Hi guys,

A couple of questions if you don't mind.

Firstly, my 2009 L322 TC V8 is due for a MOT/service in July, it is currently on circa 83,000 miles and I was wondering if it is worth doing a gearbox flush? I know these cars can have issues with the transmission and wanted to think about some preventative maintenance.

Secondly, a bit of a weird one and hard to describe. I've noticed that when slowing down followed by sudden acceleration (eg pulling out into a road) the gearbox (i think) does a substantial clunk. It feels like something is slipping in the gearbox and then biting with a substantial increase in acceleration. I appreciate this is hard to describe so I will try and detail an example:

Coming up to a roundabout at 50mph, break down to 10mph, see that nothing is coming, remove foot from break and accelerate into the roundabout. When applying the accelerator it takes circa 1 second of no power, then a clunk / jolt followed by (I'm guessing) finding the correct gear. It does not happen at every round about and I have found that if you very carefully increase the acceleration it does not happen. Is it perhaps something to do with slack in the drive train?

A point to note is that I have also owned 2 Land Cruisers and both had similar issues albeit at around 250,000 miles.

The 6HP26 is notorious for the 2-1 downshift issue (BMW & Jaguar owners even set up a website specifically to try to get the manufacturers to do something about it). The first thing to do is to check that you have the latest firmware update for the Mechatronic unit. Solenoid issues are also extremely common with the 6HP26, with a new set costing around £265 + fitting.

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