Crunching gears

[luke28]

So my 3rd and 4th gear crunch it used to be just 3rd but now its 4th aswell if I double clutch going up gear its fine but crunches going down unless I've got the brake on a touch and the revs in a certain spot I've been told on here its probably the syncro rings or bar "cant remember what its called dont know much about it" anyway just wondering if I dont fix that is it going to do worse damage to my gearbox

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[BigRAWesty]

Pretty certain the sincromesh gears are shot..
But if you keep crunching them they won't last.. when slowing use the engine as much as possible. Clutch and hold a slight pressure at the gear you wanna select and give it a good rev. It should slide in crunch free..

By using the engine it saves your brakes to..

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[luke28]

I have to do that for reverse sometimes

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[BigRAWesty]

Have you checked your clutch fluid lately?

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[luke28]

Yeah just filled it when my clutch master buggered up

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[BigRAWesty]

Yeah just filled it when my clutch master buggered up

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Bleed it? You may have some air in there and not throwing the clutch fully..

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[luke28]

I bled it 3 times when I replaced it just to make sure but it was crunching before that anyway

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[BigRAWesty]

No worries, just checking.. so yea, try not to crunch em.. :p

Kallen Westbrook
Owner of
Westy's Accessories (http://www.nissanpatrol.com.au/forums/showthread.php?15134-Westy-s-Accessories.-A-small-back-yard-builder.)

[luke28]

Ill try what you said but 4th allways catches a little going down

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[growler2058]

Those clutch slaves are a major Effker to bleed properly man


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[93patrol]

Don't forget the bleeder nipple on the passenger side near the diesel fuel filter. I missed this one and could figure out why my new clutch was buggered


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[88GQwithlift]

my moneys on syncros are worn...

[Parksy]

Try a tube of nulon diff and gearbox treatment. The stuff works a treat. When I added it to my box, there was an instant improvement in shifting, and this improvement continued over the coming months.

[luke28]

I actually got a litre of that in the shed got to put it in

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[scott.a.green]

As 3rd and 4th are on the same layshaft, I'd be looking at the syncros.