Changing Cossie 4x4 Ratio to 3.9
22-05-2007, 04:17 PM
#1
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Changing Cossie 4x4 Ratio to 3.9
Keeping the standard ratio front diff and changing the rear diff CWP and using a step off gear set and shortened chain...
When fitting the step off gears does the transfer casing need any modding as I've had a few mixed reactions but I think it depends on the actual ratio you go for. Can anyone confirm whether the casing needs modding for the 3.9 step gears?
When fitting the step off gears does the transfer casing need any modding as I've had a few mixed reactions but I think it depends on the actual ratio you go for. Can anyone confirm whether the casing needs modding for the 3.9 step gears?
22-05-2007, 07:11 PM
#6
Originally Posted by Mike Rainbird
YES IT DOES, I have recently had mine done 
.
.i have a set of 3.9 drop gears here for sale, and the teeth counts are both less than the std 31/31, the 4.44 has a larger driven at 32 than std hence the case mods to the mid post to get the gear clearance ??
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22-05-2007, 09:14 PM
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3.9 definatly needs the casing modified.
it was done when i initially went 3.9, and then it was modded again after i killed that gearbox and bought a new one.
it was done when i initially went 3.9, and then it was modded again after i killed that gearbox and bought a new one.
23-05-2007, 08:30 AM
#11
Advanced PassionFord User
Originally Posted by Mike Rainbird
Originally Posted by Kelv
3.9 definatly needs the casing modified.
it was done when i initially went 3.9, and then it was modded again after i killed that gearbox and bought a new one.
it was done when i initially went 3.9, and then it was modded again after i killed that gearbox and bought a new one.
.
3.9, casing needs a bit of tickling with a die grinder.....
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