Ford 9 Inch Quick Change!

FIA-ERA · #1 (**permalink**) 07-08-2009, 09:31 PM

Alright guys and girls have you ever seen one of these before? I will attempt to post a picture. I found this at a shop and it's just a really neat piece! I have never seen one before and thought at first it was a "jimmied" up part but it was designed for this rear end. Any info. on it would be great. I did put it up on ebay(# 170355593536) as I really don't have any use for it. Plus my wife wasn't to keen on putting it on display (coffee table). Thanks, Matt.

csx wnab · #2 (**permalink**) 07-08-2009, 09:44 PM

i would be willing to bet that it is for a landspeed car. the main carrier looks like it has a spool.and since changing the gears in the overdrive housing is a pain- remove driveshaft-, i would'nt concider this a quickchange rearend, how many teeth on ring&pinion?

FIA-ERA · #3 (**permalink**) 07-08-2009, 09:53 PM

I agree its still pretty involved to change the gears! It has the standard 10 spline as most quickchange rears have (Franklin, Speedway, etc.) It is still easier to change out for some given the weight of a typical 9 inch. But, this piece weighs a crap load! Try 120 pounds!! It has 37/ 10 on the ring/ pinion gears. It would be great mounted to a aluminum case too. It also, oddly enough, has an open diff? The past owner past away so I have no info. on this rear. Thanks, Matt.

427sharpe · #4 (**permalink**) 07-08-2009, 10:02 PM

That looks like one of the old differential mounted overdrive units. This one seems like it comes off of a HD truck, judging by the size. I used to have a '65 Galaxie ex-cop car that had a vacuum controlled OD mounted to the 9" that was much smaller, something like this:
http://www.stangerssite.com/honeodrive.html
The one on the Galaxie was fun..could engage from any of the gears for a 20% overdrive, so you theoretically had an 8 speed toploader, just remember to clutch before engaging or disengaging the OD.

trularin · #5 (**permalink**) 07-09-2009, 05:33 AM

Sort of looks like an old OD unit that was third party produced back in the late 80s into the early 90s. Sold for something like $2000 and it was bolted to the rear axle on GM and Ford.

I wish I could remember more, but it was a slick idea back then, just too expensive for someone with two kids, mortgage and all those other expenses.

Tom Wells · #6 (**permalink**) 07-09-2009, 08:32 AM

Iffffff you really have to have one......

http://www.cwiinc.com/quickchangeaxles.htm

Tom

vettestr · #7 (**permalink**) 07-09-2009, 08:46 AM

The monster you found is a gear splitter. Think of a truck/tractor that can select each gear in the tranny and then have a hi - low selection at the rear diff. although photos don't show a solenoid or way too shift or select.

Gear Vendors was one of the popular suppliers or this type of goodies. IA photo showing what is cast into the front cover would help.

FIA-ERA · #8 (**permalink**) 07-09-2009, 11:03 AM

Thanks for the replies. It doesn't have any provisions for a solenoid of any kind, just all mechanical. I've heard of "Jones Mechanical" as they used to make gear drive tachs way back. So one told me it was developed to get around a rule book for only using a 9" Ford rear end at the track. It's just a really neat piece and looks new on the inside. It would be great in an old rat rod or something where you could see it. I think it would hit the top of my trans tunnel in my 66 Mustang. Thanks, Matt

Goober · #9 (**permalink**) 07-09-2009, 11:30 AM

Looks to me like an old 2 speed axle assembly out of a truck. They were either vacuum or electric operated. Button was located on the gear stick. Made a 4 speed into a 8 speed.
Just a wild guess. Pretty need piece

Mark

FUNFER2 · #10 (**permalink**) 07-09-2009, 12:22 PM

Tom- how much is that unit ?

Goober · #11 (**permalink**) 07-09-2009, 01:12 PM

http://www.stovebolt.com/techtips/2-speed%20axle.htm

OK Guys, mystery solved. Just as I suspected

Mark

FIA-ERA · #12 (**permalink**) 07-09-2009, 02:08 PM

Hey Mark, Thanks, that's pretty interesting too! But mine has no provisions for any solenoids or hoses. The hose barb on the top is for venting. Mine has a separate aluminum piece that bolts through to the pinion support of the 9". I haven't found any info. anywhere on this. Maybe someone has an old catalog from Jones Mechanical? All the gears are fixed just like a regular quickchange. The ratio is determined by the front gears added to the 9" gear ratio. I bet this ole thing makes a hell of a racket going down the road with these straight cut gears! This thing belongs in a hot rod with solid lifter, geared timing chain, glasspacks, and leaf springed chassis! Boy would that be a sight and sounds! Thanks, Matt.

Goober · #13 (**permalink**) 07-10-2009, 08:57 AM

Yea Matt, I agree, that thing would look reallly cool under a jacked up hot rod.

Mark

Jac Mac · #14 (**permalink**) 07-10-2009, 01:35 PM

Would make a cool prop reduction drive for a Kitplane/Scale warbird. Invert your V8 or Jag/BMW V12 and you have a low $$$ firewall fwd package.

FIA-ERA · #15 (**permalink**) 07-13-2009, 07:49 PM

Hey Guys, I still can not find any info. out there on this rear end attachment. I've found some info on "front loaded" quick change rear ends being outlawed in rule books but no pics or anything!! Is this piece that rare? It is pretty neat to say the least but there has to be someone out there who has seen this. It's bolted to a war case and I believe these were pretty old. I can't even find any info. on the company that made it! Thanks for all the previous replies! Matt.

legal Forum · #16 (**permalink**) 07-16-2009, 03:57 AM

Anyone have any ideas on how to drain the fluid since there is no drain plug? I'd like to change the gear oil before winter. Any ideas?