When you are building a Four Wheel Drive (4×4) Haynes Roadster, the engine will sit a long way behind the front differential. Therefore, there will need to be some pretty radical modifications to the standard sub.
There are not many Kit Cars with 4wd, I am starting to work out why. Hopefully, I have everything sorted now and this Rover V8 Haynes Roadster is 4×4.
There are many different Sierra rear drive shafts. Some are much longer than others but some that may be sold as one length may in fact be slightly different.
The Ford Sierra Front Differential is available in two ratios. 3.62:1 and 3.92:1.
Why have I chosen Granada 5 Stud 4×4 front hubs?
Fitting inboard shock absorbers and bell cranks to a Haynes Roadster has been a long process, mainly because Sierra Diffs now cost a fortune!
I’m not the first to mount a 4×4 front diff into a Haynes Roadster and at the speed I work at it’s not surprised. It’s not just a case of welding on some brackets there was a ton of calculations.
Haynes Roadsters can use some pretty old parts, that will turn up in rather rusty condition. These Granada rear hubs were cleaned up using electrolysis and the results even surprised me!
Fitting 4×4 to a Haynes Roadster cannot be easy. The Sierra front differential needs modifying and strengthening to suit it’s new position ahead of the engine.
For this Haynes Roadster build I’m going to use a Ford Sierra Front differential but the Cosworth sump will be thrown away. To regain some strength some new mounts will need to be designed and drawn.
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