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Author: Subject: Sierra to freelander diff...
G.Man

posted on 29/1/07 at 12:52 PM Reply With Quote
Sierra to freelander diff...

What is the work involved in switching from a sierra diff to a freelander diff?

Is it like a major job? chassis welding etc? new uprights? brakes?

Have a chance of one cheap here in cyprus...







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the_fbi

posted on 29/1/07 at 01:29 PM Reply With Quote
I'm not sure if they are all suitable ratios, or if there is a choice.
All the ones on eBay have appeared to be 4.xx, but Westfield use them so they can't be that high, else you'd be on the limiter at 70.

Westfield do a pair of brackets which replicate the standard Sierra diff mounts, they are about £30 a piece (I've posted an accurate price and picture before).

What you need to watch out for is that a longer prop is required, as the input flange isn't as "long" (far forward).

Edit:
http://www.megablade.co.uk/images/freelanderdiffmount2.gif

Righthand bracket for the diff is £34.60, Lefthand is £18.38.


[Edited on 29/1/07 by the_fbi]

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G.Man

posted on 29/1/07 at 02:58 PM Reply With Quote
Thanks Guys

Will check ratio and may grab it if its okay, trying to lose some weight, as I may have a hill climb next month...

Will have to fit LSD to it as well







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JoelP

posted on 29/1/07 at 09:57 PM Reply With Quote
all ratios are 3.21 as far as i know, and they dont have lsd as a factory option. Would need quaiffe etc.

Main difference between sierra and freelander is that sierra has the bolt holes in front of the drive shafts, whereas the freelander has the bolts behind the shafts. Makes the attachment a little harder. I wouldnt just weld in a big plate to hold it, thats a poor solution and defeats part of the 7kgs weight saving. On mine, the diff carrier is triangular, and when finished, the rear bones will mount onto this (cunningly designed so that all the points fall onto a single pair of triangles). Total rear end involves about 45 inches of square tubing, and no plate.

with custom driveshafts, you wont need to change uprights or brakes at all. Get the light shafts whilst you're at it!

[Edited on 29/1/07 by JoelP]

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