My Dana70

 Ah yes.....finally time for a real axle.  I guess the hundreds of hours I spend on this website helping folks for nothin' really does pay off in karma.  Because, unbelievably...I found a FFD70 rear end abandoned and rusting in the woods, and just begging to be salvaged.  Who am I to refuse? Besides, I always pick up all the trash I see......it's good for the environment!

Dcp_4088.jpg (54258 bytes) Clearly it had been there for some time, and nobody was planning on coming back for it.  The earth had completely filled in around the wheels, over 8" deep!
Dcp_4177.jpg (45469 bytes) Here it is rescued and at home.  It measures 65" wms to wms.  Note how it completely dwarfs my FFD60 rear from my old '79 F250.
Dcp_4178.jpg (39453 bytes) Huge drums and big meaty full-float hubs!  
Dcp_4144.jpg (38338 bytes) 10.5" dia. ring gear and 4.56 (41/9) gears.
Dcp_4173.jpg (44873 bytes) And a 2-piece open carrier that is very large and strong. Reader tarussell writes: "The model 70 used a few different open carriers - some one-piece (like a Dana 60) and some two-piece (similar to a P/L). The P/L has angled ramps at the cross pin in each side of the case halves; has the innards of the L/S spiders & clutches and centring rings, and the bolts that hold the case halves together are at the end of the case instead at the low point of the casting crown like the open carrier.
Dcp_4174.jpg (40873 bytes) There are some numbers cast into the webs, but none appear to be BOM numbers.  Clockwise from the driver's top web, the numbers are:

1868818

030783

70

2018188
Dcp_4175.jpg (40249 bytes) The ring gear has some little chips, but they don't appear to be critical, and I may well trim them off if I shave the diff enough to require taking a little off the ring gear.
Dcp_4154.jpg (28503 bytes) The Shafts are 35.5" long, 1.5" dia., 23-spline, equal lengths.

They may not be 35-spline, but look how they dwarf the FFD60 30-spline axle on the right.

Dcp_4168.jpg (19573 bytes) The D70 shaft is much beefier at the flange end too, D60 on the left.
Dcp_4171.jpg (38688 bytes) Overall the 23-spline 1.5" shafts appear much bigger and stronger than the common 30-spline D60 shafts.
Dcp_4159.jpg (33189 bytes) The tubes themselves are monstrous.  They measure at 3.562" dia.!!
Dcp_4151.jpg (37001 bytes) They do a little taper at the end though. This differs from my D60 tubes which are smaller, but do not taper at all.
Dcp_4161.jpg (30804 bytes) Centre of the tube to bottom of uncut diff measures about 6.5", about .5 to .75" more than a 60.  I will likely shave it dramatically.
Dcp_4179.jpg (38065 bytes) I don't yet know what size that nut is, but freakin' huge is a good start.  This side had studs for the axle flange, the other side had bolts...and 3 different sizes at that (I hoped at least all the threads were the same, and just the heads were different!)
Dcp_4181.jpg (33900 bytes) For giggles, I slid in a D60 shaft, and interestingly.....
Dcp_4180.jpg (32617 bytes) ....the axle flange bolt pattern is exactly the same.
Dcp_4241.jpg (72107 bytes) D60 on the left, D70 on the right.
Dcp_4240.jpg (80652 bytes) D60 on the bottom, D70 on the top.
Dcp_4239.jpg (59277 bytes) D60 spindle ID 1.407".
Dcp_4238.jpg (81599 bytes) D60 spindle OD 1.984" - SAME AS D70 spindle!!
Dcp_4237.jpg (57890 bytes) D70 Spindle OD 1.957".

I guess boring out your D60 spindles for 1.5" shafts is no big deal, as it appears the stock D70 spindle is thinner wall than the stock D60.

Dcp_4236.jpg (49225 bytes) D70 spindle ID 1.630".

 


Get a GoStats hit counter

HOME