Continuation of my original thread

https://xoutpost.com/bmw-sav-forums/...-failsafe.html

For sure, I have a Bad Battery. After 3-4 stops/starts and about 10 mile drive, I think the alt MAY be okay and it's my battery

What is weird is when I test drove the car with a good donor/test battery, it was still showing trans issues. This test drive with donor battery was very very limited. I just drove around the block.

Anyhow, original battery charged and rested overnight.
Resting voltage showed 12.7 in the morning.

Had both alt and battery load tested at autozone. Maybe 3/4 mile drive from Autozone. Their tester says *replace battery-whatever how that is interpreted*. It was at 12.4 when they load tested the battery after the 3/4 mile run.

The entire drive showed alternator hovering mid 13's , with only dips down to 12.3-12.7 when decel/throttle off.

Extended test driving, buying a new battery, etc. Probably put like 10 miles in total watching alt voltage.

For the most part, alt hovers at mid to high 13's. I do see it dip as low as 12.3 when decel.

The transmission still feels like it's in limp, and when accelerating from stop or just 1-2, it is jerky. Even jerky when decel.

WILL the bad battery literally cause all this I am feeling in the tranny ?

Got new battery on float charger. Will swap when I get home tonight to do another round 2 of testing.