I know series diffs bolt right up to a coiler housing so I guess the reverse is true. You would need to change the pinion flange though. Of course you would want to go to some kind of traction diff with the upgrade.

www.seriestrek.com

I have a friend with a set of his axles that he bought for a project he is mothballing for now, might save you a couple of bucks. Never installed, still in the box.

 

Thanks for the info Kevin... it's actually for Eric's truck... we have a few spare diffs around and he's considering upgrading the Series III ... I'll pass the info to him...

 

What is needed to convert a Series III 88" to 24spline axles? Will a differential from a D2 work in it?

Are you talking about switching the whole axle case, or do you want to put 24 spline drive flanges on the the one that you have..... It really is not that hard to upgrade to the 24 spline drive flanges.... (the diff sides of the half shafts are still 10 spline I believe.. and the other side is 24. ) I have a good amount of info on that conversion. Swithing axle cases...well no clue basically...

 

Are you talking about switching the whole axle case, or do you want to put 24 spline drive flanges on the the one that you have..... It really is not that hard to upgrade to the 24 spline drive flanges.... (the diff sides of the half shafts are still 10 spline I believe.. and the other side is 24. ) I have a good amount of info on that conversion. Swithing axle cases...well no clue basically...

Not the casing... but the third member & half shafts..

 

Keith from Rovertracks can make you some excellent 24 spline halfshafts also.

 

There are conversion kits for the diff (making it a 24 spline) that are basically drop in. On the rear axle the drive flanges need to be replaced wit h24 spline drive flanges. The front is a little trickier... depending on the shafts used, the stub axle may need to be changed to the post 1980 series III/stage I style and the bearing/seals changed and then you use the 24 spline drive flanges.

My truck has been changed to the 24 spline flanges, yet have the 10 spline on the diff side. I looked into switching the diff side a a couple of years ago, but after doing the research decided against it. Even after going to 24 spline on both ends, the complaints I saw were still broken half shafts. It is very rare to hear of someone ruining the diff side of the shaft. Also I am lucky to have a Salsbury rear end... I have seen several 10 slpine drive flanges strip out. I will try and find the 24 spline diff website. I believe that they are actually a Toyota product.

 

It is very rare to hear of someone ruining the diff side of the shaft. Also I am lucky to have a Salsbury rear end... I have seen several 10 slpine drive flanges strip out. I will try and find the 24 spline diff website. I believe that they are actually a Toyota product.

Guess I'm hard on my truck.:wave: I've broken both sides of the front shaft.

 

SHould have worded that differently.... it is rare to hear of someone blowing the diff at the half shafts.... the shafts commonly break closer to the diff, but usually not doing any damage to the diff's. If you blow a diff, usually it is not wear the shafts attach, but in the main gearing....