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phruntal Profile
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Date Registered: 07-2022
TOTAL POSTS: 25
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X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Hey People,

I'm new to the forum and not very mechanically minded however I've got a bit of a problem and my local machine isn't sure of the cause either.

I have a 2001 T30 X-trail 4x4 with a 2.0 litre engine and I have a rather strange problem that's just started.

It first manifested itself about 12 months ago towing my Caravan, we were in a hilly area and all the sudden it seemed to drop down into 1st gear on the auto going up the hill, this isn't out of the ordinary as we were going quite slow and it was a steep incline, the weird thing is it never wanted to come out of that first gear so we had trouble doing over 40km/h and the RPM's would go sky high and it wouldn't change gear.

We parked up for 10 minutes and tried driving again and all was well, we continued on and parked up the Caravan, the next day we drove the 4 hours home and it was fine the entire trip, although no more really big hills to deal with.

Now it's ski season and we've been driving up mountains to go skiing, one mountain is about 1500m to the base car park and it's been fine on that one, the one that is 2000m drive up we are getting the same problem right near the where we get to the top car park to park the car it's dropping back into this 1st type gear and revving like mad if we try accelerate, similar to if I was to shift the auto into 1st manually and again it won't change out of 1st in Auto. If we turn the car off, wait a couple of minutes and start it again its working fine although if we continue to try driving up the mountain it will do it again very quickly, if we turn the car off, turn it back on and drive down the hill instead it is fine and will be fine for the rest of the day driving around normally, it's just when under a heavy workload like towing the caravan or driving up a mountain for 30 or so minutes that it causes the problem.

I've had the cam and crank sensors replaced as I know they're common faults with the X-trails, also had the o2 sensor replaced, the transmission fluid replaced and obviously all servicing done and nothing seems to fix this issue. If I just use it as a normal car and never go up to the ski fields or never tow the caravan on big steep long hill runs then it's always fine and works flawlessly. The mechanic tested the radiator fluid and said it seemed to be a normal temperature after a long drive.

Prior to this we drove up these same mountains for 10 years without an issue, so it's a new problem in the past 12 months.

Any help appreciated, sorry for the long winded post, just wanted to give a good understanding of the problem and my local machanic has no idea what to do.

Thanks in advance.
2/Jul/2022, 6:17 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


It may be a blocked filter in the transmission or a sticking shift valve.
If the fluid has been replaced make sure it is of the correct type.
Maybe flush the transmission fluid by having it replaced again.

It sounds like the shift solenoids work fine when there is not much pressure but when under heavy load or at high revs in 1st gear the solenoid is not operating correctly.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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2/Jul/2022, 7:20 pm Link to this post Send Email PM   Send Private Message Blog
 
phruntal Profile
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Thank you Kev, I'll pass this onto my local mechanic as he didn't know what to do, the X-trail works perfect until this situation, one mountain it drives up fine, the other is just a bit steeper and a longer drive at 2500 meters high the drive takes about 20 minutes and it's a steep climb, it gets right near the top then drops back to first and gets stuck there. Just last year it did about 80 trips up this mountain with no problem and now this year this is happening.

I had the transmission fluid replaced with the correct fluid by a mechanic about 3 weeks ago hoping it would fix the problem after it happened that same day. Then I went today with the new fluid and it happened again right near the top car park of the mountain.

I really appreciate your information as I'm not very mechanically minded and my mechanic seemed to be lost as to what to do.
2/Jul/2022, 7:24 pm Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Another question if you don't mind, are these things like the sticking shift value worth repairing on a car of this age? Does doing this involve removing and opening up the gearbox which would incur a big labour charge I'm guessing. Is the gearbox filter a big job too?

I'm really not sure if the repairs are worth undertaking on a 2001 car, I do love the car though and its been fantastic and so reliable, this is my first problem in 15 years with it outside of normal servicing and wear and tear type problems that are normal things to do.

I'm scheduled to drop it off to the mechanic on Monday so just trying to work out if I should do it or think about another car instead.

To me it seems like the car is overheating in some way when it does this thing when it drops back to fist and stays there as If I turn the car off, wait a few minutes and start again it works fine however if in that case I go straight to driving up the mountain again it quickly gets stuck in 1st again, if I just give up and turn around and drive down the mountain it is fine. If I sit there and wait 30 minutes then continue to finish the drive up the mountain it gets up the mountain without doing it as its had time to cool down?

Thanks again for your advice.
3/Jul/2022, 4:04 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


I think they can do the filter and valve solenoids with the transmission in the Xtrail, just raised up and remove the oil pan underneath, but your mechanic should be able to tell you.

If you can replicate the problem somehow and take it to him to use a diagnostic tool on it they might be able to see exactly what the problem is.

Does it do the same thing if you drive around with the shift lever in 1st for a while and then try to shift into 2nd but it stays in 1st ?

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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3/Jul/2022, 8:29 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Yes I can easily replicate the problem, it does it every time I drive up this particular mountain at virtually the same distance up the mountain every time like clock work, and this has only just started, last winter I did the same drive 80+ times with no issues.

When the problem happens If I pull over and move out of Auto and into 1 and drive along in 1st for a while and try change into 2 manually it will still not change out of 1.

The only way I can get it to change out of 1 is to turn the car off, wait a few minutes and turn it on and then gears will work again as long as I don't continue to try drive up the mountain and turn around and go back down, if I continue to drive up it will quickly drop back to 1 and get stuck there again unless I sit and wait 10 to 20 or so minutes for the car to cool down then it will continue to drive up the mountain fine.

3/Jul/2022, 8:36 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


I've just been to the mechanics, his gadget didn't pick up any transmission error codes.

He's ordering in a filter for the transmission and going to try that along with putting some better oil in it.

4/Jul/2022, 7:54 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Before he replaces the filter I would suggest you drive for a week, then have him replace the oil again, then drive for another week before he replaces the filter and some more new oil.
This should flush out as much as the old oil as you can before possibly having the new filter affected by dirty oil.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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4/Jul/2022, 10:00 pm Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Thanks Kev, I will do this.

Last edited by phruntal, 5/Jul/2022, 3:51 am
5/Jul/2022, 3:50 am Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 07-2022
TOTAL POSTS: 25
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Re: X-trail T30 2.0 2001 tranmission gear change problem when under heavy load


Well, thanks Kev for your help, problem is resolved.

In another thread I posted about my cars starting problem being resolved by a MAF sensor replacement, it had trouble starting if it was turned off at a petrol station and then started again straight away, it only liked cold starts, any start not long after being turned off caused it to stall not long after starting, I had to pump the accelerator to keep it running.

Well, the MAF sensor also fixed this gearbox problem, today I drove up the same mountain with no problems at all, it takes about 35 minutes to drive up and about 20 minutes to drive down, so I drove up and down 3 times in a row fine. Prior to the MAF replacement the previous 4 attempts on different days it would not get past 3/4 of the way up without dropping back to first and getting stuck.

Very happy, quick cheap easy fix in the end.

My mechanic hasn't had time to change my gearbox oil or replace the filter, he's got the filter sitting there at his workshop to do it he just hasn't had a chance, very busy, rural mechanic so the only one around for an hour or so drive.

Thanks for all the suggestions, it's appreciated.

Last edited by phruntal, 16/Aug/2022, 7:16 pm
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