I have a 2000 Chevy Silverado, v-6, 171,000 miles, automatic. Tranny
works fine for about 20 minutes and then starts to shift really fast
and hard. When I shut it off for a minute or two, it works as if
nothing happened.

Any ideas on what the problem may be?


Thanks,


Hank

Electrical. sorry, I will be totally no more help than that.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Hustlin' Hank" <ninebal310 (AT) aol (DOT) com> wrote

I have a 2000 Chevy Silverado, v-6, 171,000 miles,
automatic. Tranny
works fine for about 20 minutes and then starts to shift
really fast
and hard. When I shut it off for a minute or two, it works
as if
nothing happened.

Any ideas on what the problem may be?


Thanks,


Hank

"Hustlin' Hank" <ninebal310 (AT) aol (DOT) com> wrote

Hank:

I place my bet on the 1-2 shift solenoid or the 3-4 shift solenoid OR
BOTH of them. They are known to go bad after some peroid of time and
I've issued a bunch of them to technicians. Thermal runaway is the
culprit. After the solenoids reach operating temperature, the wire
coil in the solenoid shorts out and causes the solenoid to engage even
though it shouldn't. (My best guess).

If you're gonna try to fix it yourself, this is the least expensive
parts replacement that you can try. Be sure to change the filter
while you're there since you'll need to R & R the pan to replace the
solenoid(s).

Both the 1-2 and 3-4 solenoids are the same part number so you could
just buy one and try it in the 1-2 spot first and then remove the pan
a second time if a test drive determines the problem still isn't
fixed.

Good Luck!
--
Steve Spence
Independent AMSOIL Dealer
AMSOIL - The "Once A Year" Oil Change
Unemployed Car Guy - Trying To Earn A Living
35 Years of G.M. Parts Experience
URL: http://synthetic-oil-tech.com/1690163
Email: amsoil1 (AT) charter (DOT) net

On Apr 4, 6:32*am, "Hustlin' Hank" <ninebal... (AT) aol (DOT) com> wrote:


I might be wrong, but there might be a TSB on that trouble. I heard on
our local " Car Care ' radio program,
that a overpressure relay, goes nuts, and resets when you shut off and
restart. I think its inside the vavle assembly, and you
have to drop the pan to get at it. I might even be on a different
vehicle, but its only my two cents worth! .

<acforn (AT) zoominternet (DOT) net> wrote

On Apr 4, 6:32 am, "Hustlin' Hank" <ninebal... (AT) aol (DOT) com> wrote:


I might be wrong, but there might be a TSB on that trouble. I heard on
our local " Car Care ' radio program,
that a overpressure relay, goes nuts, and resets when you shut off and
restart. I think its inside the vavle assembly, and you
have to drop the pan to get at it. I might even be on a different
vehicle, but its only my two cents worth! .


I found the link below, but it doesn't describe exactly what the OP is
complaining about, but it's close

http://www.aboutautomobile.com/TSB/2000/Chevrolet/Chevrolet+Truck

--
Steve Spence
Independent AMSOIL Dealer
AMSOIL - The "Once A Year" Oil Change
Unemployed Car Guy - Trying To Earn A Living
35 Years of G.M. Parts Experience
URL: http://synthetic-oil-tech.com/1690163
Email: amsoil1 (AT) charter (DOT) net

On Apr 4, 9:18�pm, "Steve" <amso... (AT) charter (DOT) net> wrote:



To All,

Thanks for the advice and link. I think I am going to change the fluid/
filter, modulator valve and the shift solenoids. I'll let you know how
it turns out at a later date.

Hank <~~~don't know trannies

Hustlin' Hank wrote:


No modulator! When you get the pricing on the shift solenoids you'll
probably change your mind about that too. I believe there is a TSB on a
problem similar if not exactly like your. I'll look and see and get back
to you.


nobody #1

"nobody #1" <rnddmauck (AT) comcast (DOT) net> wrote

The TSB is already posted for his vehicle - see the link above.

The AC-Delco part number for the 1-2, 3-4, or 3-2 shift solenoid is
214-1878 and has a price of $28.50 each through an AC-Delco parts
store. Since they are all three the same and only one of them is
likely acting up (if the TSB doesn't fix it), only one needs to be
purchased - but the pan might have to come off multiple times to find
the one that is causing the problem - might be 8 - 10 quarts of wasted
ATF unless it can be captured and reused.

Please see: www.acdelco.com and look up the parts for yourself.

--
Steve Spence
Independent AMSOIL Dealer
AMSOIL - The "Once A Year" Oil Change
Unemployed Car Guy - Trying To Earn A Living
35 Years of G.M. Parts Experience
URL: http://synthetic-oil-tech.com/1690163
Email: amsoil1 (AT) charter (DOT) net

Steve wrote:


There is another TSB I see frequently about a loss of power to the
instrument cluster and transmission. Shift solenoids can usually be
checked with an ohm meter.


nobody #1