I've browsed the forum for months now and about a month or two ago, I had the clutch, flywheel, and slave cylinder replaced on my 2006 BMW M5 SMG. In addition to that, I had them replace the hydraulic unit motor as preventive maintenance.
Well, 1500 miles later and now I have the yellow cog and red cog of death occurring.
It started today while I was making a quick run to the store. Both the red and yellow cogs occurred, transmission fault, and the car was placed into limp mode. I sat there for a few minutes and then, like magic, it disappeared. So, I thought, maybe a glitch occurred.
So I drove about another mile and then it happened again. This time, I couldn't get the car out of limp mode and it wouldn't go away. Fortunately, I was only two miles away from my home, and after much difficulties getting the car home (delayed shifting, seemed like the clutch wasn't engaging, very jerky), they went away again. Then I became a bit adventurous. I decided to get the battery and alternator tested; both were fine. That wasn't what I wanted to hear, as I would much rather have a sad battery than a failing smg pump...
I then took the car on a small drive and was unable to replicate the cogs. The car shifted and drove, perfectly. I even floored the car and abused it, which I don't normally do. Still, no cogs. I returned home and parked it in the garage.
About 30 minutes ago, I ran to Walmart to get some envelopes... and I made it there without any difficulties. However, on the way home... a different story. The cogs came and disappeared in a matter of seconds. I made it home and parked in the garage... and that's where my beast is now.
Any ideas? Clutch position sensor? Crankshaft sensor? SMG Pump? I've put over $10,000 into the car this year and I am starting to hate my M5. I've had problem after problem and there doesn't seem to be an end. I thought that after getting the clutch, flywheel, slave cylinder, and SMG pump motor replaced, I would be good for at least 5,000 miles. But, nope.
I am going to have my mechanic scan the codes tomorrow and see what's up... given my luck, I'm expecting the worst.
Well, 1500 miles later and now I have the yellow cog and red cog of death occurring.
It started today while I was making a quick run to the store. Both the red and yellow cogs occurred, transmission fault, and the car was placed into limp mode. I sat there for a few minutes and then, like magic, it disappeared. So, I thought, maybe a glitch occurred.
So I drove about another mile and then it happened again. This time, I couldn't get the car out of limp mode and it wouldn't go away. Fortunately, I was only two miles away from my home, and after much difficulties getting the car home (delayed shifting, seemed like the clutch wasn't engaging, very jerky), they went away again. Then I became a bit adventurous. I decided to get the battery and alternator tested; both were fine. That wasn't what I wanted to hear, as I would much rather have a sad battery than a failing smg pump...
I then took the car on a small drive and was unable to replicate the cogs. The car shifted and drove, perfectly. I even floored the car and abused it, which I don't normally do. Still, no cogs. I returned home and parked it in the garage.
About 30 minutes ago, I ran to Walmart to get some envelopes... and I made it there without any difficulties. However, on the way home... a different story. The cogs came and disappeared in a matter of seconds. I made it home and parked in the garage... and that's where my beast is now.
Any ideas? Clutch position sensor? Crankshaft sensor? SMG Pump? I've put over $10,000 into the car this year and I am starting to hate my M5. I've had problem after problem and there doesn't seem to be an end. I thought that after getting the clutch, flywheel, slave cylinder, and SMG pump motor replaced, I would be good for at least 5,000 miles. But, nope.
I am going to have my mechanic scan the codes tomorrow and see what's up... given my luck, I'm expecting the worst.