shunter v8
Active Member
My 2004 V8 was having transmission failsafe mode come up on a regular basis, it was diagnosed as low voltage so I bought Lucas AGM battery as advised by the auto electrician, a week later same faults coming up, I have a battery tester that has an AGM setting on it and it was comng up state of charge 78% state of health 36% saying replace battery so i took it back and got a replacement, all was well for a week and today transmission fault came back I checked the battery and state of charge is 79% state of health 40% and it says replace battery, if you charge it the state of charge goes up to 98% but the state of health stays low at around 38%. The car starts fine every time. I did check the battery before fitting it and all was good. Any ideas would be greatly appreciated.