New box, no reverse

[StuBiggs]

G'day,

After some advice. Just put a secondhand r151 box in my '91 LN111r, replacing clutch along the way. Everything bolted together sweetly.

All forward gears are working beautifully but reverse gear simply doesn't seem to exist. No grinding or hint that it might want to go in, just hits a wall, whether the ute is running or off. 

I'm at a loss and any hints would be helpful.

Thanks in advance 👍🏻

[trentmeyer23]

You may have been given a dud box.

[StuBiggs]

Yeah I'm starting to think that. Buggered reverse selector fork, may?

[trentmeyer23]

I'm not sure if they are a shared or dedicated reverse shift fork. There is likely a reverse lockout assembly as well, this usually stops you putting it in reverse when going forward. This assembly could also be damaged or seized.

But if it is effectively dead ground where reverse should be, I would doubt it is a lockout issue and more likely fork related, or even worse.

Did you purchase it privately or from a wreckers?

[Tony Prodigy]

That really sucks Stuart.

Sounds like the box is no good mate. At least it isn't a dud replacement engine.

I replaced an engine on my dad's Mazda light truck years ago and was assured by the wrecker that the motor was fine. Yeah right !!

After all the hard yakka removing and replacing the engine, it turned out to have a horrendous big end knock. I was ropable !!

Anyway, the wrecker bloke came over to take a look and was red faced. I was given another motor, but had to do the job all over again which sucked big time.

That motor is still going ok, thankfully. It's been around 12 years now, 

Good luck with box situation.

Let us know how how get on.