Well i got a little spending money and think i want to go ahead and start buying the stuff for a center chunk build.

I was going to go oem but all i keep finding is the car style chunks. So i wanted to ask for a daily driver truck what center chunk would be a good durable aftermarket replacement that isnt too crazy on the price?

 

Well no replies yet, reason I ask is cause on Summit I can get a Summit 9" center chunk bare or a Strange brand 9" center chunk price difference is not much. Strange is $245.97 and Summit is $209.97.

I can buy a Currie center chunk fully built with 3.25:1 ring and pinion and a Detroit truetrac for $1500. But I am wanting to spread the cost out over time as well as try to buy better quality parts. So far I'm looking at $1000 - $1100 for everything as of now.

 

Strange makes good 9 inch Ford parts. I see Street/Strip cars running Strange axle shafts and carriers quite a bit. It's usually Strange or Moser with Currie being used in the higher $ higher HP/TQ builds. It's that or try and find a nodular iron carrier. Strongest stock FoMoCo carrier that was made for the 9 inch.

 

Nodular iron is what i am trying to find being a stock truck id go with a factory third member case but my head is spinning as theres so much variation so i figured aftermarket would be more universal. I found some used cases complete with pinion support for $80 which i would buy but just dont know if it would work on my axle. I also dont want to build mine since im doing a gear swap, if i dont like the new gears i can swap my old third member back in and change the gears in the new built unit.

I guess i might need to look and see if the ford parts and illustration guide gives a part number for the case for trucks that i can search for.

 

Are you sure the truck 3rd member is Nodular Iron?
If that was the case I would think you would not be able to find any in the junk yards as all the racers would grab them.
That is why I think it is just a normal Ford 9" 3rd member.


If that is the case any JY or swap meet 3rd member would work. And if I under stand you right you will supply your own carrier, maybe a LS or what ever Ford calls it & gear set. You will build it on the bench all ready to swap in right?


Now for the carrier I know for the GM 10 bolt and the AMC model 20 they have 2 different carriers based on the R&P ratio. It has to do with how thick the ring gear is for the ratio.
I do not know if Ford does the same thing or not so might be best to call some of the suppliers of diff. gears to see what they have to say.


I have used DTS - Drive Train Specialists and have been vary happy with the service I have gotten.
When I built my AMC 20 for drag racing I bought the R&P, bearing setup kit and a Detroit locker. They said to use the old ring bolts but on the ones I pulled out were left handed threads. I called them up told them what I had & needed and they over night the right bolts free!


I also bought kits for my K5 Blazer when I went from 3.25 to 4.11's. Then 2 more times for the rear of that same truck all my fault.
So have dealt with them a few times.
Dave ----

 

Can't change physics, Ford had different series carriers also.

I swapped a older 9 inch center out of a 70's Bronco into my 1980 f150. I took the ring gear off and swapped it onto my 1980 carrier since the holes where bigger for the 31 spline axles, the old Bronco had 28 spline. Put my 1980 spider gears in place and put it all in the old Bronco center and then bolted it to the 1980 axle. It all fit fine.

When I was doing all this I checked around and a local machine shop said they would take the 28 spline carrier and chuck it up in a lathe and turn the hole bigger so the 31 spline axles would fit. They said they did it all the time for people.

 

Y'all are confusing carrier with case.

Pic: Carrier (aka pumpkin): 4141 .. Case: 4204

 

ND you sure on that or is this what Ford calls them?


I ask because everything else I have ever worked on the carrier is 4204 that the Ring gear bolts to.
Carrier:
MG DOOZ-4204-D

The case 4141 AKA 3rd member loaded (with gears/bearings) or un-loaded (just the case).
3rd member:
SE N-1906
Dave ----

 

Found a place quickperformance. They sell used 3rd members and i want to call them up as they want $180 for their 3rd member that was bead blasted. I think if i call them up i can tell them what im planning on doing and what im looking for. Should get the right 3rd member housing that way.

Aside from there i will be buying the parts all seperate and assembling myself. Ill be getting the detroit truetrac and the richmond 3.25 gear from summit and once i have everything here ill source locally the right assembly kit.

 

What it sez in the parts catalog inre to 4141 & 4204:

 

I was thinking about the spline count when I posted but did not know the carrier would have changed because of it.


What holes needed to be opened up? Was it the carrier for the larger axles to pass thru?
If so would that make it weaker at the bearing area to hold the carrier to the 3rd member?
Just cant see what it is you talked of in my head.
Then again I have been told there is nothing in my head also
Dave ----

 

So Ford calls it something different than the rest of the world does.


What I also find funny is if you look at my post of what the rest of the world calls the parts the link 4204 calls it a carrier. Same part number as Ford but calls it what "we" know it as.


Sorry I doubted you I will try not to let it happen again

Dave ----

 

Consider this: The 9" was introduced in 1957 and FoMoCo has referred to these two parts the same thru 1987. Ditto for the 8" used 1962/80.

What the after market world calls parts may be the same as FoMoCo, may not be.

What some FTE members call parts is sometimes unrealistic, like the so called "carrier" bearing on a two piece driveshaft.

First time I read a post on FTE inre to this bearing, I thought to myself: What the hell is this guy asking for?

FoMoCo: Driveshaft Center Support Bearing. A carrier bearing is another name for a differential bearing, see 4221 in parts catalog pic in post #7.