Synthetic G'box oils

Submitted: Tuesday, Aug 12, 2003 at 10:01
ThreadID: 6522 Views:3092 Replies:10 FollowUps:7
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Have heard some wonderful 3rd and 4th hand reports on synthetic gearbox oils. It's about time to do the 5speed gearbox on my GQ TD42 and I'm wondering if anybody has experience with synthetics and could reccommend any particular oil??

Thanks in advance!
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Reply By: Member - DOZER- Tuesday, Aug 12, 2003 at 10:41

Tuesday, Aug 12, 2003 at 10:41
Castrol VMX-m is voted the best oil for a cruiser 5 speed gearbox (as most know they suffer from bad shifting) it is either part or full synthetic-not sure as i put ATF in mine(auto).
Andrew
wheredayathinkwer mike?
AnswerID: 27559

Follow Up By: Hughesy - Tuesday, Aug 12, 2003 at 11:25

Tuesday, Aug 12, 2003 at 11:25
Dozer, my 5 speed cruiser (97 model 75 series) box is a bit of a shocker when it comes to changing (2nd and 3rd) - don't know if its the synchros or not but I tried putting Nulon gearbox additive (white creamy bleep e) and it didn't make much difference. If I give this castrol oil a try do I have to flush the box out or just drain and refill with the good stuff. I can't imagine it being to cheap. ANother bloke told me you can but auto tranny fluid in them but I reckon that would be to light and only do more dame. Thanks in advance.
Hughesy
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FollowupID: 18971

Follow Up By: Member - DOZER- Tuesday, Aug 12, 2003 at 13:04

Tuesday, Aug 12, 2003 at 13:04
Hughesy
put it straight in, drain for a while to get old all out, about $20/l at autopro, may be able to get supercheap to get it in 4 u.
ATF will work as will motor oil without friction modifiers like the motorpro stuff sold at Kmart.
ATF has EP additives, motor oil doesnt i think.
The problem with atf is its hard to keep in there as its sooooo thin.
Andrewwheredayathinkwer mike?
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FollowupID: 18985

Follow Up By: Martyn (WA) - Tuesday, Aug 12, 2003 at 20:32

Tuesday, Aug 12, 2003 at 20:32
Dozer,
Your spot on, no EP additives, plus the Autran and the like has anti foaming agents which prevents air getting entrained in the oil reducing the cooling and lubrication qualities.Keep the shiny side up
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FollowupID: 19033

Reply By: Stevo - Tuesday, Aug 12, 2003 at 11:05

Tuesday, Aug 12, 2003 at 11:05
I use Lubrimaxx Transgear (fully synthetic) in gearbox of GU TD42.
AnswerID: 27563

Follow Up By: David N. - Tuesday, Aug 12, 2003 at 12:02

Tuesday, Aug 12, 2003 at 12:02
Thanks Steve
Q1 what brand is Lubrimax.. is that Castrol??
Q2 Are you happy with the results... Better than mineral oil??
Q3 Cost??
Again, thanks in advance.
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FollowupID: 18972

Follow Up By: Stevo - Tuesday, Aug 12, 2003 at 12:30

Tuesday, Aug 12, 2003 at 12:30
David, Lubrimaxx is an Ozi company
http://www.lubrimaxx.com/
I find it far superior to mineral oil, much smoother gear changes and no more cold gear baulking in winter.
It costs around $50 for 5ltr
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FollowupID: 18975

Follow Up By: Tony - Tuesday, Aug 12, 2003 at 12:47

Tuesday, Aug 12, 2003 at 12:47
Stevo what grade of Transgear do you use?
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Follow Up By: Stevo - Tuesday, Aug 12, 2003 at 12:56

Tuesday, Aug 12, 2003 at 12:56
Tony, I use 75W 80
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Reply By: Mixo - Tuesday, Aug 12, 2003 at 12:16

Tuesday, Aug 12, 2003 at 12:16
I have Castrol Syntrans in my Jack Gbox and transfer case. Is a bit over $10 per litre (in a 20L drum).
Fully synthetic. Changed mine from conventional oils at about 40k - had a whine in 5th (most Jacks post 99 do). Mine whine has virtually gone now - very quiet indeed. Synth may have helped or it just ran in.
Considering the intervals involved, will probably stick with it.Gotta have red sand on those boots !
AnswerID: 27575

Reply By: Allyn (Pilbara) - Tuesday, Aug 12, 2003 at 13:37

Tuesday, Aug 12, 2003 at 13:37
http://www.redlineoil.com.au/
Next Trek - Callawa Rd
AnswerID: 27587

Reply By: joshinthecity - Tuesday, Aug 12, 2003 at 13:44

Tuesday, Aug 12, 2003 at 13:44
Yep yep yep, my vote is for Redline too.
Kept the gearbox on my 200sx together even though I was drag racing it regularly, and was putting out over 200kw at the wheels. Far beyond it's design brief.
In turbo racing circles Redline is considered the best, however I'm not sure how that translates to 4WD.
My 2c

Josh.

AnswerID: 27588

Reply By: Jason (macca) - Tuesday, Aug 12, 2003 at 13:48

Tuesday, Aug 12, 2003 at 13:48
David,

I cant speak for 4wd experience as I dont run it in my 4wd but I can tell you
that I run Synthetic (castrol) in my wifes Commodore and have had no
drama's. She has done 170k and has not had any problems with the transmission. The box in her commodore are known for trouble around 120k. So I can only assume that the synthetic is doing a good job.

Cheers
AnswerID: 27589

Reply By: diamond (bendigo) - Tuesday, Aug 12, 2003 at 18:08

Tuesday, Aug 12, 2003 at 18:08
gday david.
i use valoline semi synthetic blend.
it soon shut up 5th gear in the patrol and early morning shifts heaps easier.got over no fraser.
get on with life(more weekend fun)
AnswerID: 27598

Reply By: Martyn (WA) - Tuesday, Aug 12, 2003 at 20:26

Tuesday, Aug 12, 2003 at 20:26
David N.
I use Royal Purple in the transfer case, gearbox and diffs, for me it made a difference, I made the purchase based on life cycle costs and not the initial cost which is high, no hiding that. I've put Royal Purple in my Rangie 5 speed and it's made a lot of difference, the choice was to buy some 300 watt speakers or 7 litres of Royal Purple, the Royal Purple won, since I've had it in 2nd gear has decided to rejoin the rest of the gearbox and now works, it was extremly hard to get when cold, Ok when hot.
The only problem I would say I have is when working the box on my GQ really hard I get a hypoidy type of smell inside the cab, this has something to do with my placement of the vent in the engine bay, I just haven't moved it as yet. Hope this helps, there is a local supplier in Siderney if you are looking local. I know it isn't Australian made apologies for that. Again as usual my opinion only, hope it helps. Keep the shiny side up
AnswerID: 27614

Reply By: Greg - Wednesday, Aug 13, 2003 at 23:11

Wednesday, Aug 13, 2003 at 23:11
Have used Castrol VMX 80 in may last two troopys first had done 320k on original box with no problems when sold, current car has done 113k again no isuues.
AnswerID: 27824

Reply By: nugget - Friday, Aug 15, 2003 at 19:40

Friday, Aug 15, 2003 at 19:40
David
I use Redline MT90 in my GQ 4.2 diesel gearbox because it is one of the best oils money can buy. Quality of shift is great whether hot or cold. Expensive at around $10 per litre.
Cheers
AnswerID: 28043

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