Farley`s Dodge Diplomat Forum

Forum Index => The Garage => Topic started by: M326697 on February 17, 2014, 22:00:13

Title: 85 Chrysler 5th Ave Rear Differential Advise
Post by: M326697 on February 17, 2014, 22:00:13
Hi Gang, I am new to this site and need some advise Please.
I handed down an 85 5th Ave to my son. The other night he lost drive and the right axle had moved out from the axle housing.
We took it apart and found the c-clip had fallen out. Here is where the fun begins.
We need to remove the carrier assembly from the axle housing.
We removed the axles but we can not remove any of the spider gears, the cross pin bolt broke. The bolt was removed but the insert is in the cross pin. We can spin the cross pin yet we can not slide it through the carrier assembly. So we want to remove the carrier assembly. I removed the 2 bearing caps but we can not pull the carrier assembly out. It moves towards me some but not all the way. Is there something else holding on to the bearings?? I saw an old training video that talks about the 7.25 rear and it mentioned that a tool was required which was inserted in the axle housing which loosened some adjuster. Is this system used on my 85 rear axle.
Any help would be appreciated.
M326697 - Mike t.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: spike on February 17, 2014, 22:13:38
there is an adjuster on each side, IIRC an a-body torsion bar fits it perfectly to back em out to pull the center chunk
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 81SportCoupe on February 25, 2014, 16:48:03
I made a tool using a large truck 7/8 hex lug nut, and welding a large extension to it. IT has been awhile, but i think i had to grind the hex down to fit perfectly, and i rounded the front edge to slid in easier.
 If you can't/or don't want to make your own, i found a few. $20-$30 w/shipping

http://www.ebay.com/itm/DODGE-CHRYSLER-9-25-8-25-7-25-AXLE-TOOL-SPANNER-REAR-END-WRENCH-ADJUSTER-CARRIER-/141180393997?pt=Motors_Car_Truck_Parts_Accessories&hash=item20df01da0d&vxp=mtr

and a slightly more expensive one, with long shaft end
http://www.ebay.com/itm/DODGE-CHRYSLER-9-25-8-25-7-25-AXLE-TOOL-SPANNER-REAR-END-WRENCH-ADJUSTER-CARRIER-/141196286501?pt=Motors_Car_Truck_Parts_Accessories&hash=item20dff45a25&vxp=mtr

here is a nice how-to link, tool works for 7.25,8.25; and 9.25 rears
http://flipflopfabrication.blogspot.com/2011/05/how-to-make-your-own-chrysler-825.html
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: M326697 on March 01, 2014, 21:15:02
Thanks all for the replies. My son and I decided it was time to put the 5th Ave to rest. It was a sad day for my son and I. We had a lot of fun with that car. We discovered the main ring had a broken tooth. Too much money and too cold to be working on this.
Thanks again M326697 - Mike t.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 79dodge4ever on March 01, 2014, 21:16:58
Thanks all for the replies. My son and I decided it was time to put the 5th Ave to rest. It was a sad day for my son and I. We had a lot of fun with that car. We discovered the main ring had a broken tooth. Too much money and too cold to be working on this.
Thanks again M326697 - Mike t.

cheap fix, another 7.25 in a junkyard or off craigslist is about $175 and an hour or two to put it in

trust me if I can work outside in the winter in canada, so can anyone else
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: Mike on March 02, 2014, 00:22:07
^^^^yep. I replaced my axle when I blew the tranny out.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: MarkM on March 04, 2014, 20:27:16
Thanks all for the replies. My son and I decided it was time to put the 5th Ave to rest. It was a sad day for my son and I. We had a lot of fun with that car. We discovered the main ring had a broken tooth. Too much money and too cold to be working on this.
Thanks again M326697 - Mike t.

Too bad, complete 7.25 axles are all but given away.  That's what I did with mine.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 80 Lebaron Coupe on March 04, 2014, 21:53:39
I would give you a complete 7.25 out of a 85 Dip if you were close enough.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 270SE on March 04, 2014, 22:11:56
I would give you a complete 7.25 out of a 85 Dip if you were close enough.
Same here, in central NC. Have a 2.7 7-1/4 complete with nothing wrong with it- took it out years ago and it just sits on a '63 B fender.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 80 Lebaron Coupe on March 04, 2014, 22:56:06
Same here, in central NC. Have a 2.7 7-1/4 complete with nothing wrong with it- took it out years ago and it just sits on a '63 B fender.
Damn 270, We cant even give them away.
I will have 4 available after the swaps.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: DobaMark on March 05, 2014, 06:23:00
I'm at the point where I have to decide to put money into the 7.25" axle for my Valiant.  It's noisy.  But the only other choice is really an a body 8.75" which is really expensive.  Or to swap to big bolt pattern and waste the money I have invested in small bolt wheels.

I hate the 7.25" axle.  Have I said that before
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: spike on March 05, 2014, 06:28:33
Well i was gonna suggest a dakota rear as its only a lil wider and will bolt to the factory dprings
But then you mentioned the bolt pattern :doh:
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: brotherGood on March 05, 2014, 06:46:21
Well i was gonna suggest a dakota rear as its only a lil wider and will bolt to the factory dprings
But then you mentioned the bolt pattern :doh:

Did I miss something?
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: spike on March 05, 2014, 08:01:25
Was replyin to dobamark
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: brotherGood on March 05, 2014, 08:12:12
Was replyin to dobamark

I see it now..I wasn't seeing anything about bolt pattern..must've just missed it
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 270SE on March 05, 2014, 22:03:53
Well i was gonna suggest a dakota rear as its only a lil wider and will bolt to the factory dprings
But then you mentioned the bolt pattern :doh:
Bolt pattern's not a problem with an '87-'90 rear. Only '91-'04s were 6 lug.

I'm at the point where I have to decide to put money into the 7.25" axle for my Valiant.  It's noisy.  But the only other choice is really an a body 8.75" which is really expensive.  Or to swap to big bolt pattern and waste the money I have invested in small bolt wheels.

I hate the 7.25" axle.  Have I said that before
What's become popular are the Explorer 8.8 swaps (cheap, disc brake rear with LSD and steep gears, yoke is offset unless you swap axles- which can be done cheap using Aerostar parts I've read)

The other thing is just using a '66-'70 B body 8-3/4 rear end with the perches moved .5" on either side inboard- which I can't see why you wouldn't as opposed to upgrading to the A body rear. Or door number 3, use a donor '73-6 car for the front spindles, UCAs, and rear 8-1/4.

5x4 isn't worth keeping unless you have the small bolt early Mustang-style K-H discs and want to run 13" wheels. And it's probably not worth keeping then either.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: DobaMark on March 06, 2014, 06:22:08
I think my best option would be to find a disc brake later A body and get rid of the 7.25 for an 8.25 and gain front discs.  But I've got two sets of tires (one for show) mounted on 14x5.5 small bolt wheels.  I guess I could track down some Aspen 14x6 wheels if I find a later A body donor car.  Then I could sell the 14x5.5 small bolt wheels for some decent cash.

It's just a little slant 6 car - I don't think I'll be swapping a V8 in though you never know.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 270SE on March 06, 2014, 10:25:25
I think my best option would be to find a disc brake later A body and get rid of the 7.25 for an 8.25 and gain front discs.  But I've got two sets of tires (one for show) mounted on 14x5.5 small bolt wheels.  I guess I could track down some Aspen 14x6 wheels if I find a later A body donor car.  Then I could sell the 14x5.5 small bolt wheels for some decent cash.

It's just a little slant 6 car - I don't think I'll be swapping a V8 in though you never know.
Aspen/Volare, Barracuda/Challenger, and Charger/Satellite all came with 14x6 Rallyes and even more came with 14x6 steelies.

The repop Rallyes are fairly cheap so that does hurt what the original wheels go for, but they still should have no problem paying for another set. Benefit of that is that E and B body/'73+ Rallyes also are affected similarly so are pretty cheap.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: spike on March 06, 2014, 12:12:44
Bolt pattern's not a problem with an '87-'90 rear. Only '91-'04s were 6  lug

Bolt pattern is a problem when your car has a 4" bolt pattern
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 79dodge4ever on March 06, 2014, 12:23:19
Bolt pattern is a problem when your car has a 4" bolt pattern

have machine shop redrill axles for 4" bolt pattern, plenty of meat there for it
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 81SportCoupe on March 06, 2014, 18:13:27
i think i still have an extra 7 1/4 laying around
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 270SE on March 06, 2014, 19:29:59
Bolt pattern is a problem when your car has a 4" bolt pattern
Not really when nobody should have 4" bolt pattern. Just change the front to late discs while you do it.
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 79dodge4ever on March 06, 2014, 20:43:04
Not really when nobody should have 4" bolt pattern. Just change the front to late discs while you do it.

alot of A bodies do, and personally I wouldn't change nice wheels to get 4.5 bolt pattern, dads 66 dart style canadian valiant has small bolt slots and I'm not planning on changing them since it has 8 3/4 in the rear and scarebird discs in front
Title: Re: 85 Chrysler 5th Ave Rear Differential Advise
Post by: 270SE on March 06, 2014, 22:49:42
alot of A bodies do, and personally I wouldn't change nice wheels to get 4.5 bolt pattern, dads 66 dart style canadian valiant has small bolt slots and I'm not planning on changing them since it has 8 3/4 in the rear and scarebird discs in front
That's a pretty rare circumstance to be in. And typically, all the good wheel styles are in 4.5 that are in 4".