Sierra chain drive differential
Sierra 7" LSD chain drive conversions

Order Ref: Sierra Kit2:
Complete Sierra 7" LSD
chain drive differential assembly
Price: £call
No longer available - See conversion Kit3 below if you can supply your own differential.

Order Ref: Sierra Kit3
Conversion Kit for Sierra 7" LSD
chain drive differential
Price: £399
Availability: Appoximately 3 weeks from receipt of your Sierra 7" LSD

For Ordering & Payment Details click here
Prices do not include delivery
We are not registered for VAT.

Sierra Kit2 comprises:
Modified Ford Sierra 7" Viscous LSD with output shafts (Lobro 86mm pcd type)
Differential housing machined to install sprocket on left hand face of flange
(2) Aluminium Alloy Bearing Carriers with oil seals
(2) Sealed Roller Bearings
Aluminium Alloy Oil/grease Can
Aluminium Alloy Sprocket (Choice of size up to 530 pitch, 51 tooth)
[52 to 60 tooth sprocket £5 extra]
Includes sprocket fixings and bearing carrier fixings
Installation CD

Sierra Kit3 comprises:
Machining of your own Ford Sierra 7" LSD
Differential housing machined to install sprocket on left hand face of flange
(2) Aluminium Alloy Bearing Carriers with oil seals
(2) Sealed Roller Bearings
Aluminium Alloy Oil/grease Can
Aluminium Alloy Sprocket (Choice of size up to 530 pitch, 51 tooth)
[52 to 60 tooth sprocket £5 extra]
Includes sprocket fixings and bearing carrier fixings
Installation CD

This limited slip differential is ideal for use on mid engined racing cars, Formula Student, kit cars, quads, trikes or buggies which use chain drive bike engines.
Click HERE to download brochure for chain drive for Formula Student teams (2Mb .pdf file)
The differential is a Ford Sierra (Cosworth XR4x4) 7" viscous type lsd and comes complete with output shafts to suit 'lobro' 86mm pcd type CV couplings.
The kit utilises side mounted bearing carriers which allow for easy chain tensioning by sliding the carriers fore-and-aft on slotted holes in the chassis.
The differential is designed to mount between longitudinal chassis rails set 180mm apart.
Shims are supplied to allow positioning of the rear sprocket with the gearbox sprocket.
Alternative mounting arrangements can be custom made (at extra cost).

single disc
Optional Pivot Carrier with single rear Disc and Calliper

Left side sprocket

Optional Pivot Carrier, with sprocket mounted on left face of flange.

We can supply any of the above parts individually and we can modify your own Sierra 7" LSD to accept the sealed bearings and oil can.
We can also supply a chain drive version of the "open" Sierra differential if you do not need an lsd.

Additional Aluminium Alloy Sprockets (to suit above)
From £55 (Delivery approx. 2 weeks)

Typical sprocket
Click here for sprocket size calculators for common bike engines


Specify chain size/pitch and number of teeth when ordering
For Quotation & Payment Details click here

Custom Driveshafts
From £190 each (Delivery approx. 4-6 weeks)

Custom driveshafts
To suit inboard & outboard CV joints for your application.
For Quotation & Payment Details click here

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