Perry Alvandipour

So I bought a 2003 audi s8. Before I bought the car I you know test drove it checked everything drove it for 2 days before buying (it was off craigslist) it. Car was running great **** I drove it to the Southside of san Jose and made my way to a smog shop and it passed smog flying colors. 15min after smog I got t a light and when the light turned green I went to go and the trans slipped and then it slipped again went into limb mode. How is this possible the car just passed smog 15 min ago. There is check engine light code p0730 and p0733. Incorrect gear ratio and incorrect gear ratio third gear. Anyway I want some advice I was just going to buy the parts to rebuild the trans or should I check and see if there is fluid in the trans. Will it still shift in gear if the trans is low on fluid? Please help anyone or suggestions. Thanx.

jfrahm

Could be a stuck pressure control valve or that stuck valve can cause other stuff to break. Low fluid usually has a few other symptoms, slow shifting to 4th, maybe slipping from a stop?
Did it shift rough, downshift rough, or freewheel-bang at all before it went into limp? Can you shut off and restart the car and not go into limp?

Perry Alvandipour

So yeah if I turn the car off and back on it won't be in limb mode. When i go into drive it still wont be in limb mode until it slips again which it does bringing it to drive from park position.Like the car was driving great it wasent shifting rough or anything. I think flywheel bang then limb mode. Like this was 15 after it passed smog.

Perry Alvandipour

yes it slips at a complete stop after driving it if it does catch.

tozoM8

Perry Alvandipour

I did and it does slip cold

jfrahm

As Gabor suggests it was probably slipping/banging sometimes before the sale, at that point it might have been saved but once the banging breaks something or blows a seal it's rebuild time. The seller might have beaten the game of russian roulette by selling it before it broke. Too bad, it's under $250 to fix when it's only the valve sticking and it hasn't broken the drum.

Perry Alvandipour

I'm sorry when it's cold it doesn't slips it engages but kinda has kick but as soon as it warms it doesn't engage