Post by ES_97Sport on Oct 22, 2015 18:48:52 GMT -5
My 2002 Montero does have the 4 speed AT.
Current mileage: 168,000
Ok. That's good to hear. I trust my techs, but I HAVE found a few things they thought they knew that they didn't. None of them have been mechanical, though, so I can't blame them for the few other things. Techs aren't usually electrical engineers and computer programmers.
Most posts say it's pretty much a "bulletproof" transmission.
Weeelllll, I guess that depends on your definition of 'bulletproof'. The '99+ transmission you have is allegedly not as strong as the '97/98 AW4. I seem to recall that it is also is more prone to heat damage. Its not recommended for off-road use with big tires.
But, for normal use ... I haven't heard of anyone having one go out if it was taken care of. The techs change one out once in a while but its pretty rare.
In my first post I didn't declare that the vehicle did have torque converter "shudder", at between 1,600-2,000 R.P.M. in Drive and 3rd
gear.
I read posts and decided that, first, a full fluid exchange was in order.
Could it possibly be a worn out solenoid or valve?
Obviously replacing the torque converter would be the last resort.
So with regard to the correct ATF, knowing that it's a four speed, which fluid should be used, SP II or SP III?
Also, when I return to the dealer, I will request Mitsubishi fluid only.
gear.
I read posts and decided that, first, a full fluid exchange was in order.
Could it possibly be a worn out solenoid or valve?
Obviously replacing the torque converter would be the last resort.
So with regard to the correct ATF, knowing that it's a four speed, which fluid should be used, SP II or SP III?
Also, when I return to the dealer, I will request Mitsubishi fluid only.
The 'shuddering' problem with the torque converter on the '03 shows up all the time pretty much. Worse when its hot outside and better when its cold. Eventually the clutches start slipping and millage goes to hell. But, it doesn't do it between an RPM range. The only time it NEVER happens is when the TC is locked, in fact. Which means cruising down a perfectly flat highway at 60.
Now, as I understand the Gen 2 4-speed, the TC has clutches, too, but I've never heard of the shuddering problem above occurring with that TC. I've been pouring over the '97/98 AW4 stuff and no one with that A/T - no matter what its in - seems to ever mention anything like that either. That seems kind of unique to the '03. What I have heard of is issues with the solenoid(s) and the TCU and the input and output speed sensors.
I have NO knowledge of troubleshooting the new A/Ts. I only know about the '03 issues because the Chrysler nit-wits down the street put the wrong fluid in before I bought it and I didn't realize it until a few weeks latter when the damage was done. Since only my Mitsu techs touch my '03, if that hadn't happened I probably never would have even known it was a different transmission.
The techs use the MUT to analyze all the transmission electronics and they can usually pinpoint what's going on pretty quickly. Using a MUT is a hell of a lot easier than trying to do it the old fashioned way.
Doing a transmission flush and putting in new fluid would be the first thing I'd do. I can tell you that's exactly the first thing a Mitsu tech is going to tell you to do. But, I'd strongly suggest having the dealership do that. If the problem persists, they will go from there.
I don't know on the ATF type. I have two M/Ts - which are what I drive - and the '03. I just got my '99 Limited 3.5L A/T three months ago and it's been at the dealership for the last month and a half. So, up until the last few months, I haven't had an A/T with a 'normal' transmission.
Edward