1. halifaxhops

    halifaxhops It's going to get stupid around here! FABO Gold Member

    Messages:
    73,160
    Likes Received:
    44555
    Joined:
    Jan 20, 2014
    Location:
    Hoppyworld, PA
    Local Time:
    6:13 AM
    @memike and myself decided to start a thread all about 8 1/4 rears and common problems. Lets start with carriers and housings. The housings are two different distinct easy to identify The first is the most common with the pinion centered for 2.57 ratio and down the other is the off center pinion carrier for 2.56 gears and up. see how the pinion is off centered.

    Here is the 2.56 and up carrier. DSC00603.JPG DSC00603.JPG DSC00602.JPG
     
    Last edited by a moderator: Aug 25, 2018
    • Like Like x 3
    • halifaxhops

      halifaxhops It's going to get stupid around here! FABO Gold Member

      Messages:
      73,160
      Likes Received:
      44555
      Joined:
      Jan 20, 2014
      Location:
      Hoppyworld, PA
      Local Time:
      6:13 AM
      DSC00596.JPG DSC00600.JPG Here is the most common housing. See the pinion is almost center. DSC00596.JPG

      There is a reason for this and here it is.


      The pinion on the left is a 2.45 the one on the right 3.23 So the pinion has to be offset to run those gears.
       
      • Like Like x 1
      • halifaxhops

        halifaxhops It's going to get stupid around here! FABO Gold Member

        Messages:
        73,160
        Likes Received:
        44555
        Joined:
        Jan 20, 2014
        Location:
        Hoppyworld, PA
        Local Time:
        6:13 AM
        But wait folks there is more, The carriers are different also. the one on the left is from a 3.23 rear and the one on the right is a 2.45 carrier. You can see the high ratio carrier flange for the ring is shifted back by almost half an inch so they are only able to fit into the respective carrier. We will up date this as the information goes on. Do not be afraid to add any information for the 8 /14 rears here.

        DSC00597.JPG

        DSC00598.JPG
         
        • Thanks! Thanks! x 1
        • halifaxhops

          halifaxhops It's going to get stupid around here! FABO Gold Member

          Messages:
          73,160
          Likes Received:
          44555
          Joined:
          Jan 20, 2014
          Location:
          Hoppyworld, PA
          Local Time:
          6:13 AM
          Another difference with some carriers are the carrier bearings, there are to different sizes one is 3.2?inch and the other is 2.8? inch. There was supposedly a year break in the 70's I believe 72 they went to the larger bearings but my 74 has the 2.8 ones.
           
        • 318willrun

          318willrun Utube channel 318willrun

          Messages:
          19,239
          Likes Received:
          22786
          Joined:
          Sep 13, 2013
          Location:
          I'm here
          Local Time:
          5:13 AM
          So, if the housings are different, can you pull out a 2.45 carrier and install a 3.55 carrier? If the 2.45 housing is different offset, then I would think this would be impossible, but some have installed 3.55's from a Dakota inplace of their 2.45's.
           
        • halifaxhops

          halifaxhops It's going to get stupid around here! FABO Gold Member

          Messages:
          73,160
          Likes Received:
          44555
          Joined:
          Jan 20, 2014
          Location:
          Hoppyworld, PA
          Local Time:
          6:13 AM
          Most of my gears come from Dakotas (Dana 30) You talking about the other way in a dana 30 no idea I would have to look at a housing to see. Yes it is impossible to do that now a carrier from the 245 going the other way you would need a spacer around 1/2 inch. MEMIKE is going through this right now and is just going to get the right carrier, I have no idea if a spacer would stand up to the forces, plus where would you find left hand bolts that long and strong?
           
          • Like Like x 1
          • halifaxhops

            halifaxhops It's going to get stupid around here! FABO Gold Member

            Messages:
            73,160
            Likes Received:
            44555
            Joined:
            Jan 20, 2014
            Location:
            Hoppyworld, PA
            Local Time:
            6:13 AM
            I think I remember a set of 2.45 from a dana and the ring was pretty small in thickness and the pinion was huge.
             
          • 318willrun

            318willrun Utube channel 318willrun

            Messages:
            19,239
            Likes Received:
            22786
            Joined:
            Sep 13, 2013
            Location:
            I'm here
            Local Time:
            5:13 AM
            little confused by what you've said. If somebody has a Duster with the 8 1/4 with factory 2.45's, can he put a 3.55 gear and carrier together from a '94 Dakota into the housing (in the Duster)?
             
          • halifaxhops

            halifaxhops It's going to get stupid around here! FABO Gold Member

            Messages:
            73,160
            Likes Received:
            44555
            Joined:
            Jan 20, 2014
            Location:
            Hoppyworld, PA
            Local Time:
            6:13 AM
            Probably has the off set carrier if it is 2.45 What I was trying to share was the carrier from a 2.45 is offset to one side and it prob could be used in a lower carrier with the center pinion if they had a spacer made up. Still confused? It is hard to explain. Look at the carrier pics for the offset. I do know for a fact the dana 30 carrier and gears will fit in a centered housing not the offset one. One of our members is going through the high ratio carrier will not fit in the lower carrier.
             
          • 318willrun

            318willrun Utube channel 318willrun

            Messages:
            19,239
            Likes Received:
            22786
            Joined:
            Sep 13, 2013
            Location:
            I'm here
            Local Time:
            5:13 AM
            I see the pictures, and understand the difference in carriers. What I'm asking is, can someone pull the factory 2.45 carrier out of their Duster and install the 3.55 carrier into the duster's housing?
             
          • halifaxhops

            halifaxhops It's going to get stupid around here! FABO Gold Member

            Messages:
            73,160
            Likes Received:
            44555
            Joined:
            Jan 20, 2014
            Location:
            Hoppyworld, PA
            Local Time:
            6:13 AM
            Not if it has the offset pinion the gears will not line up. Have to look at the carrier to be sure it is offset. It should be offset then no, if it is centered yes.
             
            • Thanks! Thanks! x 1
            • 1970-dart

              1970-dart Well-Known Member

              Messages:
              1,763
              Likes Received:
              99
              Joined:
              Mar 16, 2012
              Location:
              Vermont
              Local Time:
              5:13 AM
              i just installed a newer ( with reluctor ring) posi carrier with 3.55 gears in place of the open 2.45 carrier in my ( 8.25 that came out of a 1974 dart) car. The carrier and pinion bearing sizes were different on each carrier but i just ordered new bearings to fit the 74 factory carrier and they fit right on the newer carrier and went right in with no issues. pinion was same inside and outside diameter on both pinions but bought new bearing anyway.

              I have read where some people remove or grind down the teeth on the ring because it hits inside of the case. Mine did not hit so left it alone
               
              Last edited: May 27, 2016
              • Thanks! Thanks! x 1
              • halifaxhops

                halifaxhops It's going to get stupid around here! FABO Gold Member

                Messages:
                73,160
                Likes Received:
                44555
                Joined:
                Jan 20, 2014
                Location:
                Hoppyworld, PA
                Local Time:
                6:13 AM
                So you were able to off set it? How just bearings? I am defiantly interested in this. That's why this thread is here.
                 
                • Like Like x 1
                • 1970-dart

                  1970-dart Well-Known Member

                  Messages:
                  1,763
                  Likes Received:
                  99
                  Joined:
                  Mar 16, 2012
                  Location:
                  Vermont
                  Local Time:
                  5:13 AM
                  i have a thread with pictures on here someplace let me find it
                   
                • inertia

                  inertia Well-Known Member

                  Messages:
                  3,788
                  Likes Received:
                  1092
                  Joined:
                  Feb 4, 2011
                  Location:
                  Victoria B.C. Canada
                  Local Time:
                  3:13 AM
                  Hope this helps.

                  I've done this a few times, and what I found is that there are 2 different sure grip carriers.

                  One of the carriers will fit the 2:45 gearsets and lower numerically, and will not fit 3:55s

                  You'll need a suregrip carrier that came with a 2:76 or higher numerically to fit the 3:55's etc.

                  If the 3:55s come with a sure-grip from a vehicle, it'll fit if the axle splines are correct. (It is possible to mount the 3:55 on the wrong carrier, buyer beware.)

                  Bearing sizes, axle splines vary as mentioned above.

                  The reluctor ring is separate and can be left out.
                   
                  Last edited: May 27, 2016
                  • Thanks! Thanks! x 1
                  • Agree Agree x 1
                  • 1970-dart

                    1970-dart Well-Known Member

                    Messages:
                    1,763
                    Likes Received:
                    99
                    Joined:
                    Mar 16, 2012
                    Location:
                    Vermont
                    Local Time:
                    5:13 AM
                  • 1970-dart

                    1970-dart Well-Known Member

                    Messages:
                    1,763
                    Likes Received:
                    99
                    Joined:
                    Mar 16, 2012
                    Location:
                    Vermont
                    Local Time:
                    5:13 AM
                    and another i found from here in the research process. there is certainly tons of info out there and some is good and other not so much.

                    8.25 Dakota Gear Swap Wont Fit.
                     
                  • 1970-dart

                    1970-dart Well-Known Member

                    Messages:
                    1,763
                    Likes Received:
                    99
                    Joined:
                    Mar 16, 2012
                    Location:
                    Vermont
                    Local Time:
                    5:13 AM
                    so basically i bought that carrier/pinion ring gear setup. the carrier bearings that came with the new carrier were to big outside diameter but inside diameter was the same size as the ones on the old carrier and pinion bearing was the same inside and outside diameter but got new bearing as well.

                    So i bought new factory type/size bearings for the old carrier and installed them on the new carrier and did new axle seals and bearings as well.
                     
                    Last edited: May 27, 2016
                  • halifaxhops

                    halifaxhops It's going to get stupid around here! FABO Gold Member

                    Messages:
                    73,160
                    Likes Received:
                    44555
                    Joined:
                    Jan 20, 2014
                    Location:
                    Hoppyworld, PA
                    Local Time:
                    6:13 AM
                    I knew there were two different carrier, I need to post the bearing and race numbers of the two sizes since I have them around right now.
                     
                  • mguner

                    mguner How many is too many?

                    Messages:
                    5,051
                    Likes Received:
                    361
                    Joined:
                    Nov 26, 2006
                    Location:
                    Amarillo,TX
                    Local Time:
                    5:13 AM
                    I have not seen a difference in offset in the housings, only the carriers. My 75 Dart had the 2.45 gear set before I changed out the gear set and carrier to a sure grip from a Dakota. Still the same housing.
                     
                    • Thanks! Thanks! x 1
                    • Agree Agree x 1
                    • halifaxhops

                      halifaxhops It's going to get stupid around here! FABO Gold Member

                      Messages:
                      73,160
                      Likes Received:
                      44555
                      Joined:
                      Jan 20, 2014
                      Location:
                      Hoppyworld, PA
                      Local Time:
                      6:13 AM
                      There definitely was good info in both the threads for sure. I believe what we are trying to do with this one is to eliminate some of the issues of the 8 1/4 gear and carrier swap.
                       
                      • Like Like x 1
                      • halifaxhops

                        halifaxhops It's going to get stupid around here! FABO Gold Member

                        Messages:
                        73,160
                        Likes Received:
                        44555
                        Joined:
                        Jan 20, 2014
                        Location:
                        Hoppyworld, PA
                        Local Time:
                        6:13 AM
                        Kind of weird it fit I would love to see pics if you took them. Was the carrier offset compared to the others toward the left side installed?

                        In the beginning of this I took some pics and the "offset" carrier is the one not in the car.
                         
                      • mguner

                        mguner How many is too many?

                        Messages:
                        5,051
                        Likes Received:
                        361
                        Joined:
                        Nov 26, 2006
                        Location:
                        Amarillo,TX
                        Local Time:
                        5:13 AM
                        Actually I have never heard of different offset housings, only the carrier. It is just like the spacer for the Chevy rears where you shim out the ring gear instead of changing carriers. They used to make the spacer kit for the 8.25 and Dana I believe which also came with longer special bolts. The issue with using Dakota carriers is mid 96 and up have different spline count and some need different carrier bearings.
                         
                      • mguner

                        mguner How many is too many?

                        Messages:
                        5,051
                        Likes Received:
                        361
                        Joined:
                        Nov 26, 2006
                        Location:
                        Amarillo,TX
                        Local Time:
                        5:13 AM
                        I did take pics but they may be lost in Myspace somewhere.... There is definitely a difference in the 3.55 and 2.45 carriers but if the gears are matched with the correct carrier you should be good to go. I used the same shims from the 2.45 pinion and it set up fine with the 3.55.
                         
                      • inertia

                        inertia Well-Known Member

                        Messages:
                        3,788
                        Likes Received:
                        1092
                        Joined:
                        Feb 4, 2011
                        Location:
                        Victoria B.C. Canada
                        Local Time:
                        3:13 AM
                        There was different "posi" carriers for the chebby, for the taller gearset, and a M/Mouse "spacer" as mentioned. The spacer didn't prove to be too succesful, as spacing the ring-gear out took the ring-gear off it's register. Not having anything to "center" the ring-gear on except the bolts, allowed the ring-gear to wander, and eventually sheared/broke the bolts, damaging the gears.

                        I can't speak to any of the other "kits" avail.. specially for hipo stuff.
                         
                        • Like Like x 1
                        1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                          By continuing to use this site, you are consenting to our use of cookies.