1989 Nissan Patrol TB42 Auto Problem with lockup

Submitted: Saturday, Jun 03, 2006 at 22:03
ThreadID: 34583 Views:6699 Replies:3 FollowUps:1
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I have a 1989 Nissan Patrol Auto TB42 Petrol/gas when you get to about 85kmph it will drop into lockup, but if you are going up a slight incline the rev counter flicks and you can feel the surging it wants to come out of lockup but won't. If speed drops to 80kmph it will come out of lockup using speed sensor no problem. If you floor it to kick it back no problem. If I use power switch I have had cases where it will surge in 3rd, but I think that was heat related as it was a very hot day and I was towing a trailer, but not as bad as when in lockup. If you keep forcing it in lockup it will drop back to overdrive and will not go into lockup again until you stop and turn off ignition and restart engine then lockup will work again. I have rang a lot of people about this problem and I have had a lot of different answers. I'm just hoping that someone else has had same problem and can steer me in right direction. It has 239k on truck and the guy I bought it off said the Transmission was done up at 200k. I've had it since 227k and it has been doing it all the time. The guy I bought it off was in Sydney and his wife just used it as a shopping trolley to shops, no long trips so they probably didn't notice it. I live in the Country and all my running is at 100k so it bugs me all the time. I have been told it is a temp sensor, but it is expensive just to try that and if it doesn't fix it I'm out of pocket and still got the problem.

Thanks in advance

Straps
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Reply By: mechpete - Monday, Jun 05, 2006 at 00:17

Monday, Jun 05, 2006 at 00:17
Gooday straps,
I,m curently driving my second GQ auto ,the first was duel fuel and this one is petrol only. The auto is set up for light throttle driving on flat road , as you said when you reach an incline the auto will hunt from economy to power range , very annoining , from what I,m told the trans is a skyline box and its life is about 200k.
the surg you talk about sounds more like a running problem with the engine ,
because when I had a surge it was in lockup and you could just see the tacho flicker about 100 revs which is the difference when the converter locksup ,the problem is the torque convertor clutch solenoids . The EFI model ,after 92 the box went electronic ,it still has the same caracteristics but the EFI engine has a slightly
better torque and its not as sensitive. The off road ability of the auto is unreal in the wet and the sandy conitions ,just returned from the CSR and it was sensational.
if ya want more info send me an email .
cheers mechpete.
AnswerID: 176738

Follow Up By: straps - Tuesday, Jun 06, 2006 at 09:40

Tuesday, Jun 06, 2006 at 09:40
Hi mechpete,
The gearbox in my '89 GQ I've been told is run by a electronics controlled by about half a dozen sensors. Mine will not come out of lockup till speed drops below 80kmph which is controlled by speed sensor. The flicking of tacko is caused by box wanting to come out of lockup, but cannot or won't because of a problem. If I select power it drops back to 3rd no problems. I can guarantee that the engine doesn't have a running problem. I have taken an Automatic specialist for an extented run in it and he said it could either be Torque Converter or temp sender. He could be on the right track with Temp sender as it gets worse the hotter the day. But yes the solanoids could be a problem also. I have been quoted about $3.500.00 for a full rebuild but it was rebuilt about 40k ago so I'm not going down the full rebuild path. It would be cheaper to convert it to manual. I've been quoted $1,000.00 just for Torque Converter changeover and no one will guarantee that it will fix problem. I have found that not to many people know much about these transmissions, especially Nissan dealerships. Heaven help the people who own these latest Autos no matter what brand, when they are out of warranty and something goes wrong you will need very deep pockets. I see there is a mob in Melbourne who have a beefed up Turbo 700 with no electronics conversion for Patrol might look into it. Give me a straight Hydraulic Auto box anyday less to go wrong all these sensors add up to a pain in the butt as they get older.

Regards

Straps
0
FollowupID: 432994

Reply By: awill4x4 - Tuesday, Jun 06, 2006 at 22:00

Tuesday, Jun 06, 2006 at 22:00
Straps check out these websites with regards to Nissan Jatco transmissions.
Wholesale Automatics
Keas Automatics
What these guys don't know about Nissan auto's isn't worth knowing.
Regards Andrew.

AnswerID: 177113

Reply By: mechpete - Tuesday, Jun 06, 2006 at 23:20

Tuesday, Jun 06, 2006 at 23:20
Hi straps ,
get in concact with GV Automatics in Shepparton 0358216398 Steve Dempster
he fixed the same problem with my 89 GQ The other bloke to contact is
Cohuna Automatic Transmissions his name is BobTrayner he is very good find the Ph Noin the Echuca area book
cheers Peter
AnswerID: 177132

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