front diff drop kits - anyone had experience?

Itsbrung
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Joined: February 25th, 2013, 6:28 pm

front diff drop kits - anyone had experience?

Unread post by Itsbrung » April 18th, 2019, 5:15 pm

hi guys has anybody had experience with these front diff drop kits, looking at a formula 2 inch lift for 2012 dual cab bt with rear with drive shaft spacer and wondering if these front are worth the money. some on ebay $120 TO $600. Advice would be greatly appreciated.

Peter Aawen
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Re: front diff drop kits - anyone had experience?

Unread post by Peter Aawen » May 2nd, 2019, 5:09 pm

The thing you need to realise about IFS suspension & many of the so called 'lift kits' or 'flip kits' out there for them is that unless you are physically changing the front swinging arm lengths or moving the pivot points for those arms, you aren't really changing the total suspension travel available as allowed by that suspension design. The absolute best outcome you can expect from those basic kits is that you might change the static ride height a little bit without pushing the driveline to operate at dangerous angles - ie, the vehicle might sit & ride just a little higher than before (no more than about 40mm or so) if the lift hasn't compromised the driveline angles. However, because these things don't change the total suspension travel & now the new static ride height is going to be that much closer to one of the fixed ends of the fixed travel range, if you've gone for too much lift you might even have less usable travel than when the vehicle was sitting at stock height! And doing anything more than a mild lift that way usually means you will also be pushing the drive shaft &/or cv's to operate at extreme & largely un-sustainable angles, or if you like, not only are you running closer to one of the hard stops for travel, but now the fragile rotating bits of the suspension/drive line are already operating well towards the 'busted soon' end of their overall operational range - ie, it is now even closer to at least one of its fail points than it was when stock! :eek:

One of the few ways you can properly return those angles to stock levels &/or reduce the extreme angles & therefore reduce the risk of breakage will be to use something like a diff drop kit! And the better quality diff drop kits usually not only drop the diff to bring the angles of operation for those fragile turning bits of the driveline back into the safe area around the middle of their operating ranges, they also sometimes even include the necessary bracketry & componentry etc that really does allow you to move the pivot points &/or change the length of the various arms so that it might even mean you DO get some improvements in the total suspension travel available! If you can find a diff drop kit that includes moving the swinging arm pivot points along with dropping the diff AND one that includes longer arms or maybe a different shaped/length spindle, then you might even get all of that lift you're chasing as well as reducing the risk of breaking axles &/or CV's AND you can also improve the total suspension travel range available. But for most, that won't happen unless the diff is dropped! :thumb:
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Itsbrung
Here and there
Posts: 22
Joined: February 25th, 2013, 6:28 pm

Re: front diff drop kits - anyone had experience?

Unread post by Itsbrung » May 3rd, 2019, 3:26 pm

Thanks Peter, great info, I also wrote one of those blank cheques many years ago, no regrets.

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