG0024 - Copy.jpg

Some were ambitious and joined the outside world through the transmission housing while others made their way into the gearbox leaving me with a box of this:


Organized a replacement gearbox and had the vehicle repaired at a decent transmission specialist. They used a combination of the best bits of the two boxes and fitted a new agent supplied clutch. Picked the car up Wednesday and all seemed well but Thursday morning was greeted in my drive way by a small pool of gearbox oil under my car, turned out they did not fit new seals instead reused the ones from the original g box

It looks like the leak is from the area where the left drive shaft enters the transmission. They said they will fix it free of charge I just need to supply the seals, which seal is the likely culprit causing the leak? How difficult would it be for me to replace the seal myself?

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Sounds like a diff seal - pretty straightforward. You have to remove the driveshaft.
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Agreed, hardest part is taking driveshaft out, from then its pull the old seal out using any tool that works, theres no real set tool, on some i have flicked them out with a flat blade screwdriver, others ive had be more brutal, make sure surroundings is clear of grit and clean and then press the new seals in flat as poss, ive used an old brake calliper piston to push Pug ones back in before but most people use a good size socket most of the time.

Main thing is make sure box is drained thoroughly, any you dont get out especially on a sloped drive WILL be coming out while your trying to do the job


Breaking 2005 156 Facelift 2.0 JTS Veloce Saloon & 2002 02 156 Sportwagon 1.8 Tspark, all parts available
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156 , clutch , fitted , gearbox , leak , oil , replacement

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