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Why transmission keeps down shifting - Cars & Trucks

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Many possible reasons. Vacuum leak, mis-adjusted trans cable, bad speed sensor, clogged trans filter, just to name a few.

Posted on Dec 02, 2014

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Shifts hard from 2nd to 3rd recently changed fluid and filter also down-shifting


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Jan 01, 2016 | Cars & Trucks

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Car dont takeoff on drive pocition,so i have to go down on 2 shift then shifting manual to drive an keep roning normal.


if the car move correctly in all other gears you have a bad transmission if the shifter is loose with a column shift replace the column if the shifter is not loose you have to adjust the linkage at the transmission

Dec 25, 2009 | 1996 Mercury Sable

1 Answer

99 dodge ram that jerks between 40 and 50 mph


Bring it back to the transmission shop and have them test drive it with the scanner to see if the Throttle Position Sensor (TPS) needs to be replaced. A worn TPS will case the transmission to have shifting problems, the TPE sends voltage signals to the PCM and will control the transmission shift points and firmness. If the TPS has a flat spot and the voltage is down at the point where the transmission needs to shift, there may be a conflict of shift program and needs to be addressed. Good luck and keep me posted.

Dec 08, 2009 | 1999 Dodge Ram 2500 4WD

1 Answer

Tranny wont shift out of 3 gear it drives fine just wont shift in to overdrive or when you punch it it wont shift down


Is your tow/haul button on? If not, it could be activated erroneously. It'll keep it from shifting into overdrive and locking the torque converter, and also keeps the transmission from shifting more often. If this isn't the issue, then you'll have to look into your computer, as the transmission shifting is controlled by the computer. The transmissions were the weak points on these trucks; only good for max 200000 miles, so if you're getting close, keep that in mind.

Nov 07, 2009 | 2001 Chevrolet Silverado

1 Answer

03 tiburon 5sp i shift from 1st thru 4th if i


The slave cylinder for your clutch has a valve in it, which keeps the clutch from engaging too quickly. The purpose is to keep you from just dumping the clutch and wreaking havoc on your transmission. If you're confident that you don't need that extra safety device in there, you can remove it, just google slave cylinder valve removal. It will give your clutch more of an aftermarket feel.

Oct 02, 2009 | 2003 Hyundai Tiburon

1 Answer

1996 Tahoe error code P0700 detected at PepBoys


P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2) P1192 Post-catalyst Fuel Trim System Bank 1

Replace the O2 sensor after the catalytic Converter and check to make sure the wire harness and clips are not damaged. Also check the O2 sensor fuse in the fuse panel to make sure there not blown. 
As for the p0700 code is a generic code and the ECM needs to re-calibrated for the performance upgrade in your transmission. It's common to happen when there are changes like the transmission fluid pressure has been altered which would give it a better and firmer shift, but the transmission reads the higher line pressure as a problem. If you take it to a good transmission shop with a tech2 scanner, the tech2 can change the transmission ECM parameters and that way it will recognize the higher transmission line as a norm. 
Have done a few upgrades on the 4L60E with a common swap of the servo's with a corvette servo's ($45.00) to firm up the shift and raise the transmission line pressure to keep the slipping to a minimal and also bring down the shift points at WOT on the 1st-2nd shift to get going a bit faster (used Tech2 scanner). 
Good luck and keep me posted, be glad to help.

Jul 22, 2009 | 1996 Chevrolet Tahoe

1 Answer

1993 olds achieva-gears won't shift-what sensors on transmission


Had this problem when I rebuilt my engine. Turns out, that I had plugged back in a sensor that was previously unplugged. There is a known manufacturer's defect on some Achievas where a sensor on the transmission was mounted upside-down. Symptoms caused by this are primarily the car staying in gear (and thus stalling) when stopped, and failing to downshift while slowing down. Just unplug this pesky sensor, located roughly underneath and to the battery side of the throttle body. Be careful, though, because I don't know if running long term in this configuration will lead to transmission damage (although my transmission doesn't show any signs of troubles now that the thing is disconnected.)

Apr 22, 2009 | 1993 Oldsmobile Achieva

1 Answer

1993 Ford Thunderbird w/5.0L engine transmission shift problem


hey check your tv cable adjustment type it in in google its hard to explain where it is but google will tell you where it is and how to adjust it

Jan 18, 2009 | 1993 Ford Thunderbird

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