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4x4 cosworth rebuild front and rear diffs 3.9 £400 the pair

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Old Jan 28, 2015 | 10:26 AM
  #1  
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Default 4x4 cosworth rebuild front and rear diffs 3.9 £400 the pair

Im selling my pair of freshly rebuilt diffs.
3.9 ratios,

Just had a full overhaul, vapour blasted casings, new bearings, seals, spacers, shims, new crown wheel and pinion, strengthening plate in the front diff etc etc

Not done a mile, sat on the shelf £400 delivered the pair

Last edited by RIB1122; Jan 31, 2015 at 04:03 PM.
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Old Feb 14, 2015 | 04:30 PM
  #2  
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If you get a buyer on the rear I may be interested in the front one
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Old Feb 14, 2015 | 10:15 PM
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Can the ratio be changed on the front diff, i thought you had to step the gearbox to suit? normal front diffs are 3.6
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Old Feb 14, 2015 | 10:37 PM
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Originally Posted by c20tbo
Can the ratio be changed on the front diff, i thought you had to step the gearbox to suit? normal front diffs are 3.6
Only if you dont change the front diff you use a drop gear in the box which is the better option as the crown wheel in the front diff is the weak link
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Old Feb 15, 2015 | 04:59 PM
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3.9 diffs were used as standard in the DOHC 4x4 cars, physically a straight swap into a Sapph Cos 4x4.
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Old Feb 15, 2015 | 10:51 PM
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Does that make the 3.9 fron diff weaker than the 3.6 cosworth item?
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Old Feb 15, 2015 | 10:58 PM
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Yes thats right
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