Bang Drive

[Venice Sassone]

Thereis a TSB about this very issue. In my case the thump is VERY noticeable on inclines. Take your service tech for a ride in some "hilly" roads and he'll be sure to hear it. Acceleration from a stop on a hill will certainly lead to a thump.

I get the SAME thing on my 2011 AWD Edge - at lower speeds, if I let off on the gas a bit, coast for a sec, and then hit the gas again, I get a loud THUNK as it kicks me into gear. (I'm not even flooring it)

What confuses me is why does this only effect some vehicles? Is it really on all of them, but only shows up depending on your driving style? I drive in heavy traffic a lot which is the equivalent to the "rolling stop" scenario described in the TSB and would explain what I see it. I've already had it reprogrammed, which seemed to help for a little while, but it eventually came back.

Thank you very much for passing this on!! I have a big road trip coming up at the end of the month, I'm just debating if I want my tranny messed with just before I go, or if I should ensure its done first.

I've had it back for 2 days now and have done approx 200KM. So far no more clunking and I was getting pretty good at being able to reproduce it at will. I'd like someone whom hasn't done the TSB yet to validate one thing. Can someone switch to manual mode, take it up to 6th and gently slow down. Let me know if it goes through every gear on the way back down. I didn't notice it before, but running the new tranny fix though some tests, I noticed when downshifting, it skips 2nd. 6,5,4,3,1. It drops to 1st in a good RPM range though, so if you come right back on it, there is no lag and no major engine braking when it drops to 1st. Also just before dropping to 1st, 3rd still has enough power that it doesn't lag much either.

At this point it does appear to have less lag from the get go, but it did with my previous reprogram as well, but that didn't last long. It's still too early for me to give it a good review. Although starting on the 30th, I'm going to take it on a 4000+KM test drive for you, so I'll certainly update everyone after that.

So it looks like the 2nd gear skip may be part of the fix. I tried it numerous times and couldn't get it to touch 2nd. I guess the only official confirmation would be either to have Ford tell you its part of the fix, or have someone verify it before and after the fix. I wouldn't have thought to look at this before hand.

I noticed the RPM's seemed to behave a bit different in that range then before, but power / response wise, it seems to be still good, if not better. I figured that plugging a hole in the plate and completely removing a check ball was a significant physical change. It seemed something should be missing. This is why I switched to manual and started playing around, it kept me entertained at 7am in traffic. I guess its 2nd on the way down that was causing the issue.

Ever since I purchased our 2008 Edge Lmtd with AWD, I have not been real happy with the shifting ability of the transmission. I have experiences the klunking, thumping and slipping issues others have. As well as the roll back but I adjusted my driving habits.

In July 09, my wife was driving the Edge and experienced the vehicle suddenly not wanting to move forward even as she pressed on the gas pedal. She stopped, placed the transmission in Park, turned off the vehicle and then restarted and was able to drive off normally. A short distance later, again no moving forward but then wrench light came on, and other lights were flashing on the dash (her description). I drove to her location to assist and vehicle would not move forward. Vehicle was towed to dealer. There diagnosis was they found "Code P0720. P0722 watched PIDS and found OSS PID dropping to 0 intermittantly. Pulled front pan and replaced sensor." After I got the vehicle back, it was more or less fine other than just a feeling the transmission was loose still.

In Sept 09, I took the vehicle in again and complained of the shifting. They verified the complaint and performed TSB #8-26-13. When I got it back again, it drove OK but not a tight shifting of a transmission as I think it should be.

So I chalked it up to just my opinion. Well, lately the klunk as I lightly accelerate is back. Very obvious to me the transmission is slipping momentarily and then catching, thus the klunk or thump. I was planning on taking it in again if it persisted. So tonight, I back out of a parking spot, place transmission in drive and accelerate but car barely moves forward. Dropped shifter to Low but same effect. So I shut it off, restart and vehicle drives normally home. Now I am waiting to take to dealer on Monday.

I just couldn't wait any longer. The transmission seemed to be getting worst. One big scare while trying to do a hiway pass the other day. The tranny seemed to get stuck in neutral when trying to down shift. The engine reved up but the car slowed. It finally kicked into gear. Shifts have been getting more noticeable also.

An international team of researchers has successfully used a supercomputer simulation to recreate the formation of a massive black hole from supersonic gas streams left over from the Big Bang. Their study, published in this week's Science, shows this black hole could be the source of the birth and development of the largest and oldest super-massive black holes recorded in our universe.

"This is significant progress. The origin of the monstrous black holes has been a long-standing mystery and now we have a solution to it," said author and Kavli Institute for the Physics and Mathematics of the universe (Kavli IPMU) principal investigator Naoki Yoshida.

Recent discoveries of these super-massive black holes located 13 billion light years away, corresponding to when the universe was just five per cent of its present age, pose a serious challenge to the theory of black hole formation and evolution. The physical mechanisms that form black holes and drive their growth are poorly understood.

Theoretical studies have suggested these black holes formed from remnants of the first generation of stars, or from a direct gravitational collapse of a massive primordial gas cloud. However, these theories either have difficulty in forming super-massive black holes fast enough, or require very particular conditions.

Yoshida and JSPS Overseas Research Fellow Shingo Hirano, currently at the University of Texas at Austin, identified a promising physical process through which a massive black hole could form fast enough. The key was incorporating the effect of supersonic gas motions with respect to dark matter. The team's supercomputer simulations showed a massive clump of dark matter had formed when the universe was 100 million years old. Supersonic gas streams generated by the Big Bang were caught by dark matter to form a dense, turbulent gas cloud. Inside, a protostar started to form, and because the surrounding gas provided more than enough material for it to feed on, the star was able to grow extremely large in a short amount of time without releasing a lot of radiation.

"Once reaching the mass of 34,000 times that of our sun, the star collapsed by its own gravity, leaving a massive black hole. These massive black holes born in the early universe continued to grow and merge together to become a supermassive black hole," said Yoshida.

The result from this study will be important for future research into the growth of massive black holes. Especially with the increased number of black hole observations in the far universe that are expected to be made when NASA's James Webb Space Telescope is launched next year.

I rolled the truck in four-wheel drive back and forth on the pit a few times, then applied a little outward pressure to the axle flange, and it moved out of the differential a good half-inch, well past where it had been riding on the seal normally. There were no signs of a leak from the axle at all. At this point I recommended pulling the axle housing off the differential to inspect the parts inside.

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