Have i damaged th GU

[1peter]

I took my just bought 98 Auto 4.5GU out for the 1st time today and i was changing from 4 wheel high range to low range and it was grinding badly between changes i tried pulling it in quickly a few times and it went in but sounded horrible. I then read the instructions behind the visor and felt like a complete idiot. Obviously the problem was that i was stopping in neutral between low and high range then pulling it through. I hate thinking about the noise, cruuuuuunch, did i damage her ?? Everything changes sweetly now but should i drop the oil out that i have only just changed or what. Any advice appreciated and any laughing at me is deserved.

[MudRunnerTD]

hehehe You idiot!

That would have taken some doing i reckon, she would not have liked that at all. Does it change ok Now? is there any noise in the gear box? did you change the fluid yourself recently or pay to ahve it done?

If you did the fluid change yourself then you know how to do that, it might be worth dropping it to put your mind at ease then put it back in, no need to change it if it is fresh and clean i reckon.

Good luck, remember that noise forever Pete, and Never do that again ya goose....

lol


p.s., nice bike, looks like an 02, 03? is that the 955 or the 1050?

[belzi82]

I did the exact some thing the first time I took the patrol out, no damage done to mine so you are probably fine.

[luxo barge]

I'd drop the oil just to be safe as metal filings in oil ain't good. For the cost of new oil it's cheap insurance, and hope you aint caused too much wear or damage. I think it will be right if all shifts good now, but still change the oil.

[1peter]

I'm not sure exactly how the transfer case operates, should i change the tranny oil as well or just transfer case ?? Mudrunner, there is no noise at all and everything is changing fine and the bike is an 04, glad you like it. They ran the same model from 02 to 04.

[1peter]

Hey belzi82, can you describe exactly what you did ? how many times etc ?

[Rip'n'Shred]

Sounds like you were changing whilst still in drive or reverse. Put the tranny in park or neutral when you change to take load off transfer.

[nissannewby]

Just the transfer mate will be all good if its shifting sweet and not skipping teeth then just drop the oil

[1peter]

Rip'n'shred, i was stationary but paused in neutral when changing between low 4 and high 4 and back again. Thanks nissannewby.

[hekarewe]

just remember the transfer case is not sycromesh,,,, as is the main box. shifting on the fly in the transfer case is not recomended unless your compertant at shifting crash gear boxes. when in doubt shift whilst stationary with clutch in or in neutral in autos. I do shift mine on the fly but i drive a crash box for work and mne is manual as well which helps.

crunching the gears once or twice is no real biggy,,,, as the gears are fairly solid but DONT make a habbit of it as they will let go when most need them. hope this helps

[1peter]

Thanks, i did not shift on the fly, it was all stationary, but sounded bad. lol.

[belzi82]

Hey belzi82, can you describe exactly what you did ? how many times etc ?

I was trying to change for 4H to 4L and didn't put car in neutral however I was stopped, made a grinding noise real bad. I did this the first few times, had it look at and all was fine.

[DX grunt]

Just the transfer mate will be all good if its shifting sweet and not skipping teeth then just drop the oil

Congrats on cracking 100 posts. Well done :icon_victory: :bigthumbup: :thumbup:

[Rip'n'Shred]

As soon as you put transfer in neutral, the gearbox can spin as if in gear but with no load on driveline it can free spin. Ie. The gears are turning. Your trying to crash moving gears into stationary gears to join transmission to driveline. One is spinning, the other is not.

Just put transmission into neutral and stop vehicle when you change from high to low or low to high.

[Silver]

Thanks, i did not shift on the fly, it was all stationary, but sounded bad. lol.

see above. 1peter wrote that he was stationary, yet still got the 'can't find 'em, grind 'em!' sound effect.

[Rip'n'Shred]

and didn't put car in neutral

I think this was where the problems lyes

[nissannewby]

peter is this car an auto?

[1peter]

The car is an auto, the gearbox was in neutral and was stationary with the engine running. As i originaly posted the problem was that i hesitated in neutral (between low 4x and high 4x) with the transfer case.

[Rip'n'Shred]

Sorry I thought you meant you were in drive in transmission.
You shouldn't really have a problem putting it in neutral in transfer then into low or high.

[Bob]

I can put into neutral and then into low or high without any crunching of gears. Mine is a Manual Transmission
The only thing that I can think of is that your are revving your Motor too high and the Auto Transmission is driving the Transfer Case

[1peter]

Nup, not revving the engine at all Bob, are you talking about putting yours in neutral in the transfer case, not the gearbox ?? On the visor of my car it clearly states that you should not hesitate between high and low 4 wheel drive. As soon as i stopped doing this, there was no more problem, not a sound, just smooth transition. My post was more to do with wondering if i had originaly damaged anything ?? Maybe auto boxes and manual boxes operate differently with the transfer case ?

[taslucas]

The car is an auto, the gearbox was in neutral and was stationary with the engine running. As i originaly posted the problem was that i hesitated in neutral (between low 4x and high 4x) with the transfer case.

I have found with my GQ TB42 auto, when i put it into 4low i have to hold it there while i move the transmission to drive (or reverse)with the other hand.

[taslucas]

I have found with my GQ TB42 auto, when i put it into 4low i have to hold it there while i move the transmission to drive (or reverse)with the other hand.

I have ground mine a few times while learning to do this! All good though. Thats why we love patrols......they are tuff!

[Bob]

Nup, not revving the engine at all Bob, are you talking about putting yours in neutral in the transfer case, not the gearbox ?? On the visor of my car it clearly states that you should not hesitate between high and low 4 wheel drive. As soon as i stopped doing this, there was no more problem, not a sound, just smooth transition. My post was more to do with wondering if i had originaly damaged anything ??
Yes I was talking about the Transfer Case.
Just checked the instructions on my Visor and it says nothing about hesitating between high and low on the transfer Case.
Must be different with an auto transmission

[taslucas]

Yes I was talking about the Transfer Case.
Just checked the instructions on my Visor and it says nothing about hesitating between high and low on the transfer Case.
Must be different with an auto transmission

just checked my visor....Yep it says to change the transfer between 4H and 4L in one movement and not to pause in N as this causes gear clashes. I have '91 TB42 Auto so it must be an auto thing

[Yendor]

Hi Peter,

I don't think you would of done any damage.

Just checking......did you use the correct type/grade oil when you did your oil change?.

Cheers Rodney

[macca86]

no point in having teeth if you don't clean them once and awhile haha

[Bigrig]

Thanks, i did not shift on the fly, it was all stationary, but sounded bad. lol.

Personally, if you were stationary I'd be very surprised if you even gave it a hurry up (they're tough boxes), but as said, just for peace of mind if you want to drop the transfer case fluid just to be sure of no filings, then do that mate - at least puts your mind at ease, but as said, would highly doubt you've done any real damage as such.

[1peter]

Thanks Bigrig, like i said everthing is changing smoothly now so hopefully all is ok.

[Silver]

Hi 1Peter,

Do you remember if your tfr case drain plug is magnetic? Most are.

If your is magnetic, evidence of your handiwork will stick there, and not float around further in the tfr case causing trouble

[1peter]

I will find out when i drain the oil silver, thanks.

[nissannewby]

I would say with the auto as your still getting some sort of frictional drive through it when in neutral this is why it says not to hesitate where as with the manual nothing is driving the output until you select a gear and plus when you have the clutch in no drive is going through the box. I would be inclined to say it will shift easier between the 2 if it were in park with handbrake off.

[Silver]

I will find out when i drain the oil silver, thanks.

Hi 1peter,

some fu22 on the magnetic drain plug is not unusual.

I could have expressed my post better - the main point is that whatever presumably minimal damage has been done won't be made worse by any filings released as a result, as the magnetic plug will trap them, rather than, for example, let them be trapped in the moving part of a bearing.

[1peter]

I rang an auto specialist shop this morning and the guy said, don't worry, and that i would have to continue crunching it for a couple of months before i would do any damage. He also said, don't worry about changing the oil again (i did it 4 months ago) because they are like truck boxes and in all the time he has been working on gearboxes he has never had to repair a Nissan transfer case. Go the Nissan.

[taslucas]

I would say with the auto as your still getting some sort of frictional drive through it when in neutral this is why it says not to hesitate where as with the manual nothing is driving the output until you select a gear and plus when you have the clutch in no drive is going through the box. I would be inclined to say it will shift easier between the 2 if it were in park with handbrake off.

They seem to prefer N to change between 4h and 4 low. I think it has to do with the ATP(the thing that stops it rolling when in park)

tappa slappn about

[FullFlxd]

With the New car Im always so worried about F@#$king something up changing into 4 wheel drive was one of them. In the old MK I used to change from 4H to 4L whilst driving (mainly on the beach) Only crunched the first time, never found excess ground metal when changing fluids in trany or transfer case. Dam I miss that car R.I.P

[Rip'n'Shred]

Shouldn't be too much drama with damage. Sounds like you know the correct procedure now. As previously mentioned it would be worth draining and replacing the oil in transfer. Cheap insurance.

[Crusher_AU]

Is this an auto only thing?