How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask sprinkles08 Your Own Question

sprinkles08
sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 16841
Experience:  ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
9825021
Type Your Car Question Here...
sprinkles08 is online now
A new question is answered every 9 seconds

Isuzu Trooper LS: 2000 isuzu trooper AT wont shift out of first

Customer Question

2000 isuzu trooper AT wont shift out of first gear. Had an accumulator leak, which is now repaired. May have been run low on ATF too many times. Pulled pan, replaced filter, and refilled with ATF. Still wont shift out of first. Wont start in winter mode. No MILs.
Submitted: 1 year ago.
Category: Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

 

Even though the engine light hasn't come on I would still recommend seeing if there are any fault codes stored. It's possible that an electrical issue could be preventing the 1-2 shift and there would most often be a fault code stored. It may be a solenoid or solenoid wiring issue. You may opt to replace the solenoid and see what happens (solenoid A on the valve body).

 

If it's not a solenoid/wiring/controller issue then it's going to be an internal trans issue. It could be a failed clutch or it could be a geartrain component. If a clutch fails it will usually slip first before totally failing and would often cause the fluid to burn, geartrain failures are usually sudden.

sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 16841
Experience: ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
sprinkles08 and 19 other Car Specialists are ready to help you
Customer: replied 1 year ago.

Hi


 


Thank you for your reply.


 


I found another string below, that speaks specifically about solenoid A (1-2/3-4 shift) and B (2-3 shift). The transmission won't shift from 1-2, suggesting that A is not functioning. Furthermore, it wont start in winter mode (3rd) gear, suggesting that solenoid B doesn't work. However, reverse functions (solenoid B). Does this point to something besides the shift solenoids?


 


Also, I rechecked for codes using my code reader. There were none. Are there deeper codes that I cannot read with a simple OBD II reader?


 


Because the accumulator cover was leaking copious amounts of ATF for several months, I thought that some of the electrical connectors might be fouled. I cleaned a 3-4 pin connector on the bottom of the transmission. Do you know where the connector is located that is referenced below (pin 6- I assume it has at least 6 pins)?


 


I need to drop the pan to get to the solenoids on the valve body, correct?


 


Thank you for your help.


 


Below is the link and referenced string.


 


http://forum.planetisuzoo.com/viewtopic.php?f=4&t=67229


 


Gear selection is accomplished by switching two shift solenoids On or Off as necessary to select the correct gear. The two solenoids are controlled by the PCM using wires that go through the harness that apparently got melted. Since Winter Mode (3rd gear) can be selected, the 1-2/3-4 (Shift A) solenoid is working. The 2-3 (Shift B) solenoid is apparently not working due to a defective solenoid or a wiring problem in the harness or a problem in the PCM.



The solenoid is energized when the PCM provides a ground on the control side the selected solenoid. The +12 VDC power side of the two solenoids are connected together inside the transmission, so if Shift A has power so does Shift B. Shift B is energized in P,N,R and 1st and 2nd gear. The Shift B control is on Pin A (6) of the 7 Pin connector. If Shift B is not selected, such as in Winter Mode, the voltage level on Pin A (6) will be +12 VDC, When Shift B is energized Pin A (6) will be 0 VDC.

If the voltage on Pin A (6) remains +12 VDC when it should be 0 VDC the problem is in the PCM or the wiring to the PCM.
If the voltage on Pin A (6) remains 0 VDC when it should be +12 VDC the problem is a defective solenoid (open coil).
The engine needs to be running when making voltage checks.
It is also remotely possible the the Shift B solenoid is working properly but another defect is causing the problem.

Expert:  sprinkles08 replied 1 year ago.
If you've checked with a code reader and found no codes then that should be enough.

Solenoid B is a normally open solenoid which means it flows fluid through it when turned off, it blocks fluid when turned on. For third gear solenoid B is turned off to allow flow, so if the solenoid wasn't working you would still have third gear as long as A and the rest of the trans are working correctly. Solenoid A is turned on for third, so if solenoid A isn't working then it's not going to allow third gear. Since you do have first gear and first requires solenoid B I believe we can rule it out.

The connector we're concerned with is a 7 way connector, connector M7 on the left side of the trans. The other large connector is from the range sensor/neutral safety switch, which is mounted to the left side of the case.




Yes, you do need to drop the pan to access the solenoids on the valve body.
Customer: replied 1 year ago.

Thank you very much. Excellent advise!

Expert:  sprinkles08 replied 1 year ago.
You're welcome and good luck!


Customer: replied 1 year ago.

Hi,


 


I replaced solenoid A, replenished the fluid, and tested the operation of the transmission with my car on jacks. Reverse works as before. The rear wheels spin in 1st through 4th, but the transmission is locked in first gear - no shift from 1st to 2nd, 2nd to 3rd, or 3rd to 4th. Interestingly, the rear wheels spin in winter mode, which it did not do before; however, it appears to start in 1st gear in the winter mode and not 3rd as designed. The questions I have are as follows:


 



  • Will the transmission shift through the gears while the car is still on jacks and without a load on the wheels, or do I need to road test the car to test the operation of the transmission through the gears?

  • If there still is no shift with the solenoids operating properly, can I assume that there is a deeper transmission problem, i.e., one that requires a transmission overhaul?

  • This is just speculation, but what do you think the failed component(s) is (are)?


 


If the transmission needs to be rebuilt, I am thinking about doing it myself. I have a reasonable mechanical aptitude, but I have never tackled an automatic transmission. Would you recommend it?


 


Thank you,


 


Paul

Expert:  sprinkles08 replied 1 year ago.
It should shift on the jack stands but you might give it a quick spin on the road to see if it shifts. MOst likely it won't.

Is it still not setting any codes?

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician