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The garage initially diagnosed it as engine mount knock but it got worse over a few weeks - vibrating rotational noises especially at low revs or at idle which has gradually gotten worse, the gears beginning to slip, slow acceleration, loss of power and most recently engine management light has came on. My mechanic who is also my brother in law with 45 years in the trade is querying if one or more of the bolts that hold the TC on might have sheered which could be causing the noise, he was initially going to look at that but then thought rather than dropping the transmission twice with labour costs it might be prudent to source a replacement for a good price and I found this one on eBay.
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</blockquote>That sounds more like an internal gearbox problem. Especially as its slipping. Its easy to see if one of the bolts has sheared, there is an inspection hole. I would be checking that first.<br />
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Before you buy anything and waste money on parts I would diagnose it properly. If you have lack of power, this is unlikely be a gearbox issue. I expect the engine is in limp mode and that needs to be investigated. If you have an engine light it makes the diag easier.<br />
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If the gearbox is slipping then the fluid level needs to be checked and then the gearbox sump pan removed to check for any debris in the bottom of it. If there is slipping and the gearbox is noisy the I will expect there to be. If there is, it will need a re-build. It might be prudent to take it to a MB specialist near you for proper diagnosis.</div>
