2.7T auto: problem with reverse
01-05-2011, 10:00 AM
#1
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2.7T auto: problem with reverse
Ok so I did a quick search, and I have a few ideas what the problem might be, but I'm not conclusive, so here it is:
I have a 2001 2.7T Allroad automatic tranny. When I put the car in reverse, it backs up, but if I give it gaz, it's almost as if the car is in neutral. So I can back up slowly on a flat surface (without pushing the accelerator), but if there's a slight incline, it won't move (it'll actually go down the slope). If, on the same slope, I put the car back on Park and then back on Reverse, it'll motion upwards a bit, and then I'll feel something that 'disengages' and then I'm back to neutral feel. No weird noise that I could hear, no gears crunching or anything (which makes me hope it's not the whole tranny that's messed up).
prognosis?
I have a 2001 2.7T Allroad automatic tranny. When I put the car in reverse, it backs up, but if I give it gaz, it's almost as if the car is in neutral. So I can back up slowly on a flat surface (without pushing the accelerator), but if there's a slight incline, it won't move (it'll actually go down the slope). If, on the same slope, I put the car back on Park and then back on Reverse, it'll motion upwards a bit, and then I'll feel something that 'disengages' and then I'm back to neutral feel. No weird noise that I could hear, no gears crunching or anything (which makes me hope it's not the whole tranny that's messed up).
prognosis?
01-05-2011, 10:47 AM
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Ok so I did a quick search, and I have a few ideas what the problem might be, but I'm not conclusive, so here it is:
I have a 2001 2.7T Allroad automatic tranny. When I put the car in reverse, it backs up, but if I give it gaz, it's almost as if the car is in neutral. So I can back up slowly on a flat surface (without pushing the accelerator), but if there's a slight incline, it won't move (it'll actually go down the slope). If, on the same slope, I put the car back on Park and then back on Reverse, it'll motion upwards a bit, and then I'll feel something that 'disengages' and then I'm back to neutral feel. No weird noise that I could hear, no gears crunching or anything (which makes me hope it's not the whole tranny that's messed up).
prognosis?
I have a 2001 2.7T Allroad automatic tranny. When I put the car in reverse, it backs up, but if I give it gaz, it's almost as if the car is in neutral. So I can back up slowly on a flat surface (without pushing the accelerator), but if there's a slight incline, it won't move (it'll actually go down the slope). If, on the same slope, I put the car back on Park and then back on Reverse, it'll motion upwards a bit, and then I'll feel something that 'disengages' and then I'm back to neutral feel. No weird noise that I could hear, no gears crunching or anything (which makes me hope it's not the whole tranny that's messed up).
prognosis?
01-05-2011, 01:52 PM
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My guess is that the problem is with the "B Clutch" in the transmission. See pages 14 and 15 of the Audi 01V and 01L automatic transmission teaching guide. Page 14 says:
"Suppose you have a 01V/5HP19 transmission that’s
slipping in reverse. There are no other problems.
The solenoid application chart shows
shift solenoid N88 is energized. We can rule
out solenoid N88 as the cause since it’s also
energized in 1st, 2nd and 5th gears. These
gears are okay. When we look at the clutch
application chart, we see that clutches B,D and
G are energized, However, clutch B is energized
only in reverse. This would be the most
likely cause of the problem."
"Suppose you have a 01V/5HP19 transmission that’s
slipping in reverse. There are no other problems.
The solenoid application chart shows
shift solenoid N88 is energized. We can rule
out solenoid N88 as the cause since it’s also
energized in 1st, 2nd and 5th gears. These
gears are okay. When we look at the clutch
application chart, we see that clutches B,D and
G are energized, However, clutch B is energized
only in reverse. This would be the most
likely cause of the problem."
Last edited by Mr. Timewise; 01-05-2011 at 02:04 PM.
01-06-2011, 05:08 PM
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Yeaaa, sooooo, back from the garage. Not a fun conversation.
Anyway, thanks for your replies. Mechanic says it's pretty common for these 2.7Ts, something about some sort of rod in the tranny going through some sort of faulty drum. Says when they repair they change the part for one from a 2.8. Whatever it is, there's no going around the fact that the tranny has to come down and go to rebuild.
So either I part with around 2500 of my canuck loonies, or I put it for sale cheap. Anyone interested in a 6000$ 2001 Allroad in Montreal that won't back up too good ;-)
Anyway, thanks for your replies. Mechanic says it's pretty common for these 2.7Ts, something about some sort of rod in the tranny going through some sort of faulty drum. Says when they repair they change the part for one from a 2.8. Whatever it is, there's no going around the fact that the tranny has to come down and go to rebuild.
So either I part with around 2500 of my canuck loonies, or I put it for sale cheap. Anyone interested in a 6000$ 2001 Allroad in Montreal that won't back up too good ;-)
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01-06-2011, 07:16 PM
#8
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I would check with these guys about a rebuild....http://erikssonindustries.com/
the remove & reinstall should be around the $1200 range.
Explain the symptoms, they may be able to offer a second opinion as to the problem as well.
the remove & reinstall should be around the $1200 range.
Explain the symptoms, they may be able to offer a second opinion as to the problem as well.
01-07-2011, 05:29 PM
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Had similar issue possibly,reverse was like a 5 speed but if i shut off and re-start sometimes would drive normal no tranny codes.Turned out to be neutral safety switch.