Landcruiser gearbox locked in gear

Submitted: Friday, Jun 05, 2015 at 12:42
ThreadID: 119094 Views:8208 Replies:6 FollowUps:3
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Hi Folks,
have an issue with hzj79 gearbox locked in reverse. It still drives in reverse, but will not disengage and needs to be started with clutch engaged or with transfer in neutral.
Stick shift pattern is restricted to a small area.
Initially noticed that couldnt get 5th gear on the way home from shops. Upon arriving home have pulled up on driveway and shifted into reverse to perhaps free up something inside the box and now it goes backs quite well.
This ute has only done 111000ks.

Anyone got experience with this.??
Have consulted the Haynes manual!
Not much chop.

Any assistance would be appreciated.

Brutus WA.
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Reply By: TomH - Friday, Jun 05, 2015 at 13:12

Friday, Jun 05, 2015 at 13:12
Is it in 4wd and you have windup If so would have been hard to steer around corners.

Other thing could be fault with gears on shaft and they have moved or selectors faulty
AnswerID: 554601

Reply By: 671 - Friday, Jun 05, 2015 at 13:52

Friday, Jun 05, 2015 at 13:52
Make sure the round plastic seat that the gear lever ball sits in has not started to break up. If it has then the lever will sink lower into the box resulting in the end of the lever binding in the selectors. This will make gear selection difficult or impossible.

I worked on the 60 series when they were new and must have fixed about half a dozen of them. The problem may still occur occasionally on later models.

Try holding the lever down low while pulling it up firmly against its retaining spring as you change gear. If that makes a difference then it is almost certainly the seat.
AnswerID: 554603

Reply By: Bob Y. - Qld - Friday, Jun 05, 2015 at 14:01

Friday, Jun 05, 2015 at 14:01
How long since you checked the g'box oil level, Brutus?

When you said: "..........couldn't get 5th gear on way home from the shops" that started alarm bells ringing for me. Using 5th gear under 80 kph is just asking for trouble, especially with the weaker box behind the 1HZ. Any stress on the 5th/reverse gear selector and shaft will give you grief.

I'd be taking it to a transmission specialist to get some help from them.

Bob

Seen it all, Done it all.
Can't remember most of it.

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AnswerID: 554605

Reply By: get outmore - Friday, Jun 05, 2015 at 14:09

Friday, Jun 05, 2015 at 14:09
this is an easy although expensive fix
- get it too workshop
- throw gearbox in bin
- fit new gearbox

they are a disposable item - anyone who cares to disagree with me I can get a pick of the pile of them outside the LV workshop this arvo
AnswerID: 554607

Follow Up By: mountainman - Friday, Jun 05, 2015 at 17:08

Friday, Jun 05, 2015 at 17:08
Got any hj75 gearbox/transfer cases lying around ???
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FollowupID: 840733

Follow Up By: get outmore - Friday, Jun 05, 2015 at 18:14

Friday, Jun 05, 2015 at 18:14
nope - 2 reasons
much better box and the hzj79 is getting long in the tooth now - mostly v8s
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FollowupID: 840736

Reply By: Matthew G3 - Friday, Jun 05, 2015 at 17:26

Friday, Jun 05, 2015 at 17:26
HI Brutus
If it is stuck in gear jack up the back end and rock the back wheels back and forth, it may drop out on its own or get someone to put SLITE pressure on lever while you rock wheel. Works on miss shifted truck boxes.
Matt
AnswerID: 554617

Reply By: brutus - Saturday, Jun 06, 2015 at 01:20

Saturday, Jun 06, 2015 at 01:20
Thanks folks for the suggestions.

Definately not in 4wd.

Pulled gear lever and checked seat as well as the bush this arvo, both almost as new(this was my 1st thought also).

Oil level ok, currently running quality full synthetic gear oil.

Will try jack up and rock drivetrain next.

Spoke to a trans rebuilder today and he reckons wear in the spaces between gears and selectors not picking up.
But there have been no prior indicators of wear till now.

Once again thanks for the input folks.

Brutus WA.
AnswerID: 554628

Follow Up By: brutus - Monday, Jun 08, 2015 at 16:45

Monday, Jun 08, 2015 at 16:45
Hey folks,
have got around to jacking up the rear of the trusty 79( now not so trusty ) today and oddly enough the driveline can be rotated from the back wheels with no sign of horrific noises.
However still remains locked in reverse with engine running or not??....
Anyone got any other ideas??
Transmission shops only want to sell a full rebuild or new trans and not diagnose the vehicle.

Brutus WA.
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FollowupID: 840818

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