9" Axle ID please
This is the tag to the best of my abiliy to read it. Kinda amazing that it was still there 40 yrs later.
RJC C1"C" 9GC
2 7.59 9"?" 16A
Stuff in quotes is either illegible or a good guess. I checked the axle decoder but that was a funky mess.
If its an LS dif it would be sweet. A plain 9" is cool to as I want a more streetable gear in my 64F100 4.11 is to damn low for a pickup that will never haul more then 1500lbs.
This is the tag to the best of my abiliy to read it. Kinda amazing that it was still there 40 yrs later.
RJC C1"C" 9GC
2 7.59 9"?" 16A
Stuff in quotes is either illegible or a good guess. I checked the axle decoder but that was a funky mess.
If its an LS dif it would be sweet. A plain 9" is cool to as I want a more streetable gear in my 64F100 4.11 is to damn low for a pickup that will never haul more then 1500lbs.
No axle tag code begins with the letter R. There is no J code as the second digit of the prefix. The highest second letter is G.
All Ford 6 3/4" / 7 1/4" / 8" / 8.7" / 9" / 9 3/8" axle tags begin with the letter W.
I looked, there is no W J C.
There are over 600 different axle codes for 1965/72 Ford passenger cars. I looked thru pages upon pages looking for possible codes that have W ? C, then suffixes of C, C1.
Couldn't find a match...better take another look-see at that tag...try looking on the reverse side.
2 7.59 should be: 2.79 (2.79-1). While it could be 2L79 if it has Limited Slip, that is not always the case on vehicles of this vintage.
Some 9's have a separate tag with just the letter L on it. L = Limited Slip.
9GC = Assembled the 3rd week (C) of July (G), 1969 (9).
Even if the code was correct, trucks use different axle code suffixes than cars do, so...the FTE decoders will not work.
The carrier (pumpkin) of 9 3/8" rear axles has one of the ends of the upper re-inforcements tailing off towards the drivers side, not straight across like 9's do.
I think I'll have to pull the carier out and count the teeth to be 100% sure of what I got.
This is the tag to the best of my abiliy to read it. Kinda amazing that it was still there 40 yrs later.
RJC C1"C" 9GC
2 7.59 9"?" 16A
Stuff in quotes is either illegible or a good guess. I checked the axle decoder but that was a funky mess.
If its an LS dif it would be sweet. A plain 9" is cool to as I want a more streetable gear in my 64F100 4.11 is to damn low for a pickup that will never haul more then 1500lbs.
flipklos
Here is some info that may help now and in the future, its real useful when dealing with
the ( 9" and the 9 3/8 . )
Link>>>>>>
Kevinstang's Ford Nine Inch Differential Page +
Link.>>>>>>>>>>>>>>
http://www.maliburacing.com/ford_9_i..._nine_inch.htm
Wally Womack
Last edited by Pro-Street/StateTK; May 23, 2009 at 11:45 AM. Reason: watching my Ps and Qs
There are exactly six parts that are the same 9 3/8" vs 9"
Two pinion bearings and one race, the housing gasket, pinion seal, the lock ring for the pilot bearing.
Everything else is different...including the axleshafts, axle bearings and seals. 9 3/8" parts are hard to find.
Heres a link to some good info. on the 9 3/8 rear end there is a real good ( Photo ) that
will help with ( I.D.) , also bill has posted some places that sill has parts !
Link>>>>>>>>>>>
https://www.ford-trucks.com/forums/8...e-carrier.html
Wally Womack
All Lincoln: Town Car, Mark III & Mark IV / Some Thunderbirds, Galaxie/LTD's & Mercury Marquis.
1968/72 F100. The 9 3/8" was an option over the 9 inch, but was standard equipment on F100 Camper Specials.
1968/72 F100: The 9" had a axle capacity of 3300 lbs. The 9 3/8" had an axle capacity of 3600 lbs.
9 3/8" = 31 splined axleshafts.
Trending Topics
I have a 9 3/8 2.75 case out of a merc grand marquis wagon in my 64. others here on the forum also have them in their nine inch housings.
Garbz
Ford Trucks for Ford Truck Enthusiasts
I got a non locking 2.75 ratio 9" with 28 splines on the shafts.
Will this bolt up to my original 64 housing? Id like to set up a 3.70 gear with a limited slip in it. Also is the OEM type tracloc differential still available? Or do I have to use a aftermarket?
Giving advice to others inre to mods is not something I do....unless I have done it myself or seen it done at the dealership..so I know that it works.
When I came here in the 90s we just started swapping I-beams for disc brake upgrades. You would have murdered us, because as you stated, no dealership was doing it, and still don't.
Some cat wrote that miserably flawed article that the site management embraced about what year parts will swap and others that wont, and is still around.
If a part will work, it will work.
John
When I came here in the 90s we just started swapping I-beams for disc brake upgrades. You would have murdered us, because as you stated, no dealership was doing it, and still don't.
Some cat wrote that miserably flawed article that the site management embraced about what year parts will swap and others that wont, and is still around.
If a part will work, it will work. John

I personally have no experience, or have never seen a 9 3/8" carrier installed into a 9" housing.
Prior to yesterday, I've read exactly one post on this topic. I'm not giving out the info based on that one post.
If you and Dave (Garbz2) say it will work...OK.
I've met Dave, and I know he knows his stuff...he has far more practical experience than I ever had...or will.







