Hey guys, a few weeks ago I ran into a guy at a ford show and got to talking about gearing of our trucks..one thing lead to another and we ended up swapping rear ends.. he said he had a 3.08 ?? ( did they make these for 9" ) and I had a 3.70 as he needed the lower gear for his overdrive f100 and I needed the higher gear for my c6 5.0 HO f100.. made good on the deal today.. and upon seeing it I noticed it was quite a bit beefier than my 65s ( former 240 6 cylinder ) rear end... the casing is a little thicker, the pinion support is different .. has the hood over the yoke, the yoke is noticeably thicker and longer by a small bit. he called it a daytona center section ( i think he is referring to the pinion support?) and thought it was a later model N type case ( not sure about that) .. its a 67 casting.. dunno.. anyway I got it.. I have been looking around the web.. but not a lot of good info. Any of you guys know what it is? .. best I can tell it maybe came out of an FE powered car in 67 or early 68 . .it is the same (31? spline) as my truck.. he had it installed in a 66 f100.
Ford made different yokes, hope it fits yours. I doubt it's the Daytona pinion support...which has a larger inner bearing. Look for Kevin's 9" ford page
Thanks.. I checked them out... kinda hard to really tell from there what I have.. I did see down on their page about the daytona.. and I can see why he would say it is a daytona it looks a lot like it.
well.. yokes on me.. the yoke is bigger.. not horrible thing.. my driveshaft was going to be redone anyway... ( muffler shop installed a muffler mount too close and when the suspension flexes it rubs ).. and it has worn a nice spot on the shaft.. so.. on to the next step. I'm going to show my ignorance.. i ***ume there is not a u joint that will fit.
Could you guys have not swapped yokes too? He's gonna run into the same problem as you, I would think
That is NOT an "N" case, just a standard run of the mill 9" C7AW-E type The pinion support looks like the basic D2AE-A with guard. Nothing special there either
You can buy a joint that is 3.25" one direction with 1.1/16" diameter cups and 3.625" wide with 1.1/8" cups the other way. Might be the solution for you.
sorry to say but it sounds like he knew you had what he wanted and then sold you abill of goods to get it from you
Just hope this isn't one of those infamous 9 3/8" Eaton (?) rears that came in some T-Birds and Mark's in the 70's... looks the same as a 9" but it ain't.
http://www.kevinstang.com/Ninecase.htm This is a pretty cool page. Lots of great info on 9" rearends.
Like Marty said, there are various u joints available that will go from your existing driveshaft to the new yoke. Just tell the driveline shop that is going to make up your driveshaft the dimensions of the new yoke and how the new yoke holds it in place and they can fix you up. The thing you really need to be sure of first is if it has the same number of splines as your old one on the axles. That could be a deal breaker. As far as finding out the gear ratio, look on the backside of the ring gear, there are some numbers there usuallly and you will see something like 9 then 34 (just as an example). That gives you the number of teeth on the pinion and the ring gear. Divide the lower number into the higher number and that is your ratio. ( 10 and 41 would be a 4.10 ratio ) Don
Funny how all used old Small Block Chevrolets are always from a Corvette, now Ford 9" chunks are all Daytona's LOL. Sorry, as already stated its not a Daytona Pinion Support, nor is it a N or Nodular iron case. TR
If you are mating to a small #1310 U-joint, Speedy Bill has the yoke, U-joints, and the U-bolts. Part #802-92417 for the yoke, this for the standard 28 spline pinion gear. The 1310 U-joint will have the 1 1/16" caps as well as a 3 7/32" spread. TR
I refer to this site for 9" info at times... http://www.maliburacing.com/ford_9_inch/ford_nine_inch.htm
ok i thought i knew pretty much about evything on a 9" but what is this daytona support you guys are talking about ? my guess is something nascar boys used to use and appearently ive never seen before could someone post apic of one?
The daytona has a much bigger inner bearing, and extra internal ribbing. Usually used on the nodular centers. There isn't much to see. The Daytona has a smooth circular ring where the bolt holes are. The regular support has raised bumps under each bolt. Casting number is the best way to tell. Mine is a C5AW-4668-C. There is also a D2OW-4668-C hooded version. Edit: To the OP, I took another look at your pic, and it appears to be a smooth front on the pinion support. Do a search on the casting number to see if it's a Daytona.
I never re-use pinion nuts. I always use a fresh one, when re-gearing, or just swapping a yoke. They are self-locking, and sometimes don't lock well after being re-used. Something to consider.
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