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PeterTh
Member Since: 06 Sep 2013
Location: Alunda
Posts: 330
  
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Hello, I have a problem with my 6sp autobox in my 2011 D4. Sometimes, I believe when the oil is up to temp, I get a Gearbox fault when changing from D to N or P. Fault code is P0915 Gearshift position-circuit range/performance and it is set in the TCM. The box is only using limited gears and if the car is in P it needs to be restarted to release it. Initially it got better when I cleaned and lubricated the gear linkage but it didn´t last.
I will try to adjust the linkage again but I feel that the problem might be the position sensor in the TCM. After spending a long time online searching for clues I have realized that it is a rather common problem for the ZF 6HP28 box. Buying a new Mechatronic unit is expensive and I have seen that some have actually changed the sensor only. It is soldered to the TCM and covered with resin so I believe it is not for me to fix it. Does anyone know of a service that can fix this if sending them the TCM? Other ideas?
Thanks,
Peter 2011 Discovery 4 3.0 TDV6 S Automatic
1999 Discovery 2 V8 ES Automatic
Earlier
2006 Discovery 3 TDV6 SE Automatic
1996 Discovery 300 Tdi ES Automatic
1975 Series 3 2.25 diesel
Nanocom Evolution for D2 V8, D3 and D4
Working kelpies for working the sheep
 
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 9th Dec 2020 5:08 pm |
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teddy
Member Since: 22 Jul 2017
Location: suffolk
Posts: 72
 
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Sorry I can't help. Where have you found out this is a common problem with the 6 Speed gearbox? 2010MY Disco 4 HSE in Ipanema Sand over Almond.
It's got THE rear diff.
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| 9th Dec 2020 9:02 pm |
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TigerRecovery
Member Since: 31 May 2017
Location: Long Stratton, Norwich, Norfolk
Posts: 901
 
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The position sensor on the right hand side of the gearbox sits directly under the Aircon drain tube and gets water on it quite often. It's a common fault on the 6 speed box and is reasonably easy for a diy person to fix. 1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
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| 9th Dec 2020 9:14 pm |
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PeterTh
Member Since: 06 Sep 2013
Location: Alunda
Posts: 330
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Common is maybe not the correct world but it seems to be fairly regular in other brands using the ZF 6HP boxes like BMW:s.
TigerRecovery, I think you mean the manual gearbox? In the 6-speed auto the position sensor is positioned on the mechatronic unit together with the TCM inside the gearbox.
//Peter 2011 Discovery 4 3.0 TDV6 S Automatic
1999 Discovery 2 V8 ES Automatic
Earlier
2006 Discovery 3 TDV6 SE Automatic
1996 Discovery 300 Tdi ES Automatic
1975 Series 3 2.25 diesel
Nanocom Evolution for D2 V8, D3 and D4
Working kelpies for working the sheep
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| 9th Dec 2020 10:44 pm |
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PeterTh
Member Since: 06 Sep 2013
Location: Alunda
Posts: 330
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I might have found the cause for my problems. I have cleaned the earth point for the transmission. It was rather crusty and I haven´t had any problems after cleaning it. As this is an intermittent fault in my car I just hope it isn´t an unusually long time between reoccuring faults...
The transmission earth point is on the body behind the right headlight. If you take the headlight out you will see two earth points. I cleaned bouth of them.
//Peter 2011 Discovery 4 3.0 TDV6 S Automatic
1999 Discovery 2 V8 ES Automatic
Earlier
2006 Discovery 3 TDV6 SE Automatic
1996 Discovery 300 Tdi ES Automatic
1975 Series 3 2.25 diesel
Nanocom Evolution for D2 V8, D3 and D4
Working kelpies for working the sheep
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| 10th Jul 2021 1:49 pm |
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