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 Post subject: Gearbox re-build or am I wasting my time?
PostPosted: Mon Jul 28, 2025 9:39 am 
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Joined: Mon Apr 17, 2017 12:23 pm
Posts: 1176
Location: Essex
TIPEC membership: 7868
I have the transaxle out to replace the clutch.
I took the opportunity to clean the transaxle and replace the seals as a precautionary measure.
The clean seems to have distubed something and I discovered a geabox oil leak. A new seal is required but further disassembly pf the transaxle was required.
I wont mention about The Torrey Canyon sized oil spill that occurred despite having drained the gearbox of that foul smelling gear oil (even when new).
Anyway, I have discovered that the differential output bearings are shot and the main gearbox bearing in the gear cluster has pitting on the rollers.
The Output shaft bearings are not stupid money but the other one is. Having shopped around I did get it for a very good price but still rather unpleasant.
I can likley do the diff output bearings myself with a bit of assistance. The main bearing is another story and I am just wondering if I am chasing my tail yet again and I would be better off sourcing a good used box? Would still do all the regular seals and bearings.
Or I just continue with the rebuild and don't worry about the slightly pitted rollers and put it back together?


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 Post subject: Re: Gearbox re-build or am I wasting my time?
PostPosted: Mon Jul 28, 2025 9:51 am 
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Joined: Sun Nov 04, 2007 7:43 pm
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Location: Chatham, Kent
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Whilst it would offend me admitting defeat I'd source another box. Then change the output seals before fitting it. Check the gearbox mount, linkage & driveshaft CVs before fitting it as well.

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2018 Mitsubishi Outlander PHEV
2005 Porsche Cayenne S SOLD
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1987 Porsche 944
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 Post subject: Re: Gearbox re-build or am I wasting my time?
PostPosted: Mon Jul 28, 2025 10:19 am 
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Joined: Mon Apr 17, 2017 12:23 pm
Posts: 1176
Location: Essex
TIPEC membership: 7868
Thanks for your reply Jim.
I have a new gearbox mount to fit as well as new CV's and the linkage is to be replaced with a short shift kit.

I think it is the not wanting to admit defeat element as well as being so hacked off with all the time and money spent thus far to get back to square one!


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