Transmission noisy in 5th gear

Diffs, axles, lockers, transmissions, portals, that kind of thing.
eric82000
France
Posts: 12
Joined: Fri Jun 09, 2023 2:39 am

Re: Transmission noisy in 5th gear

Post by eric82000 »

google translate :

Hello Hugues
you'll only have the gears and gearbox bearings working
(without vehicle traction)
by changing gear ratios one after the other (1 2 3 4 5 R)
you may be able to hear more easily than when driving
a possible anomaly
as there's only a small amount of torque transmitted, the noise is less than when under load!
Eric

original
Bonjour Hugues
tu n'aura que les pignons et roulements de boite qui vont fonctionner
(sans traction du véhicule)
en passant les rapports de boite un apres l'autre (1 2 3 4 5 R)
tu peut peut être entendre plus facilement qu'en roulant
une éventuelle anomalie
a savoir que, comme il n'y a qu'un faible couple transmis les bruits sont moins important qu'en charge!
Eric
User avatar
Hugues
Switzerland
Posts: 150
Joined: Tue Nov 29, 2022 6:08 am

Re: Transmission noisy in 5th gear

Post by Hugues »

eric82000 wrote: Sun Jan 26, 2025 3:14 am google translate :

Hello Hugues
you'll only have the gears and gearbox bearings working
(without vehicle traction)
by changing gear ratios one after the other (1 2 3 4 5 R)
you may be able to hear more easily than when driving
a possible anomaly
as there's only a small amount of torque transmitted, the noise is less than when under load!
Eric

...
I did the test today and I can shift smoothly in all gears.
Hugues
From Switzerland
eric82000
France
Posts: 12
Joined: Fri Jun 09, 2023 2:39 am

Re: Transmission noisy in 5th gear

Post by eric82000 »

Google translate

Hello Hugues

If there's no more noise in 5th gear than in other gears
it's likely that the problem isn't with the gearbox.

This is keeping a % error linked to the fact that in the effortless test
Sprockets and bearings (when unloaded) may not make the same noise as when loaded.

For example, a car wheel bearing will be noisier depending on the load it receives (noisy in a bend, quieter in a straight line).

ERIC

Original

Bonjour Hugues

S'il n'y a pas plus de bruit en 5eme que sur les autres rapports
il est probable que le problème ne vienne pas de la boite à vitesse

Ceci en gardant un % d'erreur lier au fait que dans le test sans effort
Les pignons et roulements (a vide) peuvent ne pas faire le même bruit qu'en charge

Par exemple sur un roulement de roue de voiture il ne sera bruyant suivant la charge qu'il reçois (bruyant en en virage, +silencieux en ligne droite)

ERIC
User avatar
Hugues
Switzerland
Posts: 150
Joined: Tue Nov 29, 2022 6:08 am

Re: Transmission noisy in 5th gear

Post by Hugues »

eric82000 wrote: Tue Jan 28, 2025 12:10 pm Google translate

Hello Hugues

If there's no more noise in 5th gear than in other gears
it's likely that the problem isn't with the gearbox.

This is keeping a % error linked to the fact that in the effortless test
Sprockets and bearings (when unloaded) may not make the same noise as when loaded.

For example, a car wheel bearing will be noisier depending on the load it receives (noisy in a bend, quieter in a straight line).

ERIC
...
I'm not sure i fully understand this test honestly
The Pinz was stopped, put the low range lever in neutral, then just shift from 1,2,3,4,5 and R
I was not expecting the 5th gear to make any more "noise" than other gears. There is barely any noise in any gear.
I'm not sure I understand how this test could relate to the noise i hear when driving under load in 5th gear
Most probably i don 't understand how i was supposed to perform this test.
But what is supposed to make any noise if the Pinz is stopped and the transmission is not turning ?
I have a doubt now, do i need to press the clutch when shifting or i was suppose to shift without pressing the clutch ?
I' m a little confused.
Hugues
From Switzerland
eric82000
France
Posts: 12
Joined: Fri Jun 09, 2023 2:39 am

Re: Transmission noisy in 5th gear

Post by eric82000 »

Google translate
Hughes below shows the cascade transmission chain

1-motor output (crankshaft)
2-clutch/disengagement or coupling/decoupling (1 or 0)
3-speed gearbox (0 1 2 3 4 5 R)
4-transfer case, fast and slow (1, 0, 1/x)
5-axle axles (2 for the 710 and 3 for the 712) (3 driver's station levers) 1 or 0 on front axle & differential or lock on front and rear axles (1 or 1/2)
6-wheel reducers or wheel stages (4 for the 710 & 6 for the 712) permanent (1)

You can cut the drive on the 2 on the 3 and on the 4
and deduce where the noise is coming from, knowing what's not being driven.

Always bearing in mind that bearings and sprockets make less noise when not under load.


Original
Hugues ci dessous la chaine de transmission en cascade

1-sortie moteur (vilebrequin)
2-embrayage/débrayage ou couplage/découplage (1 ou 0)
3-boite de vitesse (0 1 2 3 4 5 R)
4-boite de transfert, rapides et lentes (1, 0, 1/x)
5-ponts essieux ( 2 pour le 710 et 3 pour le 712 ) (3 leviers poste de conduite) 1 ou 0 sur le pont av & différentiel ou blocage sur les pont arrières et avants (1 ou 1/2)
6-réducteurs de roues ou étage de roue (4 pour le 710 & 6 pour le 712) permanent (1)

Tu peut couper l'entrainement sur le 2 sur le 3 et sur le 4
et déduire en sachant ce qui n'est pas entrainé d'ou viens le bruit.

Toujours en gardant à l'esprit que les roulements et pignons fonts moins de bruit lorsqu'ils ne sont pas en charge.
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