Discussion in 'General Automotive Discussion' started by intercooler, Jun 22, 2015.
Someone is gonna say Google it
I'll display my ignorance....
Old School Challengers used a "live rear axle". So google that and you will get a good description. In general, live rear axles are better for drag racing.
Since the reintroduction of the late model Challengers they have used a "Independent Rear Suspension" (IRS) in which the differential housing is bolted to the car's frame and there are two "1/2 shafts" for axles that go out the wheels. IRS is generally better for road racing and handling. Do a search for IRS.
Both types of rear ends, depending on a bunch of other factors can be prone to wheel hop. It is generally easier to deal with wheel hop with a live rear axle. (traction bars) Wheel hop in an IRS setup carries a much higher risk because you can easily break a 1/2 shaft. Stiffened or solid mounting bushings for the differential housing to the subframe and subframe to the car are methods to address wheel hop. Changing the OEM rubber mounts to solid tends to introduce a lot more noise into the car (vibration, gear noise, road noise).
Ok...I'm out... someone else tag in!
Old school Challengers with the Hemi had the Dana 60. It was huge and weighed a lot. But very strong.
Most E-body mopars had the mopar 8 3/4" both axles were solid axles with some gear options
The new Challengers have an independent rear end. I did not see any gear options when I ordered my Hellcat. But I am guessing with todays engineering the independent rear end is stronger and lighter than the Dana 60 of the early 70s. But that is for somebody else to report on.
I'm better with old school so here goes.
Pig or Pumpkin-Removable from housing contains ring gear and pinion shaft. 70 muscle cars used 8 3/4 (it's named after ring gear size) with a 1 7/8 thick pinion shaft, pre 69 so 68 and earlier 8 3/4 had 1 3/4 pinion so not as strong. Option was Trak Pak that gave it a limited slip which are clutch packs on both sides of the carrier(part that holds ring gear).
Non muscle cars with 318 or 225 came with 8 1/4 rear end no pig.
Then there was Dana 60 which the option was Super Trak Pak which was a 9 3/4 ring gear contained in housing(no pig).
8 3/4 gear ratios 2.76, 3.08, 3.23, 3.55, 390, 4.11. 4.56, 5.12 3.23 was common in muscle cars.
9 3/4 gear ratios 3.54. 3.91, 4.10 from factory.
All 69 1/2 Six Pack cars came with Dana 60 and 4.10 gears
Dana 60 only could be had with 426 Hemi, 440 and 440 6BBL cars
Is this what you wanted intercooler
not me you freakin millennial
My '70 340 4 speed car had the 8 and 3/4 with factory 323 gears. I put a set of Richmond 391s and what a difference. Being young and stupid, I decided to do it myself. I did learn that the 8 3/4 has a crush collar that is supposed to be a single use only and puts preload on the pinion bearings when being torqued. Also, the ring gear bolts that held the ring gear on to the "pumpkin" are left hand thread. I learned that after I snapped the first 2 bolts. I thought holy shit these are tight and did they put locktite on these? Um no, they just need to be loosened in the other direction. LH thread. They did that on the wheel lugs on half the car too, but I can't remember which side. Those brain cells are long gone.
I thought the newer Challengers they took underpinnings from Daimler when they owned Dodge. I thought it was E class stuff.
That's all I can add.
Left side got left hand thread lug nuts
Called the W210 platform E, C and S class mostly the same, same as Maserati, Hyundai Genesis, Equuos and I believe a Kia rear drive car probably others too but no one wants to admit it
Thanks Purnrg. Hell, I'm learning something new and this isn't even my thread.
Cool beans. I'm just trolling for the past hour.
God piece of info, if you nee rear axle seals on an LX get them from a MB dealership they are a Sprinter Part, Chrysler will only sell you a rebut rear end, found that out when I put a 3.43 Gear in my 2008 Challenger, they are a bit of a dog of the line with the 3.06
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