Originally Posted by martin-reyland
Originally Posted by a.k.a
An alternative to changing the step offs in the box is to use the front 3.9 diff from a 2 litre DOHC 4x4
As long as you match the diffs front and rear you dont need to touch the box
People say its not a strong front diff but then again neither is the 3.6 cosworth version
the 3.9 front diff is known for being very weak hence the use of the standard ratio front diff and step off gears
yes I agree for high power/heavy footed applications, but for people using standard 4x4 boxes they are a cheap and readily available alternative - I know of quite a few people running both front and rear sets of 3.9 diffs from the 2 litre dohc in 4x4 cosworths with moderate power increases who have had no problem with them, and if they do go they are easy and cheap to replace.
edited
meant to also say a lot of the problems are caused when people do not use the 2 proper extra mounting brackets that only came with the cosworth front diff when they use the 3.9 front diff which then allows the casing to flex and crack