Re: [DML] Re: Questions on automatic transmissions

["Videobob Moseley" <videobob@xxxxxxxxxxx>]

No, I have never done anything to it, I know it was better a year ago when I 
got the car
but I have slowly lost a lot of my power as the trans slips.

Can any local tranny shop who is familiar with Volvos work on this 
transmission?
Does it need to be rebuilt?
Should I change the fluid?
What should I do about it, and if I do nothing what will happen?

-VB

>From: Bob Brandys <BobB@xxxxxxxxxxxxxx>
>Reply-To: dmcnews@xxxxxxxxxxxxxxx
>To: dmcnews@xxxxxxxxxxxxxxx
>Subject: Re: [DML] Re: Questions on automatic transmissions
>Date: Thu, 16 Dec 2004 17:41:43 -0600
>
>
>
>Bob,
>
>If your trans is burnt, then the rubber seals have hardened and until
>they warm up they will not seal.
>
>However, the hard shifting sounds more like the proportioning valve is
>not working properly.  Have you ever replaced the computer?  It may be
>you proportioning valve is not working right because of a bad computer.
>
>BOB
>
>On Dec 16, 2004, at 12:50 PM, Videobob Moseley wrote:
>
> >
> >
> > Since we are in the thick of this topic, I would like to talk about
> > the way
> > my car rides.
> > My automatic shifts like a mule just kicked you.
> > It winds way up and then jerks into gear with a slow slingshot effect.
> >
> > One of my main problems is that it will not shift into 3rd until it is
> > warmed up good.
> > If I take off on a cold day, I will have to drive in 1st gear for a
> > while
> > otherwise it
> > will slip gear and the motor will just spin until I put it into first
> > and it
> > will catch.
> > Once I get it up to a high RPM I can shift up to 2nd and it will go,
> > but if
> > I put it in
> > 3rd it will just slip, unless I get on the highway and punch it.
> > Once I get going real fast, lets say 70 in 2nd gear then I can usually
> > put
> > it in 3rd
> > and it will catch....but sometimes it will simply drop back and forth
> > from
> > 2nd to 3rd.
> > Once the car is warmed up and finally drives smooth in 3rd, it will
> > stay
> > like that as long
> > as you are driving it around.
> >
> > I have had people look at the trans fluid and smell it, and although
> > it is
> > still red they tell
> > me it smells burned, and I have been told not to replace the fluid
> > because
> > if I do
> > it will melt the inside of my transmission.
> > Of course Stephen Wynne told me that was BS and to go ahead and do it.
> > So I don't know who to believe.
> > But as far as I know the car has never had a trans service in 35K of
> > life,
> > but I am
> > afraid to do it.
> > I just dont know what to do about it because I can not afford to send
> > it to
> > Stegar.
> > I have had local trans shops tell me that they can rebuild it for me
> > for
> > about $800
> > but of course Stegar and Grady both tell me that these trans shops only
> > "think they know what they are looking at" and "could not possibly do
> > it for
> > that".
> >
> > All I know is that I have a serious problem with the transmission and
> > it is
> > running like crap
> > because of it, it is robbing me of power and making me rev the engine
> > too
> > much.
> > On cold mornings like we have had lately, I need to warm up the car for
> > about 20
> > minutes before I can drive it.
> >
> > So what should I do?
> >
> > - Videobob
> >
> >> From: "Harold McElraft" <hmcelraft@xxxxxxx>
> >> Reply-To: dmcnews@xxxxxxxxxxxxxxx
> >> To: dmcnews@xxxxxxxxxxxxxxx
> >> Subject: [DML] Re: Questions on automatic transmissions
> >> Date: Thu, 16 Dec 2004 12:28:12 -0000
> >>
> >>
> >>
> >>
> >> An accurately setup auto shifts nice and smooth hot or cold - in
> >> really cold weather the shifts are a little smoother - almost
> >> unnoticeable - warmed up - noticeable but smooth - no banging or
> >> jerking. I notice the change in engine sound more than anything
> >> along with more getup, especially at WOT. Never notice down shifting
> >> at coasting to stops or stopping. Down shifting from throttle
> >> response is firm but smooth and up shift the same - I try never to
> >> let the trans have to go through two gear shifts at once - i.e.
> >> first to third or third to first (I just visualize too much stuff
> >> going on in there for the by-pass of gears to be good for it).
> >>
> >> To get what I consider a really smooth trans took me a few years of
> >> working with an auto trans that was abused in its early years and
> >> run for some time with the computer screwed up.
> >>
> >> Three critical adjustments: The trans throttle cable, the computer
> >> working correctly and the vacuum module. And, the engine has to be
> >> working and idling correctly. In terms of problem areas I'd say
> >> first computer, then engine running correctly, throttle adjustment,
> >> vacuum module. Last, trans internals.
> >>
> >> The whine - is it in first or at the shift 1-2 only? That sounds
> >> like a trans filter clogged up or air in the system. Have you
> >> serviced the trans lately? The harsh down shift is a symptom of a
> >> faulty computer but an engine with a fast idle or slow to idle
> >> symptom will cause a similar issue.
> >>
> >> Diagnosing a D trans is really an art as much as a science in my
> >> experience. But, you have to be sure you're dealing with one problem
> >> not two or more. That requires checking everything one at a time.
> >>
> >> Harold McElraft - 3354
> >>
> >>
> >>
> >> --- In dmcnews@xxxxxxxxxxxxxxx, Enid/Jeremiah
> >> <hispanicangeleyes@xxxx> wrote:
> >>>
> >>> Hey everyone,
> >>>
> >>> A couple questions.  I never really paid any attention
> >>> to it, but I was wondering how a ideal working
> >>> automatic transmission shifts.  Obviously,
> >>> 1st->2nd->3rd, but what is its behavior?  Is it
> >>> supposed to shift really hard and firmly, or does it
> >>> shift softly like todays modern cars where one can
> >>> barely feel a shift at all?  Would a change in
> >>> temperature (summer vs winter weather) have a effect
> >>> on the shifting patterns?  Also, when the automatic
> >>> transmission downshifts, should you be able to really
> >>> feel the downshifts or should it be really smooth and
> >>> almost unnoticeable?  My car shifts up very firmly,
> >>> and it downshifts from 2nd to 1st very firmly, but I
> >>> don't really detect any downshifting from 3rd to 2nd.
> >>>
> >>> One last thing.  Lately with the morning temperature
> >>> in the mid 20's, I've noticed a high-pitched whine
> >>> when going from first to second.  This is if the car
> >>> is driven with no warm-up idle time.  Today, I let it
> >>> warm up to about 160 degrees, and it doesn't make this
> >>> noise driving down the street with warm up time.  Is
> >>> this anything to take note about, or is this just how
> >>> the car behaves when driven from a dead cold start in
> >>> 25 degrees?
> >>>
> >>> Thank you for your time.
> >>>
> >>> Jeremiah
> >>>
> >>>
> >>>
> >>> __________________________________
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