Thread: Progress pics of the new 'Force 9' differential, it's getting there !

nice work dave

Dave, this is really exciting and I think that many may not understand the significance of your work here except for those that use, abuse and break things. I absolutely take my hat off to your work - something I think I may have read a snippet about on Pirate4x4 when talked about in conjunction with the different work that Keith (Revor) was doing in axle development.

As I understand how you've done it, the Hi9 bolts into a Rover housing and then add 35 spline axles and ends? Also what uni pattern does it take? What knuckles and CV's do you use and does the Hi9 also work for a rear application?

Dave, the more look at that the more I think wow!!!!

The 9" has a massive hypoid offset on it and the pinion has a huge support on the end of it to reduce flexing. The hemisphere is super braced also to prevent flex in the crownwheel. 35 spline axles is well into Dana60 territory. What is your expected failure point for it (which would take one absolute mumma of a force through it!) What size tyre would you expect it to run aswell - I'm sort of guessing something around 40-42" with a beating.

As always, looks / sounds awesome Dave!!

Great Work Dave , love it .Q: In your Design is there provisions made from end user to Lock both axles together.

Originally Posted by Slunnie

Dave, this is really exciting and I think that many may not understand the significance of your work here except for those that use, abuse and break things. I absolutely take my hat off to your work - something I think I may have read a snippet about on Pirate4x4 when talked about in conjunction with the different work that Keith (Revor) was doing in axle development.

As I understand how you've done it, the Hi9 bolts into a Rover housing and then add 35 spline axles and ends? Also what uni pattern does it take? What knuckles and CV's do you use and does the Hi9 also work for a rear application?

remove the swivel balls, replace with new fabricated open knuckles, fit MASSIVE Dana 60 heavy Duty CV's, fit new stub axles, bore existing hubs to take new bearings to fit the new stub axle bearings, drill and tap an extra 5 holes for the new 35 spline outer drive flange.

Yes it fit the rear, new diff, shafts, stubs, modify hub like above, new drive flanges.

Originally Posted by Slunnie

Dave, the more look at that the more I think wow!!!!

The 9" has a massive hypoid offset on it and the pinion has a huge support on the end of it to reduce flexing. The hemisphere is super braced also to prevent flex in the crownwheel. 35 spline axles is well into Dana60 territory. What is your expected failure point for it (which would take one absolute mumma of a force through it!) What size tyre would you expect it to run aswell - I'm sort of guessing something around 40-42" with a beating.

it's not shown on the prototype but the casing is also being made so it can be 'pegged' as well, maybe overkill seeing as you have the pinion end support bearing but as we are making the housing we may as well do it.

these will be on a par with heavy duty D60 axles, I think 40-42's will be fine all day, only 2 of these D60 HD CV's have ever broken and these were on a US rock crawler with 54's !

another application we are looking at is the 110 rear,

One of the reasons the Salisbury was dropped was the tubes came out the diff housing on very heavy 110's, the beam axle takes the weight better but the diff is obviously weaker and people are having problems with the TBB000270 / P38 diff. We are looking at making this 'Force 9' diff a bolt in replacement ie with the 24 spline shafts or you can upgrade the shafts Etc to 35 spline if required.

Thanks for your enthusiasm, we have spent alot of time and money on this already and are very excited by it.

Dave

Originally Posted by Disco_owner

Great Work Dave , love it .Q: In your Design is there provisions made from end user to Lock both axles together.

by axles do you mean what I would call the halfshafts ?

if so, it has an ARB locking diff,

Dave

Dave,

What is your target price on these units?