Thread: D4 Gearbox rebuild

Originally Posted by Eric SDV6SE

Did my ZF 6HP28X valve body myself in my garage, does that make me 1 of 3?

Unless you are the other 2 of 2 bloke?.....they guy there said there is a lot of work to do them properly, can only go by what he said.

Originally Posted by Matty_P

Unless you are the other 2 of 2 bloke?.....they guy there said there is a lot of work to do them properly, can only go by what he said.

So it’s true that if you have deep wear and leakage, then in some cases you will need to ream elements of the valve block and use oversized components. The tools required are purchasable from Sonnax however it would be unlikely to be economical to buy the valve block mounting tools to be used with the reamers for a single rebuild, plus the vacuum testing equipment.

Originally Posted by Matty_P

Unless you are the other 2 of 2 bloke?.....they guy there said there is a lot of work to do them properly, can only go by what he said.

Nope, just followed the instructions with the zip gen2 kit and the ZF transmission manuals on the web. Watched several YT vids to get my head around it.

Sonnax out of the US (the Zip Kit manufacturers) also has a good source of info.

No special tools required either. Just got to keep everything clean. I used liberal amounts of cling wrap after each stage of disassembly and reassembly.

It was not that hard actually, the real benefit is that most components only fit one way, and if you take the time and care to note where everything goes, you can't really go wrong.

Originally Posted by Matty_P

Hi TerryO,

Transmission Centre at Underwood....great blokes they rebuild ZF boxes for many different cars LR, BMW etc.

They send the valve body to a guy in SEQ that is 1of 2 people that can do them nationally.

Box has run really nice since since Oct 2108 rebuild.

Matt

Matty, Nice to know that they will run for another century with your 2108 rebuild