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85 4runner rear diff

Tech Talk for Cruiser owners.

Moderators: toaddog, Elmo, DUDELUX

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Posts: 61
Joined: Tue May 15, 2007 6:57 pm
Location: canberra

85 4runner rear diff

Post by Valkyrie »

hey all
my diff is starting to whire alot
and from previous experience this means only one thing
haha rebuild time


now should i go get the normal gears put in or should i put out abit mroe money for something abit stronger/better suited for wheelin?
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Posts: 241
Joined: Sat Dec 15, 2007 8:25 am
Location: Gold Coast

Post by a1 mech »

Hav u isolated that it is not a wheel bearing? Standard crown/pinion if in good condition r strong enough for most conditions. U can get cryo/heat treated sets from the states if u really feel u need more strength.
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Posts: 61
Joined: Tue May 15, 2007 6:57 pm
Location: canberra

Post by Valkyrie »

hhmm no i havent and thanks for pointing that out


i just assumed it was the diff as my last 4runner did the same thing b4 it started really vibrating


onyl starts whirring after about 60k and just gets louder as i go faster.
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Posts: 241
Joined: Sat Dec 15, 2007 8:25 am
Location: Gold Coast

Post by a1 mech »

Sounds like it cud be either a wheel bearing or pinion bearing. I wud jack the back off the ground and check wheels for excessive play (spin the wheels in the air also and feel if the rotations r notchy or restrictive to c if its the diff). Also push up and down on the pinion flange and c if ther is any movement ther, Ther shud be none. Cheers
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Posts: 61
Joined: Tue May 15, 2007 6:57 pm
Location: canberra

Post by Valkyrie »

cool cheers bud will ahve a go at it tommoro
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Posts: 33
Joined: Thu Jan 10, 2008 2:42 pm
Location: Canberra

Post by a-frame81 »

If you decide to do the diff centre I have a spare one with standard ratio that I'm not using anymore. Did you have the petrol or diesel runner?

If the 2L diesel I would suggest changing to 4.88 or similar to run the 33's you want to.

Cheers.
'84 4runner, 33's, 2"lift, rear detroit, diesel gas enhancement
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Posts: 61
Joined: Tue May 15, 2007 6:57 pm
Location: canberra

Post by Valkyrie »

a-frame81 wrote:If you decide to do the diff centre I have a spare one with standard ratio that I'm not using anymore. Did you have the petrol or diesel runner?

If the 2L diesel I would suggest changing to 4.88 or similar to run the 33's you want to.

Cheers.
hey bud nah its the petrol
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