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80 series comp truck gearbox issues

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

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Posts: 20
Joined: Tue Dec 01, 2009 6:30 pm
Location: sydney

80 series comp truck gearbox issues

Post by Jimmy-jam »

My 80 keeps popping out of 1st and 2nd gear when I'm in low range goin down hills with no throttle or brakes, would anyone know what is causing this problem because my navy keeps getting cranky when I tell h to hold it in gear lol
WRECKLESS FAB, over engineered mod's
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Location: Weipa

Re: 80 series comp truck gearbox issues

Post by crankycruiser »

does it have a body lift?

if so thats the first place i would look.

My 80 kept doing the same thing (but it was only 2nd and 4th that i had problems with) and it was the rubber boot causing it to jump out, too much tension on it.

sounds like it might be a bit more serious with urs being 1st and 2nd.. but u know what they say! start with the simple shit first!
\
80 xtra cab
Supercharged LS1, Locked n shit

80 Wagon, TD Tourer, locked, Interco 35s, G turbo
Posts: 20
Joined: Tue Dec 01, 2009 6:30 pm
Location: sydney

Re: 80 series comp truck gearbox issues

Post by Jimmy-jam »

yea does have a body lift, but no longer has rubber boot lol, having issues with clutch though with shifting and getting into gear,
WRECKLESS FAB, over engineered mod's
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Re: 80 series comp truck gearbox issues

Post by TheBigBoy »

Yeah sounds like what mine was doing. The vibrations and the gears not smeshing propperly after my gearbox rebuild. Took it back to the shop. Dont know exactly what they did. But its rock solid now.
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Re: 80 series comp truck gearbox issues

Post by Jimmy-jam »

my best bet is too probably to pull it apart and see whats goin on in there????
WRECKLESS FAB, over engineered mod's
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Re: 80 series comp truck gearbox issues

Post by TheBigBoy »

lol no. Best bet dump it off to the gearbox shop for a day or 2. They didnt have to remove athe gearbox on mine to fix the problem. If its the same as mine.
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Joined: Tue Dec 01, 2009 6:30 pm
Location: sydney

Re: 80 series comp truck gearbox issues

Post by Jimmy-jam »

only issue is i have to trailer it there, due to it not being roadworthy lol
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Re: 80 series comp truck gearbox issues

Post by ca18zook »

Make sure u use the factor gearbox oil as this can happen if u fill with 80 90
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Re: 80 series comp truck gearbox issues

Post by dual lux106 »

i have spare box no transfer. if ur interested ph 0413739123 if ur not running the right oil it will make it hard to change gear
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Re: 80 series comp truck gearbox issues

Post by skootin »

Try changing the cup and seat on the gearstick. Cheap and easy if your gearstick flops around in gear this will fix it.
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