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GQ Wagon TB42S
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Well done on getting it out and partially dismantled.

If you're looking for a service manual, you can find one on this forum - plug it into the search function and it should show up.

If you want someone else to repair it, you probably should add a location so recommendations are relevant to you.


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Y2KGUII ZD Wgn
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Chasing GEARBOX information or GEARBOX specialist. Cheers
Well done on getting it out and partially dismantled.

If you're looking for a service manual, you can find one on this forum - plug it into the search function and it should show up.

If you want someone else to repair it, you probably should add a location so recommendations are relevant to you.


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Or better still, just click on the manual link in my signature :).
 

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Discussion Starter · #4 ·
Cheers for the info, no just after knowledge,

In neutral, input shaft and gears spin freely. Also in neutral, trying to turn the output shaft, no go, what could be binding it up? Not locked solid, turns a bit then excessively tight. Don't want to force it.

In addition, getting new bearings, checked gears, all good, what else does one look for when inspecting these ones. Any weak bits or tricks to check? What do you look for re worn sincros?

The shaft spline failure in fifth, is that only early gu, of can it affect gq boxes as well?

Lastly any good quality bearing/seal kits? Oh and how does the little bearing behind fifth gear get removed, the one that goes in the extension housing, or is it a full output shaft strip and re assemble?

PS THIS IS GOING BACK BEHIND A 6BT CUMMINS SO ONLY WANT TO DO IT ONCE.
 

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nissan
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If you haven't yet bought any parts and were waiting to see what it was like inside then I'd seriously consider getting a box from a low km car from a wreckers rather than continue with what you have. When I was looking at replacing the weak overdrive in my GU and doing a box rebuild at the same time while replacing the clutch, the prices I got were something like $700 for bearings, seals and syncro springs, $350 for overdrive gear and main shaft, and to top it all off, $150 per synchro ring with the box containing 6 of them. I priced a second hand box from a wreckers and it was under $2k while a professionally reconditioned exchange box with warranty was under $3k.

I ended up doing nothing and putting it back in how it was since the box was working fine at the time. Still waiting for 5th gear to blow up.
 

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Discussion Starter · #16 ·
Thanks for the advise, can't afford to do that, we tow a van and the engine is a 6bt cummins so it eats gearboxes. The box in the car is coming out this week, this is just a spares box for if we need parts or if we need to put it in instead. I'm just doing the 5 main bearings and the 2 seals. I'm hoping that's all that is needed in the other box. I guess this tear down and inspection is practice and preparation.
 
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