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Isuzu Trooper Transmission Problems

159 messages,  Last post on Apr 24, 2013 at 5:38 PM

You are in the Isuzu Trooper Forum.

What is this discussion about? Isuzu Trooper, Isuzu Trooper II, Transmission, SUV

Messages Page 1 of 16

#1 of 159 trooper 89 transmission problems !!! by edgarin

Jun 26, 2007 (6:25 pm)

i have a 89 trooper 4x4 automatic transmission 4doors 4cyl, and it does not shift correctly because it shifts at 4500revs on normal drive (not full throtle), from 1st to 2nd runs like 30-35 mph. it shifts to 3rd, but for that i need to go hell fast!!! what could it be ??? does anyone has the same problem ????? i tried to adjust the throtle cable that goes into the trans but was useless.... a sensor maybe ?????? please help me!!

#2 of 159 Isuzu trooper II by nobhil

Jun 30, 2007 (7:43 pm)

I have an 89 trooper II I am also having transmission problems. It shifts into 2nd at about 25-30 mph. then into 3rd at about 40-50 mph. When it shifts down at 40mph or at 25mph the rpm goes way high. I have changed the fluid and filter any other ideas?
                            Thanks
                          nobhil

#3 of 159 Re: Isuzu trooper II [nobhil] by edgarin

Jul 01, 2007 (2:24 pm)

Replying to: nobhil (Jun 30, 2007 7:43 pm)
it seams that we have the same problem, someone said to me it was a sensor iside the gearbox, but another person said that it coul be a sensor wich is on the throttle body, i think i check on that frist, other than getting the transsmision out. now i hate sensors, why dont they do cars like old "just mechanic" could be cheaper :p. If i find the problem ill post it here.

#4 of 159 89 Isuzu trooper by nobhil

Jul 01, 2007 (9:22 pm)

I was told it could be the throttle valve cable or transmission solenoid, there are three on mine. My throttle cable is bad so I am replacing it. I was also told, that cable is crucial to the shifting of the transmission.
 
                                Thanks,
 
                                 nobhil

#6 of 159 Re: trooper 89 transmission problems !!! [edgarin] by justin236

Oct 17, 2007 (9:26 pm)

Replying to: edgarin (Jun 26, 2007 6:25 pm)
I think I might have the same model except my car is a manual transmission. I've actually found that you do swap from 2nd gear to 3rd at about 40 rpms and around 30-35mph. Don't ask me why, but i find if i want any power out of the car at all thats the optimal shifting point.
 
Don't know if thats how its suppose to be, but the issues seem to correlate.

#8 of 159 Transmission is slipping... by socalpam

Aug 31, 2007 (1:54 am)

I have a '99 Trooper that only has problems during extreme heat and/or humidity. Infrequently the transmission will slip into neutral soon after starting the car, requiring me to pull over, turn off the engine and re-start. More frequently the car will "clunk" as it shifts into third gear, again, right after starting the car. This also requires me to pull over, stop, count to at least 20 and re-start.
 
I've had the car checked out by reputable repair folks who were unable to find anything out without taking out the transmission and pulling it apart at great expense (all of them recommended against doing that). One guy recommended that I leave it alone unless it starts to act up more regularly. He was sympathetic, but since the car doesn't act up on command he felt there was little he could do since he wasn't experiencing the problem.
 
I drive my kids around and having a car slip into another gear while in motion is disconcerting to say the least. Has anyone else come upon this problem? I've checked for recalls, service bulletins, etc. and am drawing a blank.
 
I bought the car used several years ago (returned lease) and it now has 83,000 miles on it. I've maintained it pretty well all this time (may have gone a little long on some oil changes) and recently had the transmission and engine flushed/new liquids/etc. I hoped it would help, but no luck.

#9 of 159 Re: Transmission is slipping... [socalpam] by dnewell

Oct 18, 2007 (8:44 am)

Replying to: socalpam (Aug 31, 2007 1:54 am)
I am having the same problem. It started about 6 months ago. After leaving the car parked for a few days. It slammed into 3rd each time until I reached the interstate and stayed at a consistent speed. It did it again the middle of August after being parked for 2 weeks. But this last Sunday, it was only left overnight. I started it up, backed up and the first time shifting into 3rd, it slammed hard, it also slammed back when downshifting. That is the first time it has reacted in downshifting. she has 127,000 miles on her, I have kept all maintenance including a transmission service 3 weeks ago. I took it back to the mechanic, He is at a loss. His only suggestion is to change the transmission filter which was not done in the flush and fill service. At a cost of aroune $200.00. Or just leave it alone. Im worried about it, I love this truck. If you get any help, please let me know. thanks, Deborah

#10 of 159 Re: Transmission is slipping... [dnewell] by wlbrown9

Oct 18, 2007 (11:35 am)

Replying to: dnewell (Oct 18, 2007 8:44 am)
Check out the transmission mode switch. pictures
 
http://isuzufaq.ibctech.ca/range.pdf
 
Watch the shift indicator on the dash. If the lights behave strangely, for example indicating R when you have the shifter in 3, the mode switch could be the problem. Try cycling the shifter several times to try and clean the contacts.
 
Read more on this topic in a previous discussion here:
 
http://forum.planetisuzoo.com/viewtopic.php?t=1707

Messages Page 1 of 16

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