Thread: 6hp26 transmission / transfer box failure

Pete
Was it a standard rebuild or did you get some upgrades ? (T/C or clutches )

Laurie

Gday Laurie

the new tranny is a used transmission/transfer box from a 2009 MY10 L322 tdv8, which was the facelift 3.6 with LCD/TFT instrument panel. The wrecker I bought it from claimed the vehicle had only 11,000km. I was naturally sceptical, but took a punt. It turned out the output spline and internals (viewed after mechatronic removed) looked new. So its at least a low km tranny.

The donor tranny has the same ZF part number (displayed on the side) as the old tranny namely 1068 020 075. A catelogue I found indicates most tdv8 3.6 L322s and L320s had a tranny with this part number. Both trannys are marked as 6HP-26. So, apart from the TCM and maybe the valve block, its seems they have identical internals.

So its probably not going to have the higher torque rating of a 6HP-28. However, it will probably have the lead free stator bush issue, so I'll do a tranny service at 50,000km intervals.

Hi guys,

After nursing a failing tranny for some time I finally had mine rebuilt by ZF Services. The key issue with mine was the bush failures that led to poor clutch pressure on one set of clutch packs apparently. They also replaced the entire mechatronics unit as well. All up cost was $5900. Hopefully now with proper fluid changes the tranny should last a lot longer than 100,000km.

Just out of interest Bruce said that the 3.6L TDv8's have softer bottom big end bearing shells that fail. Have any of you guys heard of this?

Thanks

Mick

Originally Posted by mfrankcombe

Hi guys,



After nursing a failing tranny for some time I finally had mine rebuilt by ZF Services. The key issue with mine was the bush failures that led to poor clutch pressure on one set of clutch packs apparently. They also replaced the entire mechatronics unit as well. All up cost was $5900. Hopefully now with proper fluid changes the tranny should last a lot longer than 100,000km.



Just out of interest Bruce said that the 3.6L TDv8's have softer bottom big end bearing shells that fail. Have any of you guys heard of this?



Thanks



Mick

I've never heard of a bearing failure. Turbos disintegrating and EGR bits falling into the pots causing damage but no bottom end problems. Mines got over 260,000 on it and it's very smooth. I gave it a caning last week on a soft beach at high tide, 30 degree heat, 50 kmh, low range 3000-4000 rpms. The motor and 6HP26 got very warm but never missed a beat.

Hi Mick,

What were the symptoms and how long did they last for?
I'm suspicious of mine.

Cheers Paul

Originally Posted by rar110

I gave it a caning last week on a soft beach at high tide, 30 degree heat, 50 kmh, low range 3000-4000 rpms. The motor and 6HP26 got very warm but never missed a beat.

any pics of the rooster tails

Originally Posted by Pedro_The_Swift

any pics of the rooster tails

Que?

Originally Posted by rar110

30 degree heat

????