Strange noise on rear diff?

[Bliksempie]

Saturday evening as I returned from a lovely Golf Day at Blair Atholl (Thus the reason for not attending De Wild), I heard a strange noise on my SFA. Whilst driving on the highway at normal 110-120 kp/h. Its sounded half like a rumbling sound coming from the rear, and when releasing the accelerator, the sound disappears. As I've had worn diff issues in the past, I am familiar with the sound that a diff makes when not drained after a river crossing. Last mentioned is more a grinding noise than a rumbling noise.

Yesterday morning I noticed oil on my garage floor. It came from the left rear drum, which indicates to me that the outer oil seal on the drive shaft obviously needs to be replaced.

I could be wrong, but maybe there is something else wrong that caused the outer oil seal to start leaking?

[CasKru]

Are you 100% sure it's oil and not maybe brake fluid? Just thinking the slave cylinders could have started leaking and the rear brakes binding causing the sound.

[Bliksempie]

Cassie,

Nee, ek het dit geruik. Dis definitief Diff olie.

[CasKru]

Wat ek al gehoor het.... met ons waens wat nou al 'n hele paar jaar oud is, met al die abuse ens dan buig die axle housing ever so slightly wat dan beteken die shaft loop nie meer 100% dead center nie. Dit is een van die gevalle waar hy kan begin lek. Anders is dit dalk 'n geval van 'n bearing wat collapse het?

[Bliksempie]

Het sopas met die ouens van Gearmax gepraat. Klink my dit mag dalk net wees dat die Wheel bearing klaar kan wees, en gevolglik die lek veroosaak het. Ek sal maar die komende naweek oopmaak en maar al die bearings nagaan en vervang soos nodig. Dit sal eintlik geriefliker wees as ek die vol beraing kit iewers kan kry. N1 4X4 kan ongelukkig nie daar help nie omrede dit 'n Local Diff is.

[CasKru]

Jy sal dit vinnig kan optel as jy hom op jack en met die hand draai.... ek het my bearing self gedoen. As jy dit self gaan doen moet net nie die bearing warm maak met 'n blowtorche om hom af te kry nie (klein bietjie is fine maar rooi warm soek jy vir moeilikhied) want dit vorm dan 'n swak plek op die shaft waar hy dan makliker in die toekoms kan snap.

[Bliksempie]

Het hom so dankie. Is darem nie veel gestremd met my hande nie, en glo ek sal regkom. Ek sê altyd: As jy die regte tools het, is die werk 90% klaar.

[mcw]

Haal die shaft uit en vat hom na Gearmax toe koop nuwe brearing kit by hulle ,en laat hulle dit sommer op druk vir jou
myne so gedoen

Martin

[Bliksempie]

Thanks Martin,

Jy kan nie onthou wat dit gekos het nie? Het reeds prys van vol kit by Ultimate 4x4 gekry en gedink ek sal dit heel moontlik goedkoper kan doen.

[Bliksempie]

What a weekend....

Replaced the following:

1) Wheel Bearings + Oil Seals
2) Centre Bearing
3) U-Joints
4) Gear Box Oil seal
5) Diff, Transfer and Gear Box Oil.

Alles loop reg, altyd reg... Toyota. Fells like a new bakkie.

[CasKru]

Lekker man... bly hy is nou weer spiekerish.

PS: hoop jy het die center bearing by Toyota self gekry. Die ander hou eenvoudig net nie so lank nie

[Bliksempie]

Cassie,

Net so. Selfs die Wheel Bearings ook. Dis nie asof ek binnekort die outjie wil verkoop nie, anders het ek goedkoper gegaan met Pirate Parte.

[CasKru]

Awesome....

[Bliksempie]

Hallo Julle klomp slim mense,

Two years later, and i'm back on this topic: There is a strange vibration/rumbling noise when engaging 5th gear. The rest of the transmission runs smooth, but as soon as I go into 5th gear, it sounds like a rumbling (not grinding) sound. Any ideas on what this might be?

If it is the Center Bearing, then it should be continuous throughout all gear selections, or am I wrong on this?

[Mud Dog]

Sounds very much like its gearbox related, Robbie. Not good news, I know, but take it past Mayfair Gearbox and ask their opinion.

[Stef]

take it past Mayfair Gearbox and ask their opinion.

I don't have much faith in Mayfair's diagnostic capabilities nor their addiction to silicone....I'm of the opinion that I would have been better off leaving the box as it was. R14k wasted

[Bliksempie]

Sounds very much like its gearbox related, Robbie. Not good news, I know, but take it past Mayfair Gearbox and ask their opinion.

Thanks Andy,

I spoke to Louis Zanoli this morning, and he also mentioned a few things. The first thing I intend to do is to replace the Center bearing (Again), all universals and then balancing of the prop shaft. I very seldom tow in 5th gear, and don't think that the gear is worn. Yesterday I quickly inspected and felt everything for signs of heat and leaks. The only thing I could see was that there is a small amount of gearbox oil around the output shaft area which indicates the oil seal needs to be replaced. There also is a small amount of play on the first universal (front to back). Thus the reason for sommer replacing all three of them. Also thought of having the yoke inspected, and replaced if necessary.

Will keep you updated if mentioned steps solved the issue.

[Mud Dog]

Why I mentioned them Stef, is that I know they're nationwide and I've always had great service from the local branch. Perhaps the Gautengers can give a better referral where Robbie can have it checked out before replacing carrier bearing and universals again.

Robbie, just to mention, the X-fer box and gearbox are separate units with their own oil if the output is leaking it doesn't necessarily mean that the gearbox oil is being lost, unless the seal between the two is leaking as well.

[LouisZ]

Hi Robbie,

Nou net ene gery wat presies maak soos joune. In 5de ry teen 80-90km/h. Voet afhaal dan hoor mens die geluid as jy jou voet afhaal. Versnelling niks. Ook in ander ratte nie juis iets.

Onder in geklim en wat kry ek. 2 universals het play en die yoke het nogals play. Centre bearing is reg. Net die prys om dit te doen is erg, R3544. Die goedkoopste wat ek kry op 3 plekke.

[Stef]

Jis ma dit het al duur geraak....

[Bliksempie]

Hi Robbie,

Nou net ene gery wat presies maak soos joune. In 5de ry teen 80-90km/h. Voet afhaal dan hoor mens die geluid as jy jou voet afhaal. Versnelling niks. Ook in ander ratte nie juis iets.

Onder in geklim en wat kry ek. 2 universals het play en die yoke het nogals play. Centre bearing is reg. Net die prys om dit te doen is erg, R3544. Die goedkoopste wat ek kry op 3 plekke.

Louis,

Ek neem aan die yoke het die prys aansienlik opgestoot. Die U-Joints is definitief nie so duur nie?

[LouisZ]

Dis reg, yoke word nie meer reg gemaak nie. Nuwe een word ingesit.

[Bliksempie]

Some feedback:

Replaced two U-Joints, Center Bearing, Output Shaft Bearing, Output Shaft Oil Seal, Diff Oil, Transfer Case Oil, Gearbox Oil and balancing of Prop-shaft. All at a cost of R2500. (The only outsourcing was the balancing part)

And some good advise which I read somewhere: To torque the nut on the flange, put it in 4L. It really works when you don't have a SST.

Everything runs smooth again.

[Mud Dog]

Good to hear!