Synthetic Manual Gearbox Oil ?

Submitted: Wednesday, May 14, 2008 at 12:29

ThreadID: 57593 Views:3229 Replies:4 FollowUps:4

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Member - Glenn D (NSW)

Hows it going guys,

I have noticed my gear changes getting a bit rougher. At first I thought it was only when cold , but its doing it all the time.

I have only done 40k since I changed the oil in my gearbox with the mineral oil recommended in the manual, I dont think thats very long ?

Is anyone using anything other than the standard oil with any success in a GU ?

Thanks,

Glenn.

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Reply By: Robin Miller - Wednesday, May 14, 2008 at 12:42

Wednesday, May 14, 2008 at 12:42

Always used the same 1 synthetic gearbox oils in diffs and gearbox, and it does work well , use same grade in each , think its shc 85w or similar. Note - Have no rear lsd now , but they have a grade for lsds as well.

Robin Miller

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AnswerID: 303731

Follow Up By: Member - Glenn D (NSW) - Saturday, May 17, 2008 at 12:50

Saturday, May 17, 2008 at 12:50

Thanks Robin , going to give the Valveoline semi synth a go .

Glenn.

FollowupID: 570403

Reply By: Mr Pointyhead - Wednesday, May 14, 2008 at 14:36

Wednesday, May 14, 2008 at 14:36

People I know have has good success with redline synthetic gearbox oil. See Redline home page
(No direct affiliation but they do sponsor a cousins race car)

AnswerID: 303752

Follow Up By: Member - Glenn D (NSW) - Saturday, May 17, 2008 at 12:44

Saturday, May 17, 2008 at 12:44

Couldnt find anywhere to have alook locally ,

Thanks anyway,

Glenn.

FollowupID: 570398

Reply By: Member - Barney Rubble - Wednesday, May 14, 2008 at 19:55

Wednesday, May 14, 2008 at 19:55

Gday glen check out valvoline duragear not to sure of the ratio but has fixed a couple of harsh gear change faults at work
but not only that gearbox & diff oils should be changed every 40 thou anyway if not sooner cheers barn

AnswerID: 303801

Follow Up By: Member - Glenn D (NSW) - Saturday, May 17, 2008 at 12:48

Saturday, May 17, 2008 at 12:48

Hey Barney,

Was able to get this locally so will give it a go ,

My manual says gearbox oil very 100k , but I guess you can tell when it needs it.

Glenn.

FollowupID: 570402

Reply By: bob&loz - Wednesday, May 14, 2008 at 22:30

Wednesday, May 14, 2008 at 22:30

Glenn
Use the Castrol syntrax 75-90 It made my 2001 GU feel like a car and I put it in the new GU at 1000k, smooth as
Bob

Ps
when I drained the oil on the new GU at 1000k the amount of metal on the magnet was the same as the old GU was when I changed it for the first time at 50,000k
Bob

AnswerID: 303845