Rear Diff (local humming noise)

Discuss modifications on your 1979 to late 1998 SFA 4x4 Hilux here.
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minwaz
High Range 2WD
High Range 2WD
Posts: 13
Joined: Thu May 18, 2017 10:18 pm
Town: Howick
Vehicle: fortuner
Real Name: minesh

Wed Dec 05, 2018 4:23 am

Good day has anyone experienced the noise I belive that I would have to change the bearings on the diff ( has slight whip lash) and further to change the crown wheel and Pinion. I belive I can the crown wheel from commercial auto not sure if that's the best option or to get a good second hand or recon unit ( centre Portion)
Please advise..

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Mud Dog
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Posts: 28851
Joined: Tue Apr 29, 2008 2:18 am
Town: East London
Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
Real Name: Andy
Club VHF Licence: HC103

Wed Dec 05, 2018 5:45 am

What is the mileage on the vehicle?
When your road comes to an end ...... you need a HILUX!.

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Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
minwaz
High Range 2WD
High Range 2WD
Posts: 13
Joined: Thu May 18, 2017 10:18 pm
Town: Howick
Vehicle: fortuner
Real Name: minesh

Wed Dec 05, 2018 7:41 am

Good morning it's very hard to tell as when I bought vehicle the spedo was not working ..

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Mud Dog
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Posts: 28851
Joined: Tue Apr 29, 2008 2:18 am
Town: East London
Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
Real Name: Andy
Club VHF Licence: HC103

Wed Dec 05, 2018 8:33 am

If you're certain that it's the diff and not the rear wheel bearings I'm thinking that your best bet is going to be to fit a reconditioned 3rd member on exchange at a reputable gearbox & diff centre.
The fact that there's a back-lash is already a bad indicator. If the sound you hear is indeed from the diff and is more of a hum than a whine I would tend to agree with you that there's a bearing problem. If it's whining, it's more probably crown & pinion.

Either way, if it's the diff, it's not going to be a cheap repair and I would go the re-con route for peace of mind. Maybe first take it to a few diff centres to have it checked out and see what they say and get quotes at the same time.
When your road comes to an end ...... you need a HILUX!.

Image
Image

Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
minwaz
High Range 2WD
High Range 2WD
Posts: 13
Joined: Thu May 18, 2017 10:18 pm
Town: Howick
Vehicle: fortuner
Real Name: minesh

Wed Dec 05, 2018 8:43 am

Thanks a million for your advice when I built up the vehicle I replaced all the wheel bearings front and back and while the diff was out replaced with new oil ..
Once again thanks for your assistance
Regards Min

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Scott
LR 4WD Rear Locker
LR 4WD Rear Locker
Posts: 379
Joined: Wed Oct 19, 2011 8:00 am
Town: Benoni
Vehicle: Hilux SFA
Real Name: Rodney

Thu Dec 06, 2018 1:38 pm

on smooth tar weave the vehicle side to side and listen for change in pitch also jack back wheels and feel for play
roshmin
Newbie
Posts: 3
Joined: Tue Sep 25, 2018 9:31 pm
Town: Howick West
Vehicle: Hilux Sfa
Real Name: Minesh
Club VHF Licence: no

Thu Dec 06, 2018 1:57 pm

Hello Scott thanks for the above when I jacked up the vehicle when I rotate there is play when I engage reverse or driving forward I feel little clicking noise as u about to pull off ..i have driven arroun 60 km the humm is evident ...as I drive arround 120km it gets a bit louder..
Scott
LR 4WD Rear Locker
LR 4WD Rear Locker
Posts: 379
Joined: Wed Oct 19, 2011 8:00 am
Town: Benoni
Vehicle: Hilux SFA
Real Name: Rodney

Fri Dec 07, 2018 8:24 am

rather safe than sorry i guess that it is a gearmax diff take it too a few different places to get quotes or their opinion
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Mud Dog
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Posts: 28851
Joined: Tue Apr 29, 2008 2:18 am
Town: East London
Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
Real Name: Andy
Club VHF Licence: HC103

Fri Dec 07, 2018 8:36 am

No Rodney, it uses a 3rd member, so it will be the Jap imported diff. :winkx:
When your road comes to an end ...... you need a HILUX!.

Image
Image

Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
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