[anttin]

I've been reading posts about RR transmissions, but I haven't got a clear idea what might be wrong with my L322 -05 td6 transmission. First of all, are there more than one type of transmission with td6 year -05?

Then, my ansmission starts grumble at ~2000rpm when under heavy load (with trailer). It had the same problem 3 years ago and I took it to gearbox specialist. Something was worn out.. some surface, can not remember. Cost me 2200eur. Now, I have also noticed that when lifting my foot from the gas pedal, the rev meter needle does not drop. So it is breaking with the engne as with manual gearbox. Only when rpm's drop to ~1200, then the gear "dropps off". How does this sound?

 

[RRPhil]

Re: L322 -05 td6 gear box identification (slippin&sticking)

Nope. The BMW 130kW/390Nm M57 3.0L TD6 engine was always mated to the infamous GM 5L40-E transmission in the L322. It wasn’t until 2007MY, when the 200kW/640Nm 3.6L TDV8 diesel engine was introduced, that the transmission was finally upgraded to the ZF 6HP26 unit.

The 5L40-E was a very unhappy match in the L322 with transmissions typically lasting around 80,000 miles before requiring a complete rebuild. The main issue was that GM manufactured the valve bodies from soft cheese, which allowed the oscillating spool valves to wear their bores, resulting in leaking and cross-talking valves. This led to reduced hydraulic pressures on the clutches and, in particular, the torque converter lock-up clutch, which consequently burned through its friction material and then generated large quantities of metallic swarf which got deposited into the fluid.

Cowboy re-manufacturers would then clean out the transmission and replace the torque converter without addressing the cause of the problem (the worn valve body assembly), resulting in the whole process repeating itself – but much more quickly second time around.

The first thing you should do is to drop the fluid to see if it has glitter (metallic debris) in it.

Phil

 

[anttin]

Re: L322 -05 td6 gear box identification (slippin&sticking)

Thanks for the info and photos. I crawled under my car and confirmed the GM gearbox under there. What a piece of crap it is.. Is it possible to upgrade to ZF, and what would it require? Or am I destined to suffer from GM the rest of.. well, the rest of the time I own this otherwise so nice car.