Question about 1994 Buick Century

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Look for vacuum leaks, Test the vacuum modulator to see that it holds vacuum.

Posted on Mar 18, 2011


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Had the trans flushed and now it wont upshift unless I let off the throttle.

what oil did you put in should be this type Mercon or Dexron II

Feb 22, 2014 | 1995 Jeep Grand Cherokee

1 Answer

Wont shift out first

it is probly in the valve body in the trans

Nov 13, 2013 | Dodge Cars & Trucks

1 Answer

1st shift in the morning is fine, after the 1st stop, the trans will not shift out of 1st unless i do a full let off of the thottle. Does not produse any error codes. 100,000 miles, f-350, 7.3 L diesel

check your fluid level first then your shift linkage if that is all ok change your transmition filter and clean magnent in pain when you do so also check your kickdown and upshift senors ect if none of that takes care of your problem your going to want to go see amco or trans shop unless you have a really good manual for trans repair and hands on trans experince

ps if you find big chunks of metal in pan just look for new trans

if this helps please give me a good rating

May 09, 2011 | Ford F-350 Cars & Trucks

1 Answer

I have 02 t&c. wont upshift and no speedometer. changed tcm, input and output sensors multiple times, still no upshift or speedo. no codes are showing after tcm change.

Ok after a tcm change and sometimes after a battery replacement you will need to program the pinion factor(tire size)into the tcm.Without this information the tcm cannot calculate the math to give you speedometer operation.You will need to take to a trans shop or dealer.You will need to do a battery disconnect procedure,quick learn procedure and program in the tire size.About and hours worth of labor unless you find a guy like me that would take the 5 minutes and do it for free.Good luck!

Mar 28, 2011 | 2002 Chrysler Town & Country

1 Answer

My transmission takes a while to shift around 40 mph. how can i fix it?

is this problem only when engine cold or happens also or only when hot?most simply ,shifts are determined by TPS(throttle position sensor)on engine throttle body,speed sensor(s)on transmission,and internal valve body.Trans should be serviced every 40,000km,we find that running trans on a flush machine often restores shifts and part throttle kickdowns if fault is not mechanical but caused by contaminated fluid as it gets most of the dirty fluid out of all the areas that a drain and filter change wont do.It is usually is best to get trouble codes checked for engine and trans.Which shift is it delayed in,2-3,3-4,does coming off the throttle help it change?is it upshift or downshift that is problem.This info will help in pin pointing problem better.hope this helps.

Feb 11, 2011 | 1999 Ford Explorer

1 Answer

My truck don't shift. Has one forward and reverse. It is a 2500 1992.

Check transmission governor which is a gear driven metering device for the valve body.Its the old school speed sensor.Remove governor and inspect for stripped gears or stuck valves. This fluid circuit is critical for trans upshift...also check TV cable at the carburetor....this is the old school throttle position sensor for the trans control valve body.

Sep 18, 2009 | 1992 Chevrolet C/K 2500

1 Answer

My 1986 chevy camaro will not upshift from first gear


Jul 15, 2008 | 1995 Chevrolet Camaro

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