I've had this idea of building something like a sand rail and using an ifs diff for the rear end, but since they are meant for the front I would be going backwards when trying to go forwards. So my question is what if I flipped it upside down? I know it then would be like a hi-pinion diff without the ability to lube itself, but could one drill and tap the new bottom and the area close to the pinion bearings and install a small pump to feed gear oil to the bearings?

 

Seems like it would be way too much work to make the front diff operational an live when something else is already made to do that same job. It would be much easier to find an IRS setup out of a mark III 86-92 supra if you wanted to go this route with toyota parts. You can take the whole sub frame, diff, arms, and axles as a complete unit.
But there are lots of other IRS setups out there that are just as strong if not more then the supra setup.

 

U are right, the only reason I was wondering is because I have the front diff from when I did a SAS

 

Putting a front diff in the rear will not make it run reverse. Turning it up side down will. Solid axle guys swap front and rear 3rd all the time.

 

Not rain on your party; but...... Sand rails are built on a Volkswagen chassis with air cooled engines. IFS is done for you. In fact I bet you can get one on ebay in tough shape so as to be perfect for that project.

 

Yea that's solid axle guys, I'm talking about taking a front ifs diff and making it a rear axle, and to make it turn the right way I would have to flip it uspide down.

 

I know that's why I said something like a sand rail, and the reason I'm thinking of a toyota ifs is because I have one laying around

 

No you wouldn't. A solid axle and IFS diff rotates the same direction. Flip it upside down and then it turns the other way. No need to flip it upside down.

 

O yea you are right, my brain was drawing blanks thinking it was backwards