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How to use a evo 1,2 iron head transfer case in your vr4 gearbox

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#1
Mirage-cyborg

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So you have a 22 spline output shaft on your vr4 gearbox? You want have the much stronger 23 spline iron head transfer case?

 

It's really easy to do - if you've got the mechanical skill to change a flat tire you should be able to manage this! 

What you need to do is: unbolt the end casing of the gearbox (you can even do it with the 'box still in the car) remove the circlip that holds the viscous unit (big round thing) on, then pull the viscous unit off - catch the ball bearing that holds the shaft in place, then you can simply push the shaft inwards, and remove it from the other end of the gearbox (there's just enough room before it hits the sump) then take the shaft from your old vr4 box and slide it into place from the same side (engine side of gearbox), once it's in place, fit the ball bearing into place and push the viscous unit back on, refit the circlip, then apply a bead of sealant around the end casing and bolt it back into place.

 

 

I personally have not done this yet but will be giving it a go soon and i will update you how i go.

 

IV noticed that my transfer case has the 23 spline steal head on the old alloy body of the transfer case.

This is on my c83a cyborg.



#2
bazeng

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Good write up.

I'll be doing mine shortly..

#3
Mirage-cyborg

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10632800_10153917831691850_7333434746571

 

Remove this cir-clip and pull that bearing off

15032739_10153917831651850_8798202203228

 

and this will slide right out

15027480_10153917831601850_4053721137385

 

Watch out for the little locator ball bearing that will fall out from the transfer case side..



#4
evo-gsr

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Better known as the "detent ball " ^ its approx 8mm in size and if its not in place the output shaft can move back and forth and will leak from the seal
[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]

#5
evo-gsr

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Also...thats not a "bearing" its the viscous coupling. FYI
[qoute name="BMGTZ" post="331212" timestamp="1467451744"]I don't know anything ...
Trust in the master of taxis.... He will set you straight[/quote]


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