Surf Diff Ratio Changes

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mike
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Surf Diff Ratio Changes

Post by mike »

Pulled the front diff out of the surf tonight. About 7 teeth have been milled off the crown wheel. Havnt had a chance to see what the cutter(pinion) is like as it was a bit dark in the shed. Will get some photos tomorrow night.

Next step is to dismantle the diff, measure the replacement parts and hope they will fit, wash the bearings out put the new ring gear in and attempt to setup the backlash correctly. Anyone got a spec around with the correct backlash settins? Front and rear would be nice :wink:

Old munted Crown wheel and pinion = 4.1 ratio. Replacements 4.3.ones

More updates tomorrow night

Mike
1973 SWB Land Rover V8 Hybrid
1994 Toyota Surf
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JJ
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Post by JJ »

Why don't you just get another complet front diff assembly from a wreckers. They are a dime a dozen & probably cheaper than rebuilding your old one.
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mike
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Post by mike »

Cant find one for less than $450. If you know of anywhere then do tell :wink: 94 front IFS diff.

Mike
1973 SWB Land Rover V8 Hybrid
1994 Toyota Surf
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eatenfuller
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Post by eatenfuller »

MIKE,where do you live :?: :?: :?:
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mike
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Post by mike »

at the moment in wellington. thats where the vehicle is.

Mike
1973 SWB Land Rover V8 Hybrid
1994 Toyota Surf
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eatenfuller
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Post by eatenfuller »

:roll: :roll: way up there :scratch:

try head autos in l/hutt, they should have one according to my cousin in wgtn.

ph 5865664 :wink:
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mike
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Post by mike »

cheers for the info gave them a ring and 550+gst. Might pass on that one. Would rather rebuild what i have as i have all the parts and will go lower ratio.

Mike
1973 SWB Land Rover V8 Hybrid
1994 Toyota Surf
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JJ
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Post by JJ »

I have an LN61 front diff 4.3 ratio which you can have for $150 & all you have to do is change over the HDD. I'm in Hastings 0274447734.
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eatenfuller
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Post by eatenfuller »

JJ the diff of mikes is totally different to youres (mike has the a.d.d locking system and a awesome system it is :!: ) :D
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1lurch
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bloody diffs

Post by 1lurch »

mike check with oldblue , he knows lots of these sort of things like this .
good luck and check twice tighten once :wink:

cheers AL
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oldblue
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Post by oldblue »

Sorry 1lurch, cant help with one.
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1lurch
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Post by 1lurch »

Anyone got a spec around with the correct backlash settins? Front and rear would be nice


thats the bit I thought you could help with , oldblue
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SupraLux
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Post by SupraLux »

There is an article here: http://www.4x4wire.com/toyota/tech/gear_setup/ which deals with the rear diff... not sure of the front settings tho...

Unfortunately most people just throw em away when they break, so it might be hard to find.

Steve
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JJ
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Post by JJ »

eatenfuller wrote:JJ the diff of mikes is totally different to youres (mike has the a.d.d locking system and a awesome system it is :!: ) :D

You might want to check but I think you can use an older style diff assembly and just change over the out put shaft & axle tube. Correct me if I'm wrong.
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pinky
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Post by pinky »

i have an 1988 front diff and axle assembly if anyone wants one $ 50.00 sounds good
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4runner
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Post by 4runner »

hello
im new so this mite sound silly changing the dif from 4to1 to 4to3 will make the surfs top speed greater is that rite?cheers
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mike
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Post by mike »

no it will make it lower for the same engine revs. If you then put bigger tyres on it will bring it back to normal again. If you put bigger tyres on without changing the diffs then your top speed will increase with the same engine revs. This is why people opt for 4.8 or 5.(something) when running 35" tyres. Your crawling speed is increased when putting larger tyres on and not changing your diff ratios from 4.1(normal for later surfs) to 4.8s or so

Mike
1973 SWB Land Rover V8 Hybrid
1994 Toyota Surf
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4runner
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Post by 4runner »

cheers mike thanks now i get it
if you still have it would you sell your old 4:1 diffs?
cheers
scott
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