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2001 Toyota Tacoma Xtracab with 1st-2nd shifting problem
I have a 2001 Toyota Tacoma Xtracab with a 2.4 liter 4-cyl. auto trans w/ 4 spd O/D. Just recently, it started having problems shifting from 1st to 2nd gear. I have drained and changed the fluid and changed the filter twice and last weekend took out the valve body to inspect it. Saw no large metal flakes or anything out of the ordinary, was using an alldata subscription to troubleshoot. Put everything back together with new filter and fluid, same problem. If i start off and accelerate very gently, it will shift from 1st to second fine between 1000 and 2000 engine rpm. However, if I accelerate from a stop it won't shift until 3200-3400 rpm. Is this a 1-2 valve problem, governor valve problem, throttle position indicator or what? I'm really frustrated although it drives fine in other gears and overdrive, and will downshift when the accelerator is punched. Thanks for any help.
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Look for vacuum leaks. There are tons of hoses, replace dried and cracked ones....
The trans shift issue that you describe seems that the trans is being told to hold back the shift, there is a unit at the end of the vacuum tube, AT the trans, called a modulator. They have a rubber diaphram inside that fails and then trans fluid gets sucked into the engine, via this vac. hose. Pull it off and see if any trans fluid comes out...Should be ZERO.
Also, your vehicle must have regular trans service, especially you must change the FILTER. Disk material eventually clogs the filter, then trans fails really fast.
You may consider having a quick lube shop do the trans service, they use a machine that pumps new fluid in while unit is running, totally flushing converter, cooler,and lines...but DO replace the filter.
To be fair, the service suggestion has nothing to do with yoru complaint, necessarily...
Usually burnt and discolored ATF mean pump or torque converter not doing there job or bands and clutches are worn. Shift solinoid or a pressure problem is the problem with 2nd and 3rd gear, Take it to a transmission shop and have them look it over but like I said earlierdiscolored ATF could mean a rebuild.
No 3rd or 4th gear: “3-4” clutches are worn out. R&R. The car is safe to drive (in 2) until you can get it fixed.
Trans shifts into gear harshly, car feels sluggish off the line, No
1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only
available gears, CEL is on: Transmission is either in limp-home mode or
has lost electrical power. If there are lots of error codes in the PCM,
check the under hood fuse that powers the transmission, and if it pops
again, look for a short in that circuit like an O2 sensor harness
touching exhaust. Otherwise, check PCM codes for a particular fault in
the transmission causing the PCM to put it in limp-home mode.
No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD
and locks the converter : Shift A solenoid failed. Easy fix in the pan.
Or a wiring problem from PCM to trans.. or PCM.
Check to see if your transmission is in the limp mode, which would only give you 2nd, 3rd and reverse gears. No 1st or 4th gear.
yep, sounds like your transmissions on its last leg, mabye you can get by, by starting in 2nd, if you have the option lol, but auto tran's are pretty cheap on ebay or try www.supraforums.com seen one for 300$
I have a 1999 Ram B 1500 Van, auto transmission, 5.9 L engine.
Same problem, trans hesitates in 2-3 upshift, sometimes 1-2
to 2-3 upshift. Posts trouble code P1756 - Transmission Govenor pressure too low at below 15 to 20 Psi. Transmission pump shot or valve body leak stops trans from reaching proper pressure to shift, which is minimum 15 Psi.
Either trans is leaking in valve body, valve is stuck, shift solenoid on valve body is sticking, or pump is shot.
HI !!! there usully one problem w/ this when thoesnt shfti right from firs to the second also takes more time is the Solenoid Pack in Rey. have computer tested and it wil tell you which has to be changr all this work inside the trnsmsion
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