Question about Hyundai Santa Fe

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My 99 model auto transmission starex fails to shift at the right time as i increase rpm so its speed is somewhat slow and it increase speed for about 8 secs.

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The promlem is prolly in ur transmission

Posted on Apr 05, 2011

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I Have a 2007 Suzuki Forenza with a winding in the Transmission the code PO783


get it fixed, are you going to diagnose and repair and A/T?
that car is a 1/2 GM/ Daewoo car. a sad mix of parts. (sell it? i would )
the service book is here. $4
This is called an FSM.
https://suzukipitstopplus.com/Products/1068-2007-forenza-reno-service-manual.aspx

783 (p07xx means tranny issues)

quote FSM:
Trouble Code: P0783 (2.0L L4 VIN - Auto)
3 - 4 Shift Malfunction Print this code dataprint_icon_codes.gif comments in (xxxx)
Trouble Code Conditions: (preconditions before test)
Transaxle oil temperature is greater than -10 °C (14 °F). Selector lever is not N (Neutral), P (Park) position. (warm , in gear)
System voltage is greater than 9 V.(car battery not dead)
No input speed error DTCs P0715, P0716 and P0717.
Speed sensors not dead.
Output speed is greater than 256 rpm. (tail shaft rpm (speed)
Input speed is greater than 400 rpm. (engine rpm after clutch)
3 - 4 gear shift is active. (the TCM commands shifts to 4th)
Possible Causes:
  • Circuit to solenoids bad.
  • ECM, bad.
  • TCM bad or inputs wrong.
  • end quote.
Comments:
this means, in pure physics.:
the transmission slip's
what that test failure means it bar stool talk is this.
I shafted to 4th but the MPH is too slow, so the transmission
is not shifting to 4th , or it slips

any mech would drive the car first. (did he?)
and flog it up hills (in Kansas? omg)
TO SEE, if it slips in 4th or fails to shift at all.

  1. fresh ATF? and filter? serviced and levels good on A/T
  2. is the 4th gear command to the shift solenoid good.?(logic)
  3. if trans slips? (fails FSM book stall tests) bad tranny.
  4. if the trans fails stall , check line pressure per FSM.
like that, and more, lots to say on A/T
If in uSA find a real , shop, with ASE techs. and win.

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Why won't my 97 dodge caravan auto transmisson shift as speed increases, transmission fluid level is good?


Check modulator make sure vacuum hose has vacuum present and connected at both end,s of pipe.

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Vehicle drive smooth then all of a sudden the wheels starting to tighten car slow down.


what makes you thing the tires/wheels tighten (felt by hand off ground?)
my guess , you meant it seems. like???
1: lost engine power?
2: transmission not up shifting?

is this a auto A/T or manual M/T tranny,
if A/T , you need to look at the engine RPM when you lose
power (acceleration on demand)

RPM rises, car dont move faster ,this is tranny slip.
RPM fails to increase, and speed, up hills. this is called lost engine power.
lost engine power can be caused by , bad spark (tuneups skipped?)
or weak fueling.
weak fueling too can be cause by skipping the fuel filter step in the tune up list.


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Transmission surge at cruise


check the rpm and road speed when this happens . The cruise control will increase to keep RPM constant but as the road speed drops the auto may be shifting down and as the rpm increase it shifts back before the rpm adjusts. You can override a cruise control in this situation by simply pressing down on the accelerator to maintain the power setting and road speed and when the situation is passed and you take your foot of the accelerator the cruise control will return the system to the set position without you needing to do anything

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2003 hyundai starex mt, body vibration occurs everytime i shift the gear, (up and down) what is the ideal speed before i shift the gear for this car, thanks in advance


Hi M, Please describe in more detail what problem you are experiencing. Vibration is not correct at any speed. The gears can be changed at more or less any speed, as long as the engine maximum RPM is not exceeded and at slow speeds the engine does not labour by selecting too high a gear. Regards John

Sep 21, 2012 | Cars & Trucks

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99 acura drives slow w/ no tranny shift & no speed-o-meter


Vehicle Speed Sensor (VSS) or check the transmission control module for burned capacitors, etc.

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1997 chey pu auto trans 1st and 2nd shift good drive doesn't shift until rpm's are 3500-4000 rpm


Do you get a check-engine light, or does the transmission O/D light flash? Many times, this is due to a speed sensor on the transmission. When the sensor goes, the transmission has to do default shift timing and it will shift very late. Usually, this will set a code in the onboard computer.

Sep 01, 2009 | 1997 Chevrolet Blazer

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Transmission hesitates shifting into second and perhaps third gear when driving slow. When acceleration is positive transmission shifts smoothly. Reference "99 Mercury Transmission" as Subject when


Several things could be causing your problem:
  1. Auto transmission fluid is low
  2. Auto transmission fluid needs changing; this is an area that gets neglected by a lot of people;check the fluid and if its brown or gives off a burning smell, it needs changing. Very old transmission fluid will cause slipping in the transmission; if this is the case, it should be changed along with the filter
Hope you find that this answers your question. Best of luck.
Greg

p.s. If you have the fluid changed, make sure it's done from the tranmission pan, not through the filler tube; siphoning through the filler tube can be hazardous to the transmission, especially cars with a lot of miles

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GMC pickups


1-2 Shift @ +/- 250 RPM Output Shaft Speed 2-3 Shift @ +/- 200 RPM Output Shaft Speed 3-4 Shift @ +/- 150 RPM Output Shaft Speed % of TPS 12 25 50 12 25 50 12 25 50 1999 3.73 454 599 1012 826 1053 1652 1198 1549 2499 2006 3.73 391 568 960 705 940 1568 1000 1391 2370

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