Kit Car 4wd Front Differential

Fitting the front diff has been one of the hardest parts of this build so far.

The Rover V8 is not a huge engine but still finding room has been tricky.

Changing the front timing chain cover has proved very successful. The differential has been angled forward by 5°.

The Rover V8 Serpentine front cover has a internal oil pump and this allows room for the front prop UJ. There is even room for the standard oil filter. I was expecting to need a remote oil filter but with just a small re-shuffle, I am a very happy boy!

The cantilever DRZ400 pull rod and bell crank front suspension fits – IT ALL FITS!☺

The prop-shaft will be a special, made from a thin xr4x4 prop joined to a custom front end and transit central bearing.

So much so, this weekend I’m am going to make some brackets and get the real diff mounted.

I am using a rare Sierra 2.0 4×4 front diff with a 3.91:1 ratio, but I have a couple of spare 3.62:1 for mocking up purposes.

Published: 12th November 2011

Kit Car 4x4

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Sierra Front Differential Part II

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Unlike the Rear Sierra Differential, the front differential is not located along the vehicles' centre-line. The prop-shaft driving the front diff exits the side of the MT75 gearbox and travels forward to the front differential bolted to the side of the sump. The front differential mounts only to the engine's ...

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Sierra 4x4 Front Driveshaft Cover

This Sierra 4x4 Front Driveshaft Cover forms part of the Cosworth front axle assembly normally bolts to the nearside of the sump. In this design however, it will be mounted to a custom axle assembly. The cover would normally bolt to the right hand side of the sump / shaft assembly ...

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I've started to mock up the front 4x4 system. In CAD everything looked extremely tight. I spent ages moving components back and forth to get everything to fit. So far, in the mock up. There looks like bags of room. When I say 'bags' I mean a good 6-7mm! ...

Seventh Heaven

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