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Old 02-04-2019, 09:55 AM
ala2000 ala2000 is offline
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Join Date: Mar 2011
Location: USA
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Thank you all for the responses.

When car is running idle with no other accessory is on, the alternator measured 14.5v which is good. My one year old battery reading is good at terminals under the trunk but reading is not good (failed) under the front hood at auxiliary battery posts. May be this is normal or may be battery voltage drops too much from battery to the front. I have no starting problem at all.

Most online reading said that ripple voltage should under 50mv but can go high up to 100mv depend on the car. So I do not know the ripple that I got 55mv is too high or is acceptable. The car throw "Trans Failsafe Prog" from time to time and seems to be slipping between 2nd to 3rd gear. But it will disappear if you restart the car. My 01 X5 V8 only has 120K. I love the car but it will be disappointed say the least that tranny failed at 120K.

Thanks,
ala2000
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