Auto slip in all gears over 1600 rpm - Patrol 4x4 - Nissan Patrol Forum
Patrol 4x4 - Nissan Patrol Forum, Photos, Directory

 


Go Back   Patrol 4x4 - Nissan Patrol Forum > Nissan Patrol and Safari Models > Nissan Patrol GQ/Y60 & Ford Maverick

Patrol4x4.com is the premier Nissan Patrol Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-01-2017, 05:52 PM
Senior Member
 
Join Date: Aug 2006
Location: Brixham, UK
Posts: 221
Thanks: 1
Thanked 3 Times in 3 Posts
Default Auto slip in all gears over 1600 rpm

Hi All,
This auto box is on my Safari TD42T, but as far as I can see, it's the same as on TD42, TB42 and 45.

Initial accelerate with torque converter is perfect.
Torque converter lock up at 1600/1700 is perfect.
When revs are higher that 16/1700 the revs spin up like there's no clutch.....

We've changed out 6 litres of ATF, no burnt smell, still reddish, with some black sediment (car was stood for 4 years with no use..... Oil level stays as per dip stick, so level is correct and no leaks.

Peculiarly, when engine has run for 4 hours and ATF is hotter, she will get to 2000 rpm without slipping.

Car was driven for 5 hours at 130KPH with no probs. Engine off for 1 hour, then re-started. This issue was immediately present and was there for the next 15 hours driving... All driven with lock-up just about engaged, so no slipping, but as soon as you tried to increase speed, lock-up would disengage and engine would free spool.

1st job is to take pan off, check magnet, clean filter, visually inspect valve block. Replace ATF and try again with all new ATF.

I don't think this is a major failure. Could this just be blocked ATF filter in pan?

What do you think?
Thanks in advance
__________________
John
'90 TD42 Safari 12V MT CRGY60 - Cyprus import
'93 TD42T Safari 24V AT WRGY60 with beer cooler - Jap import
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 08-01-2017, 06:06 PM
JFF45's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Morayfield QLD
Posts: 2,778
Thanks: 501
Thanked 622 Times in 433 Posts
Default

John, if you mean it all slips when the torque converter lock up is off, it suggests an issue with the TC itself.
__________________
John

2001 GUII Ti 4500 - now converted to TD42T auto with Nomad valve body

Conversion thread:
http://www.patrol4x4.com/forum/membe...ersion-269561/
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #3  
Old 09-01-2017, 01:45 AM
Senior Member
 
Join Date: Aug 2006
Location: Brixham, UK
Posts: 221
Thanks: 1
Thanked 3 Times in 3 Posts
Default

Thanks for the response. Certainly I mean that when the TC lock up is off, all gears slip, but only with revs higher than 1600rpm... Below that, from tick-over to 1,600 the torque converter is working perfectly. Pulls as it should below 1600.
Is there a particular function that happens around 1600 to 1800 RPM, at half throttle or less (haven't tried higher throttle, just in case we damage something)? e.g. what happens if the filter is clogged and the oil pump can't push enough ATF to the torque converter?
Gonna read the auto service manual to see if I can spot anything, but didn't come across anything first time around...
__________________
John
'90 TD42 Safari 12V MT CRGY60 - Cyprus import
'93 TD42T Safari 24V AT WRGY60 with beer cooler - Jap import
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
 
  #4  
Old 09-01-2017, 07:00 AM
JFF45's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Morayfield QLD
Posts: 2,778
Thanks: 501
Thanked 622 Times in 433 Posts
Default

So you changed out 6 litres of ATF without dropping the pan to wash the gauze strainer and clean the pan even when you noticed black sediment in the fluid?
__________________
John

2001 GUII Ti 4500 - now converted to TD42T auto with Nomad valve body

Conversion thread:
http://www.patrol4x4.com/forum/membe...ersion-269561/
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #5  
Old 09-01-2017, 04:29 PM
Senior Member
 
Join Date: Aug 2006
Location: Brixham, UK
Posts: 221
Thanks: 1
Thanked 3 Times in 3 Posts
Default

Yes, 'fraid so.. Facilities didn't allow dropping the pan, and with no indications of any box issue when last driven, plus, now being driven for 5 hours at 130Km/Hr (in lock up), with no problem suggested no issue atall.... Only after this period and starting again did the box/torque converter show any signs of mis-behaving...
__________________
John
'90 TD42 Safari 12V MT CRGY60 - Cyprus import
'93 TD42T Safari 24V AT WRGY60 with beer cooler - Jap import
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #6  
Old 14-01-2017, 05:04 PM
Senior Member
 
Join Date: Aug 2006
Location: Brixham, UK
Posts: 221
Thanks: 1
Thanked 3 Times in 3 Posts
Default

Update - Car now located in South of France. Engineer dropped the pan, said oil and everything else was looking pretty clean, but cleaned filter, flushed everything, buttoned up, new ATF and no more free revving over 1700 rpm! Fingers crossed!!
__________________
John
'90 TD42 Safari 12V MT CRGY60 - Cyprus import
'93 TD42T Safari 24V AT WRGY60 with beer cooler - Jap import
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
The Following User Says Thank You to john.parham For This Useful Post:
JFF45 (14-01-2017)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On







Subscribe in NewsGator Online


All times are GMT +10. The time now is 08:05 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.