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  1. Kern Dog

    Differences in linkages when swapping from. 904 to 727

    It has been awhile since I have made this change. Years ago I did a few but I don’t remember the details. Sometime soon, I’m going to pull the 360 and 904 from this: I plan to swap in a 340 to break it in, then a 360 that will stay. I need a more durable transmission since I simply don’t...
  2. Kern Dog

    8 1/4" axle gear interchange

    Hello... I have a non original 8 1/4" axle in a 69 Dart of mine.... It is a 2.71 geared CONE Sure Grip.... I want something better. This car may be getting an A-500 with overdrive so I'd like a 3.55 or a 3.91. That likely means a truck or van. I'm curious about what donor vehicles I can...
  3. Kern Dog

    The 904 won't upshift to 3rd gear.

    Hey everyone. THIS 67 Dart.... ...Has always been rough around the edges but still ran great. Lately, it won't upshift to 3rd gear. Aside from low fluid level, what else could cause this? The fluid smelled fine and the level was normal. It has a 360 4 barrel, an 8 3/4" axle too. The KD...
  4. Kern Dog

    Some ideas and questions about the FORD 8.8 axle:

    I am a bit behind the curve on this but it sounds interesting. I have read that the axles pulled from the Explorers have a long side and short side. It is a common thing to shorten the long side and use TWO short side axle shafts. What about buying TWO complete axles and having the axle shop...
  5. Kern Dog

    I'm considering an A 500 4 speed overdrive for a 72 Duster

    Who here has experience with this transmission? I do know a few things about this transmission. I know that it is based on the 904 series. I would expect it to also then be shorter and lighter than a 518 model. The early models were hydraulic so they require no controller to run. I am guessing...
  6. Kern Dog

    8 1/4" axle : What years do parts interchange?

    Hey there, I have a 1970 8 1/4" axle from a '70 Charger. The plan is to swap this into a 65 Valiant. I am aware of the difference in width but I intend to see if I can fit it in there and use 14 x 5.5 Ralleye wheels. This axle has a 2.71 ratio and I want to change it to either a 3.21 or a 3.55...
  7. Kern Dog

    Diff whine: Gears or bearings to blame?

    I have a 3.91 diff with a clutch type SG in it. It is quiet as can be until about 50 mph. It sounds louder at light throttle but is still there at cruise or WOT. I can be cruising along at 65 and lift off of the gas and it goes away, ease back in it and the noise comes back. The diff was rebuilt...
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