Gear change

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17 Jul 2019 14:41 #1 by Hedgie
Hedgie created the topic: Gear change
Can someone point me to the articles on modifications to improve the gear change please.
Probably in plain sight, I just must be blind.

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17 Jul 2019 15:54 #2 by Holmz
Holmz replied the topic: Gear change
What needs to be improved?
Or how is it lacking?

I was not able to find synchros, but sometimes the fluids can help.

Or is it linkage you are trying to sort out?

Going into one of the gears... mine needs a flick towards the passenger seat at the last inch... and it made a nice difference.

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17 Jul 2019 16:32 #3 by Hedgie
Hedgie replied the topic: Gear change
There were some modifications that were made to the linkages, although not sure if it was a XT or LT mechanism that was being addressed. It may just be an adjustment issue on my LT, but the change into 4th is a problem. I pretty sure it is not a fluid issue.

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17 Jul 2019 18:46 #4 by Hedgie
Hedgie replied the topic: Gear change
Managed to find the info I was looking for confirmed with a call from Brett, Thanks.

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18 Jul 2019 04:36 #5 by Holmz
Holmz replied the topic: Gear change

Hedgie wrote: Managed to find the info I was looking for confirmed with a call from Brett, Thanks.


Can you post that info?

My problem was going into 4th as well, so I should probably read it too.

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27 Jul 2019 10:35 #6 by Hedgie
Hedgie replied the topic: Gear change
The modification was made on the XT change and I have a LT which is okay. All the joints are ok so will need to have another look over it.

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27 Jul 2019 12:16 #7 by mort
mort replied the topic: Gear change
Hi Hedgie, I have helped a few owners over the last couple of years with their gear change issues and none of them have been the same issue.
So here is a list of things to look for.
The gear stick mechanism is dry and binding and/or the top plate is screwed down too tight resulting in hard gearstick movement.
The flexable joint at the end of the gear rod is seized resulting in hard gear change.
The arm from the gearbox which connects to the gear rod is set wrong resulting in gear stick too far forward or back and difficult to get 1 or more gears.
The rod or brace from bell to gear rod is ajusted wrongly resulting in hard to get some gears.
All are fixable on your own but better to have some one in cab moving gear stick so you can see from under what is happening and make ajustments.
But if it is in the gear box then could be wrong oil low oil or synchrows its hard to tell without a description of the problem.
Martyn

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27 Jul 2019 13:23 #8 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Gear change
Pre OKA, I had a 5 speed fitted to an F350 4WD and the gear change was terrible. We eventually fixed it by changing to hydraulic oil (ATF). I would never have believed the difference.
Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

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27 Jul 2019 14:51 #9 by Peter and Sandra OKA 374
Peter and Sandra OKA 374 replied the topic: Gear change
The Nissan Patrol transfer case fitted to ours and quite a few other Oka's can be filled with either 80/90 gear oil or ATF, Nissan specified both for different Patrol variants. The reason was that on later vehicles with automatic front hubs the thicker 80/90 gear lube would sometimes cause the front tailshaft to turn when in 2wd which in turn caused the auto hubs to lock so to stop it happening Nissan specified the much lighter ATF. BUT I have been advised by both a retired Nissan specialist and others that have a lot of experience with Patrol's that if I want the transfer case to last and not wear out prematurely I should use gear lube rather than ATF.
Putting a better quality/synthetic transmission oil might be a better solution.

OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 680w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.

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27 Jul 2019 17:06 - 27 Jul 2019 17:11 #10 by Holmz
Holmz replied the topic: Gear change

Peter and Sandra OKA 374 wrote: ...

Putting a better quality/synthetic transmission oil might be a better solution.


The Redline brand at least has specs on it... And as it has the highest shear strength, there is some evidence that it may be "better".
So a lower weight Redline may have as much shear strength as a different brand's higher weight.
Anyhow I use and their bearing lube, water wetter, and their engine oil.
I think it is the GL5 that went into the transmission, but I am not 100% sure.

(They were in Birba lakes for those in Perth, however I am not sure that they still operate out of there?)

I had a "notchy" transaxle in a small car, and used their "Shockproof light". It totally transformed that gear box.
They has a hapeavyweight version, but I have heard that it is hydroscopic (sucks up humidity out of the air).
Whether it would help a notchy OKA I am unsure, but it would likely be the "Shockproof Heavy weight" for a truck.
Last Edit: 27 Jul 2019 17:11 by Holmz.

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27 Jul 2019 18:56 #11 by mort
mort replied the topic: Gear change
Frank had found an update to specs that had a single weight oil with no modifiers and I believe he could only find redline to be the only one available, I have a fully synthetic in mine with no issues.
I believe the reason for non modified was the gears are so finely spaced that a thicker oil was causing hard gear changes.
Martyn

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