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Old 11-05-2018, 09:19 AM   #1
Unclebilly
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Member#: 489793
Join Date: Aug 2018
Vehicle:
2018 WRX

Default Tribeca Project

I have had my new WRX just over 2 months and bought a Tribeca to replace my wifeís aging Lexus LX450...

The Tribeca has a weird shifting issue which seems to be common. The problem came about after the serpentine belt broke so it was driven with low voltage.

Iím thinking the issue is likely the TCU needing a reflash but it could be the valve body or the torque converter. It has 112000 miles on it and no hitch so I doubt it is worn out.

From sitting a year, the brakes are rusty and there are some minor power steering leaks.

My plan is to replace the brakes and the power steering rack and then take it to get the transmission diagnosed.
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Old 11-24-2018, 11:32 PM   #2
Unclebilly
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So I followed my plan above. The tranny diagnosis came back perfect. The fluid analysis came back good and the tranny shop didn’t even reccomend changing fluid.

The dealer did the reflash and updated the software to deal with the 2-3 and 3-2 shift and it drives beautifully. My wife loves it.
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Old 11-26-2018, 03:43 PM   #3
Sub!eDr!ver
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Member#: 88924
Join Date: Jun 2005
Chapter/Region: South East
Location: Atlanta, GA, USA
Vehicle:
2014 Cadenza, Sedona
Past: Tribeca LGTx2 Justy

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Glad to hear it. My '07 was a great car, for 150,000+ miles, then my wife crashed it. I almost bought another Tribeca, but ended up in a Kia Sedona instead.
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Old 12-20-2018, 11:18 PM   #4
Unclebilly
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Join Date: Aug 2018
Vehicle:
2018 WRX

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After just short of a month, it looks like the torque converter is suspect. It worked perfectly until Tuesday when the torque converter wouldn’t unlock and the vehicle stalled and would stall everytime it was put into drive.

It decided to cooperate when I got there and I drove it home.

On the way to the dealer yesterday, it threw a P0741 code - torque converter control solenoid. The dealer confirmed today that the problem was the torque converter... I guess i’m doing a TC over Christmas...
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Old 01-19-2019, 09:35 AM   #5
Unclebilly
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Member#: 489793
Join Date: Aug 2018
Vehicle:
2018 WRX

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So I bought the 143 torque converter which is the updated one. I got a new one from Subaru off of eBay. I also was able to find a torque converter control solenoid for it (for the Nissan trans). It was $60 and I will keep it as a spare.

While I had the exhaust off, I decided to take advantage of the ‘improved’ access and do the spark plugs. The rear drivers side plug required the expertise of my 8 year old son and his small hands to do.

Unfortunately I broke the electrical connector on the drivers exhaust vvt actuator while prying the engine over to get that last coil back in... a new one is on its way and then I can button this thing up, hopefully for good. It has spent more time on my hoist since we’ve owned it than it had on the ground... mostly waiting for parts.
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Old 01-22-2019, 04:48 PM   #6
singincanary
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Member#: 77921
Join Date: Dec 2004
Chapter/Region: Tri-State
Location: Orange County, New York
Vehicle:
'09 Ruby Red spec.B
'14 Tribeca, '08 OBXT

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What year Tribeca is it? We had an '07 that we traded in with 240k miles and picked up a '13 with 8k miles (that now has 70k miles). Best car we've ever owned. Low maintenance, acceptable performance and comfort. We have been very happy with ours.
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Old 01-23-2019, 12:12 AM   #7
Unclebilly
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2018 WRX

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I think this thing is trying to kill me...

I got the new torque converter all in and everything buttoned up. I took it for a 40 mile test drive and after 30 miles, it threw the same P0741 code as before.

I specifically took it to the dealer to have them determine Torque converter or Valve body... looks like it may need a valve body. Sure glad I went to the trouble to replace the torque converter for no reason.

That being said, after clearing the code, I drove another 80 miles before it threw the code again and hasnít thrown it again since...

Itís maddening!
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Old 01-23-2019, 12:13 AM   #8
Unclebilly
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Member#: 489793
Join Date: Aug 2018
Vehicle:
2018 WRX

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It’s an 08 with 114k miles.
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Old 02-09-2019, 08:50 AM   #9
Unclebilly
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Member#: 489793
Join Date: Aug 2018
Vehicle:
2018 WRX

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I got the new valve body and installed it yesterday.

It runs beautifully in the 50 or som miles Iíve put on it. It was pretty cold (-20C) so Iím not sure if it got hot enough in the 50 miles for a problem to crop up on not.

Iím hoping this is the last major repair I have to do on this thing.

I did manage to find a used complete (less torque converter) trans at a wrecker which I bought for $130. I plan to keep this in my back pocket just in case.
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Old 03-23-2019, 03:29 PM   #10
9three
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hi !!!! so was it the valve body
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