80 series Gearbox Problem

Submitted: Monday, Feb 09, 2004 at 22:27
ThreadID: 10406 Views:1723 Replies:4 FollowUps:2
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A mate of mine has an 80 series. After reversing a few times [such as hitching up his caravan] the gearbox locks up and cannot get it out of reverse.The only way out is to turn off the motor an d then it can be shifted out of reverse. He was talking to another 80 series owner who also had the same problem . The local Tojo dealer did not have any answers. Has anyone else had this problem. Stan
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Reply By: Eric.- Monday, Feb 09, 2004 at 23:00

Monday, Feb 09, 2004 at 23:00
Sounds like a clutch problem to me . The clutch is mostly neede for 1st and reverse . I had asimilar problem in my Gq ended up been a soft pressure plate not releasing the clutch plate . It could also be a week clutch master loosing pressure , try pumping the clutch pedal when this happens .Venus Bay
AnswerID: 46081

Reply By: Member - Paul- Tuesday, Feb 10, 2004 at 06:31

Tuesday, Feb 10, 2004 at 06:31
I had a similar problem with a car years ago. Back out the drive, stop, try and select first gear and crunch. It got so bad that I had to stop the engine disengage the clutch, select 1st, start the engine and then proceed. Always happened when the car was cold, never after it warmed up. Took it to a transmission specialist and was advised that the clutch plate - flywheel had worn so smooth that a partial vacuum had formed within the friction plate recessed rivet holes.

When the slightly warmed friction plate came into complete contact with the cold flywheel the warm air trapped within the rivet recesses cooled and formed a partial vacuum sticking the friction plate to the flywheel. Disengaging the clutch only released the pressure plate and the friction plate remained struck to the flywheel. The fix was to remove the clutch and drill very small holes through the rivets which would allow the air pressure to equalise between the friction plate and the flywheel.

Next morning and from then on no problem. At the beginning I had trouble digesting the transmission specialist's explanation but had to agree he was right.
This is probally due to the difference between a specialist ( with experiance )and and dealer mechanic.
AnswerID: 46103

Reply By: Joe - Tuesday, Feb 10, 2004 at 08:23

Tuesday, Feb 10, 2004 at 08:23
Hi Stan,
Don't have an answer to your question,but thought I'll add my bit on 80 series gearboxes. In 2000 I picked up a 95 model 80 series for $ 16000 in very good nic, the bloke who had it couldn't sell it because you could not down change into 2'nd unless you doubled the clutch ( that scared a lot of people off). Anyway before I bought it, I rang 5 transmission places in Brisbane, everyone of them knew the problem straight away, a couple of them even finished the sentence for me. Three said if every body drove a Nissan they wouldn't have a job. This was there opinion not mine as I have had toyota's all my life & own 2 at the moment.

AnswerID: 46111

Follow Up By: Member - Jack - Tuesday, Feb 10, 2004 at 10:44

Tuesday, Feb 10, 2004 at 10:44
Hi Joe:
Can you let us know what the progblem was diagnosed as? I have to double de-clutch on occasions (but not always) and might need to kknow this in the future.
JackNo trees were harmed in the making or sending of this message.
However a great number of electrons were terribly inconvenienced.
FollowupID: 308051

Follow Up By: Joe - Tuesday, Feb 10, 2004 at 12:58

Tuesday, Feb 10, 2004 at 12:58
Giday Jack,
It was the syncros in 2nd, 3rd was a bit clicky also though not as bad as 2nd. Quotes were all around $1500 to do all syncros plus seals etc & removal & installation.

FollowupID: 308061

Reply By: Member - DOZER- Tuesday, Feb 10, 2004 at 13:29

Tuesday, Feb 10, 2004 at 13:29
Gday Stan
The 80 has a spigot bearing on its way out or as mentioned earlier, a worn clutch.
With the spigot (that sits in the rear of the crank and holds the input shaft of the box) you should hear it complain whilst idling in gear at the lights. U may also feel the car wanting to proceed. You will definately have crunching problems between some or all gears and double shuffling will help this.
With the clutch, check that there is no or little play in the clutch fork when pedal is up. This is on the bellhousing of the gearbox.
If you decide to replace the clutch look for a Daycan clutch for it and a new spigot brg aswell.
Andrewwheredayathinkwer mike?
AnswerID: 46144

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