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Discussion Starter · #1 ·
When they say a gearbox is "notchy" or shat shifting gears is "notchy" what does that mean?
 

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naturally asthmatic
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When they say a gearbox is "notchy" or shat shifting gears is "notchy" what does that mean?
It means it doesn't easily change into the gear selected. I found that Redline MTL took care of my gear box issues. A lot of people mess up their gear boxes by using a GL5 oil instead of the proper GL4 oil.
 

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It means it doesn't easily change into the gear selected. I found that Redline MTL took care of my gear box issues. A lot of people mess up their gear boxes by using a GL5 oil instead of the proper GL4 oil.
Gday, i have this Notchy gearbox issue, first thing in the morning its hard to get into 2nd gear, what is the best oil to counteract this with my GU 4500 ??

Cheers
Brett
 

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not to sound like a smart ass but the owners manual will have an oil grade chart in it toward the back i would be consulting that or asking a dealer , the reason for this is my brother just put a new engine in his landcruiser and the mechanics book stated 20/50 and they were wondering why it sounded chatty
also my old rocky had a notchy box for years same as described only when cold and after taking it to a dealer for service did it go away and it was the same deal the general oil book the mechanics had stated the incorrect grade (to thick) and this was the reason it became ok when warm

mick
 

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naturally asthmatic
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Gday, i have this Notchy gearbox issue, first thing in the morning its hard to get into 2nd gear, what is the best oil to counteract this with my GU 4500 ??

Cheers
Brett
A synthetic gear oil of the correct type (GL4) will often help a box which has gotten chatty or difficult to shift when cold. Like I said in my post, I have Redline MTL in my box. It's great stuff and a treat when it is -25C or 35C.
 

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Discussion Starter · #8 ·
Agreed. Useful information - thanks for getting me up to speed.
 

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I had the same problem in my gu and after trying somany different oils i desided to add nulon g70 additive and what a big improvement it has turned out....
 

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2nd gear was always notchy on my GU from the day i got it.
changed oil to castrol syntrans 75/85 art 25000k.
changes are smooth now.
 

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are there any other suggestions as to why gearboxes are like this because mine has been like this since day dot but has slowly been driving me nuts i have tried heaps of different oil grades with no solution found as yet.

the warranty only has 12 months left on it and if it is an internal fault on the gear box i would like to get it fixed before it costs me the earth to get done.
 

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sticky spigot bush.
clutch adjustment.
thats about it excluding a badly built box. Though runnign GL5 oils will do permanent damage, its a chemical reaction with the synchro rings.
 

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Have a talk to a trans specialist. They may be abe to specicy an oil that will be better suited than what you are using. I did this with my Rodeo. I bought it new, and it was notchy. My local trans guy put me on to a specific oil (Penrite in this case) that he had used successfully.

My box has been rebuilt, and shifts very well now. Not sure what oil is in it though, as it has not been changed since the box was rebuilt.
 
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