Rough downshift after fluid/filter change

2003 Dodge Grand Caravan, 3.3L engine, 30K miles

On Saturday I changed the transmission fluid and filter on our van.
Relatively straightforward job. Used Mopar ATF+4 fluid and Mopar filter.

Ever since, the downshift from OD to 3 has been fairly rough - more like a
bump than a smooth downshift. It was noticeable before, but now it really
gets your attention. All other shifts - up and down - are smooth.

Is this normal? Would the new fluid properties cause a change like this?
BTW, I only changed the fluid that drained from the pan.

Craig
[to reply directly, change the VERB to a NUMERAL]

On Thu, 10 Feb 2005, Craig Williams wrote:

> 2003 Dodge Grand Caravan, 3.3L engine, 30K miles On Saturday I changed
> the transmission fluid and filter on our van. Relatively
> straightforward job. Used Mopar ATF+4 fluid and Mopar filter. Ever
> since, the downshift from OD to 3 has been fairly rough - more like a
> bump than a smooth downshift. It was noticeable before, but now it
> really gets your attention. All other shifts - up and down - are
> smooth. Is this normal?

Disconnect the battery for at least 5 minutes, reconnect, then do the fast
learn procedure described under "Retraining your Chrysler Transmission" at
http://www.allpar.com/fix/trans.html

DS

Do you have proper fluid level? Filter insatlled correctly?
Larry
"Daniel J. Stern" > wrote in message
.umich.edu...
> On Thu, 10 Feb 2005, Craig Williams wrote:
>
>> 2003 Dodge Grand Caravan, 3.3L engine, 30K miles On Saturday I changed
>> the transmission fluid and filter on our van. Relatively
>> straightforward job. Used Mopar ATF+4 fluid and Mopar filter. Ever
>> since, the downshift from OD to 3 has been fairly rough - more like a
>> bump than a smooth downshift. It was noticeable before, but now it
>> really gets your attention. All other shifts - up and down - are
>> smooth. Is this normal?
>
> Disconnect the battery for at least 5 minutes, reconnect, then do the fast
> learn procedure described under "Retraining your Chrysler Transmission" at
> http://www.allpar.com/fix/trans.html
>
> DS

Fluid was at low end of range, but on scale. I added a little to bring
it up to the upper end of the range. The filter was fairly easy - no
screws holding it in, just two plastic inserts that snapped into holes
on the underside of the transmission. When removing the old filter, I
noticed that the old o-ring didn't come out, so I removed it by hand.
The new filter had its o-ring intact.

I'll try the "retraining" procedure tonight.

Craig

jdoe wrote:
> Do you have proper fluid level? Filter insatlled correctly?
> Larry
> "Daniel J. Stern" > wrote in message
> .umich.edu...
> > On Thu, 10 Feb 2005, Craig Williams wrote:
> >
> >> 2003 Dodge Grand Caravan, 3.3L engine, 30K miles On Saturday I
changed
> >> the transmission fluid and filter on our van. Relatively
> >> straightforward job. Used Mopar ATF+4 fluid and Mopar filter.
Ever
> >> since, the downshift from OD to 3 has been fairly rough - more
like a
> >> bump than a smooth downshift. It was noticeable before, but now
it
> >> really gets your attention. All other shifts - up and down - are
> >> smooth. Is this normal?
> >
> > Disconnect the battery for at least 5 minutes, reconnect, then do
the fast
> > learn procedure described under "Retraining your Chrysler
Transmission" at
> > http://www.allpar.com/fix/trans.html
> >
> > DS