Transmission Lockup - where to next?

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Transmission Lockup - where to next? #1068179 01/17/14 10:02 PM

Joined: Oct 2013

Posts: 32

Colorado

vectorsc

Getting the Wheeling Fever

I am getting a lockup failure code from my TCU, and then lockup is disabled after that. I have done the following:

1. Replaced Transmission with a super low mileage unit from a wreck.
2. Replaced Torque converter with a new one at that time.
3. Replaced solenoids for valve body.

I'm wondering if this isn't some sort of issue with fluid flow through my cooling system or perhaps its my TCU?

What would you folks check next?

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1999 Montero Gen 2.5

Re: Transmission Lockup - where to next? [Re: vectorsc] #1068180 01/17/14 10:54 PM

Joined: Jun 2002

Posts: 6,211

Apache Junction, AZ

JohnnyBfromPeoria Offline

Trail Leader

Temp sender on engine.

John B.

'87 Raider 2.6 Turbo Auto, Under Construction
'95 Montero SR, 35x12.5/15 BFG M/T KM-2's, Rock sliders, Qtr panel chop, gas tank lift, 2" BL, Aisins, 5.29s
'95 Pajero Mini
'98 Montero Winter Ed.
'04 Cadillac XLR
'03 Kawasaki ZRX1200R
'60 Ford Falcon 4Dr

Re: Transmission Lockup - where to next? [Re: JohnnyBfromPeoria] #1068181 01/17/14 11:48 PM

Joined: Oct 2013

Posts: 32

Colorado

vectorsc

Getting the Wheeling Fever

I don't believe that's possible as the issue - the temp sender tells the TCU that operating temperature has not been reached. When that happens, the TCU won't command the lockup solenoid.

However, it won't be represented as an error code as the lockup won't even be asked for.

I think that my trip into the drink may have affected the TCU - I suspect it didnt like being watered.

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1999 Montero Gen 2.5

Re: Transmission Lockup - where to next? [Re: vectorsc] #1068182 01/18/14 12:11 AM

Joined: Jan 2001

Posts: 13,649

Helen , GA

fasteddy

Web Wheeler

please list your vehicle in you profile so I won't have to guess...

Not responsible for advice not taken...

Re: Transmission Lockup - where to next? [Re: fasteddy] #1068183 01/18/14 03:10 AM

Joined: Oct 2013

Posts: 32

Colorado

vectorsc

Getting the Wheeling Fever

Done . it was a gen II.

Looked at the computer- totally dry inside, no water signs, it was waterproofed on the PCB and such.

The lockup solenoid read 15ohms from the harness on the computer. Each time I reset the computer lockup works again for quite some time.

The last transmission and torque converter did this exact thing as well. Anyone have experience with the NSS potentially causing this? Its the only common electrical bit other than the TCU.

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1999 Montero Gen 2.5

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