Jackaroo manual box & trasnsf. case oil

Submitted: Saturday, Jun 18, 2005 at 20:12
ThreadID: 23971 Views:4531 Replies:5 FollowUps:1
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Hi all the Jackaroo owners out there, i have just changed my transfer case and manual box oil.
When I did it about 50,000 ks ago I used engine oil, ( the manual states either engine oil or 75W/85 gear oil ) being a tight bugger I of course used engine oil.
This time prepairing for my Birdsville trip in July I used a Castrol synthetic gear oil, ( bloody expensive ). Since changing over I have noticed a much smoother gear change ( even the dear wife has noticed it ). I will be interested if the 5th gear whine improves.
99 TD Diesel 4JX1
Has any body else come across anything that has improved the general performance of these trucks ? Just by doing something as simple as using a different oil etc.
Will
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Reply By: Willb - Saturday, Jun 18, 2005 at 20:15

Saturday, Jun 18, 2005 at 20:15
Another thing I am changing the rear diff oil as well. Do I need to use the Holden LSD additive. Am using Penrite LSD oil.
Will
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AnswerID: 116280

Reply By: Haza - Saturday, Jun 18, 2005 at 20:20

Saturday, Jun 18, 2005 at 20:20
In my rodeo I had my gear box oil change about a year ago by a service shop, now it feels a lot rougher then before (change), I assume that i must of had gear oil in there and this time they just replaced it with engine oil. maybe that it explains it. Maybe I'll do it myself this time and use the money saved on a good oil, cause all oils ain't oils.
AnswerID: 116281

Reply By: Andrew from TrekTable - Saturday, Jun 18, 2005 at 20:37

Saturday, Jun 18, 2005 at 20:37
Willb,

I do believe you do need the additive, even if using LSD oil. I think penrite make an equivalent additive which is much cheaper than GMH. There was a post on this topic quite awhile ago (~6mths or more).

I've only ever used Gear oil in my gearbox because I wasn't game to change from 85W to 15W40. Seem like a huge difference to me so I only ever used 85W gear oil but I too have a 5th gear whine. Mind you I've got 160,000km and quite abit of that included towing a 23ft fibreglass fishing boat for 800km at a time, mostly in 5th gear so I can't complain. I might try synthetic gear oil next time. Let me know if it alters your 5th gear whine.

Andrew
AnswerID: 116283

Follow Up By: Willb - Saturday, Jun 18, 2005 at 21:04

Saturday, Jun 18, 2005 at 21:04
Thanks for your reply Andrew, I have just had a look at the Penrite web site and they do list a LSD additive, I will check my local supplier if they can get it.
Will
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Reply By: Member - Banjo (SA) - Saturday, Jun 18, 2005 at 22:57

Saturday, Jun 18, 2005 at 22:57
Do all of my own servicing re oils on my TD 99 SE Jack - using Castrol fully synthetic - Syntrans 75W85 - in the G box and T case - $250 for a 20 L drum. Drain intervals for the trucks it is aimed at are recommended as 180,000 - I do mine at 50's - have been using it since 10,000k - it reduced the 5th gear whine and that has been stable ever since - touch wood, the Jack runs very well still with 103k on the clock now. I use Castrol magnatec in the donk and change it and the main F at 7500k (has been every 5k until recently - The minor oil filter is now going to be every 20k.The diff oil has been 85W140 LSX Castrol - they advised that the additive was not necesysary. The are very helpful re client feedback but not sure how much they "really" know about lubrication !
AnswerID: 116304

Reply By: Turbos - Monday, Jul 04, 2005 at 17:17

Monday, Jul 04, 2005 at 17:17
Banjo, I used the same transfer/gearbox and diff oils as you. I was also using 10w40 magnatec which was pretty good. I then changed to 5w30 castrol syntheticR and found that the jackaroo ran slightly better on cold starts, particuarly in winter. Thats just my opinion, but if you are having no problems on cold starts then why change!!! Cheers
AnswerID: 118793

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