Shift solenoid 2000 Isuzu Rodeo shifting from 1st to 3rd only when it is cold. After it warms up rides smooth as glass. Have taken to several mechanics and all have told me something different but all with transmission. The last guy said thought it was a shift solenoid. How do I know who is right?

possible dirty transmission oil
could be a problem wire to the servo/solenoid

we cant guess your drive line, not now or ever.
so why ask. us?
my guess you mean the car drives in 1st gear but will not upshift,
and flares, in a false neutral.
wont and want is speed wrong 2 times, why?
Is car with TOD? torque on demand option, we cant see the dash board, we be like blind.
check fluild levels yet,
get the box serviced last decade, (a full flush and filter,) sure no.
check fuses, maybe car has TCM that cant up shift due to fuse blown.
and last did you scan it, if not why not
that be 3rd step after levels, fuses, then scan.
if the TCM cant see sensors, it cant upshift,
TCM is the tranny brain.

what isuzu is this, model car or truck
no model stated. (wild guess RODEO)
no year stated, 1991 to 2001 used.
no engine size state or of gas(petrol) or diesel
zero input just 4l30e box, lots of those
so Ill daftly guess.car
it's a car a ,(see list at end)
and has TCM that shifts those solenoids.
check fuses yet?
scan it yet, scan it to see all those TCM errors yet?DTC P07xx errors>
seems not.
why change the solenoids.??? hard work for a guess.


symptoms, decoded
hash shifting.
only when it downs shifts, but all lower gears?
or 3>2 only.
the Tcm SHIFTs the box.
it shifts based on
speed
load
and driver demands.
this are all sensors. every one.

just like on new cars.
the TCM (brain) can go to limphome mode
and guess what?, it will shift funny,for sure.
crude as h3ll and may skip gears (and more)
that you think are harsh but in fact the skipping gear is the cause ,harsh is effects.

All modern car ,needs a scan tool to work all cars
i guess you dont know that.?

scan it
get it scanned
buy the tool.
rent it.
no car stated, so can't wax too savvy!
not at all.
is car in USA?


the book shows this.
"High Flow" Pulse Width Modulated
Solenoid (for 3-2 Downshifts Only)
id bet, limphome mode cancels this modulation...!

runs highest/newest # DEXRON fluid, (VI)
are levels at spec. not overfilled, using correct method of the BOOK.???

fits:
1998–2000 Isuzu Amigo
2002–2003 Isuzu Axiom
1999-2001 Isuzu VehiCROSS
1991–2003 Isuzu Rodeo
2001–2003 Isuzu Rodeo Sport
1990–2002 Isuzu Trooper

Did the problem exist before you changed the fluid? you can try some conditioner to see if the internal seals may be a little tired.

1-2 shift is delayed and harsh, may not shift into OD: Check TPS for smooth and linear electrical response over the entire range of motion. If not, replace or EPC (Electronic Pressure Control) solenoid failed. Easy fix in pan. Fix as soon as possible or hard parts will eventually break. Start with the simple and check the transmission fluid level and condition.Secondly, put a line pressure gauge (or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve (easy fix in pan).
No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Good luck and keep me posted.

CHECK BRAKE LIGHT SWITCH FUSE AND THE BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID FUSE.IF BOTH FUSES ARE GOOD YOU HAVE A FAULTY BRAKE LIGHT SWITCH OR BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID.

Check the kick down cable. If it sticks the transmission won't shift. I sprayed WD-40 on both the top and bottom connectors , and it worked like a charm. It's alot cheaper them spending 2000 on a new transmission you don't really need.

probl. needs serviced

SHift solenoid pressure switch

try replacing the altonator low voltage will not let it shift.also a stoped up exaust system will cause the same problem.