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2000 Bravada reverse question
We bought this car with 90000 miles on it about a year ago. From the
very beginning we started to notice a slight shudder when backing up. We took the car in to a friends place and he changed the blue fluid in the transfer case. He said that there was a problem with the All Wheel Drive function which affects the transfer cases on these and said "lets try the fluid change first and see if it helps". After doing the change there seemed to be little difference but eventually the problem seemed to all but dissappear. We were very encouraged. The car had been fine until recently when this transmission had lost reverse, which I am told is apparently a typical and unrelated problem with these. We had the trans rebuilt and it seems to be OK except for the fact that the slight shuddering problem in the drive train is now occurring again sporadically only in reverse, but not all the time when backing up. When it happens it seems to be worse if the wheels are turned but it it so intermittent that it is hard to say if the problem only occurrs when turning or it may occur when backing up in general. Like I said sometimes it doesn't happen at all. So far I have just never noticed it when straight backing up. So my questions a 1. What is happening here? 2. Did the original problem ruin reverse on the transmission and could this occurr again? 3. We don't really use 4WD. Can it be disabled thereby saving us a possible costly future repair again? 4. Might changing the blue fluid help again? 5. Is there a solution that will really "fix" this problem or is this just a poor design. Please don't worry about providing as much technical information as possible. I really want to understand this problem and will sincerely appreciate it all. Thanks, Lenny Stein. |
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#2
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2000 Bravada reverse question
Thewre were issues with the awd transfer case, there are tsb's relating to
this condition that can require replacing the encoder and/or reprogramming the pcm. The truck is in awd all the time remember. It is also possible the locking diff is is binding , an experienced GM tech needs to feel this happening for an accurate diagnosis. > wrote in message oups.com... > We bought this car with 90000 miles on it about a year ago. From the > very beginning we started to notice a slight shudder when backing up. > We took the car in to a friends place and he changed the blue fluid in > the transfer case. He said that there was a problem with the All Wheel > Drive function which affects the transfer cases on these and said "lets > try the fluid change first and see if it helps". After doing the change > there seemed to be little difference but eventually the problem seemed > to all but dissappear. We were very encouraged. The car had been fine > until recently when this transmission had lost reverse, which I am told > is apparently a typical and unrelated problem with these. We had the > trans rebuilt and it seems to be OK except for the fact that the slight > shuddering problem in the drive train is now occurring again > sporadically only in reverse, but not all the time when backing up. > When it happens it seems to be worse if the wheels are turned but it it > so intermittent that it is hard to say if the problem only occurrs when > turning or it may occur when backing up in general. Like I said > sometimes it doesn't happen at all. So far I have just never noticed it > when straight backing up. > So my questions a > 1. What is happening here? > 2. Did the original problem ruin reverse on the transmission and could > this occurr again? > 3. We don't really use 4WD. Can it be disabled thereby saving us a > possible costly future repair again? > 4. Might changing the blue fluid help again? > 5. Is there a solution that will really "fix" this problem or is this > just a poor design. > Please don't worry about providing as much technical information as > possible. I really want to understand this problem and will sincerely > appreciate it all. Thanks, Lenny Stein. > > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#3
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2000 Bravada reverse question
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#4
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2000 Bravada reverse question
Is auto trak fluid something you add to and use in conjunction with
Dextron 3 (like the additive you use in a LSD or posi rear with 90W), or is it something you use completely in place of Dextron 3. ? |
#5
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2000 Bravada reverse question
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#6
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2000 Bravada reverse question
I asked him about that and he never touched the fluid in the Tcase. He
only rebuilt the transmission. |
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2000 Bravada reverse question
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#8
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2000 Bravada reverse question
Marsh Monster wrote:
> Then you can tell him I said he was a half-assed tranny tech. Why? Ian |
#9
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2000 Bravada reverse question
shiden_kai wrote: > Marsh Monster wrote: > > > Then you can tell him I said he was a half-assed tranny tech. > > Why? > > Ian ========= ========= How did he know the fluid was good, or that it wasn't low, or that it was the right type? if he didn't mess with it....a little bit? ~:~ marsh |
#10
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2000 Bravada reverse question
Marsh Monster wrote:
> How did he know the fluid was good, or that it wasn't low, or that it > was the right type? > > > if he didn't mess with it....a little bit? I thought the OP said the tech said he didn't touch the t/case fluid. Which is quite possible, if you use something in place of the rear driveshaft to keep the fluid from leaking out while removing the t/case. It's not necessary to drain and fill the t/case when removing it to get at the trans. I know that I certainly wouldn't be fooling around with the t/case if I was repairing the transmission for no reverse. Pull the t/case out, put it to the side and get on with repairing the trans. I would check the t/case fluid level when re-installing, that would be only prudent. As another poster mentioned, there are bulletins out that deal with the crowhopping issue. Replacing a sensor in the encoder motor usually fixes the problem on the AWD models. Ian |
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