Passing Gear-Downshifting of Transmission


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Passing Gear-Downshifting of Transmission

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solis6924
Novice

Feb 21, 2007, 10:18 PM

Post #1 of 5 (3151 views)

Passing Gear-Downshifting of Transmission	Sign In

When I am driving around 35-40 mph I try to press on the pedal for the transmission to downshift but it doesn't do so. How can I remedy this situation?

DanD
Veteran / Moderator
DanD profile image

Feb 22, 2007, 6:57 AM

Post #2 of 5 (3148 views)

Re: Passing Gear-Downshifting of Transmission	Sign In

Year
Make
Model
Engine size
Three or Four Speed Transmission?

Canadian "EH"

solis6924
Novice

Feb 23, 2007, 6:21 AM

Post #3 of 5 (3141 views)

Re: Passing Gear-Downshifting of Transmission	Sign In

My vehicle is a 1994 Buick LeSabre V6-231 3.8L VIN L SFI. How can I tell if it is a three or four speed transmission? I have had this happen before about two years ago. Some sensors were replaced by an auto shop. Thanks for your help.

DanD
Veteran / Moderator
DanD profile image

Feb 23, 2007, 10:06 AM

Post #4 of 5 (3136 views)

Re: Passing Gear-Downshifting of Transmission	Sign In

I guess at this point it doesn’t really matter whether it’s a three or four speed but have a look at your shifter; how many forward gear positions does it show?
As for the downshift it is controlled by the PCM (computer) and you may need to have it scanned for codes and data. The PCM looks at a number of sensors to determine whether a different gear is required. Which sensor to cure this is anyone’s guess until it has been scanned? It may also be a solenoid that is not functioning?
Dan.

Canadian "EH"

solis6924
Novice

Feb 23, 2007, 8:29 PM

Post #5 of 5 (3127 views)

Re: Passing Gear-Downshifting of Transmission	Sign In

Thanks.

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