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What is the gear ratio of my rear end? #1484710 08/14/13 10:26 PM 08/14/13 10:26 PM
Joined: Jan 2012 Posts: 87 IL 6 66HEMICORONET OP member
66HEMICORONET OP member 6 Joined: Jan 2012 Posts: 87 IL	I have got a 66 Coronet 440 4spd with a 426 hemi. All I can read on the original tag is 3.5 I have seen some websites that have it listed as a 3.55 and others that list it as a 3.54.

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484711 08/14/13 10:30 PM 08/14/13 10:30 PM
Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ...	8 3/4 or Dana? Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

Re: What is the gear ratio of my rear end? [Re: amxautox] #1484712 08/14/13 10:32 PM 08/14/13 10:32 PM
Joined: Jan 2012 Posts: 87 IL 6 66HEMICORONET OP member
66HEMICORONET OP member 6 Joined: Jan 2012 Posts: 87 IL	Its a Dana 60

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484713 08/14/13 10:33 PM 08/14/13 10:33 PM
Joined: Aug 2003 Posts: 18,575 Dreaming of the 808 AZ_A12_BEE I Live Here
AZ_A12_BEE I Live Here Joined: Aug 2003 Posts: 18,575 Dreaming of the 808	Quote: I have got a 66 Coronet 440 4spd with a 426 hemi. All I can read on the original tag is 3.5 I have seen some websites that have it listed as a 3.55 and others that list it as a 3.54. Easiest way to verify is to jack up rear end, spin the tire 360 degrees while counting how many revolutions the yoke turns. Takes 5 minutes at most. 69.5 A12 Bee, first purchased in 1976, car 169 on registry 69 Coronet R/T 440/4 spd 69 Coronet 500 Conv H code 383 4bbl/auto 37 Plymouth PU Find your spot on earth and ride it.

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484714 08/14/13 10:34 PM 08/14/13 10:34 PM
Joined: Nov 2007 Posts: 21,855 Kirkland, Washington Pacnorthcuda Too Many Posts
Pacnorthcuda Too Many Posts Joined: Nov 2007 Posts: 21,855 Kirkland, Washington	Then it would be a 3.54, assuming the tag on the rear is still representative of the ring and pinion inside.

Re: What is the gear ratio of my rear end? [Re: AZ_A12_BEE] #1484715 08/14/13 10:38 PM 08/14/13 10:38 PM
Joined: Jan 2012 Posts: 87 IL 6 66HEMICORONET OP member
66HEMICORONET OP member 6 Joined: Jan 2012 Posts: 87 IL	sounds easy but the rear end is not in the car.

Re: What is the gear ratio of my rear end? [Re: Pacnorthcuda] #1484716 08/14/13 10:39 PM 08/14/13 10:39 PM
Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ...	Yup. 8 3/4 came in 3.55 and Dana came in 3.54. Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484717 08/14/13 10:39 PM 08/14/13 10:39 PM
Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ...	Quote: sounds easy but the rear end is not in the car. You can still turn an axle and watch/count the pinion/yoke. Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

Re: What is the gear ratio of my rear end? [Re: amxautox] #1484718 08/14/13 10:48 PM 08/14/13 10:48 PM
Joined: Jan 2012 Posts: 87 IL 6 66HEMICORONET OP member
66HEMICORONET OP member 6 Joined: Jan 2012 Posts: 87 IL	Would there be a noticeable difference when spinning the 3.55 and the 3.54 that ratio sounds about the same.

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484719 08/14/13 10:50 PM 08/14/13 10:50 PM
Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ... amxautox Still Retired. Still Posting on Moparts. A Lot.
amxautox Still Retired. Still Posting on Moparts. A Lot. Joined: May 2003 Posts: 96,666 On The Boat, On The Lake, Wa. ...	It can only be determined mathematically, I doubt anyone can feel the difference. Tom "Everyone should believe in something; I believe I'll go fishing." -Henry David Thoreau Men and fish are alike. They both get into trouble when they open their mouths author unknown

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484720 08/14/13 10:52 PM 08/14/13 10:52 PM
Joined: Jan 2003 Posts: 104,346 Garden Grove, CA OzHemi Penguin-hating Ginger
OzHemi Penguin-hating Ginger Joined: Jan 2003 Posts: 104,346 Garden Grove, CA	Quote: Its a Dana 60 Just pull the cover off it and see what the gears say and know for certain that way.

Re: What is the gear ratio of my rear end? [Re: 66HEMICORONET] #1484721 08/14/13 10:53 PM 08/14/13 10:53 PM
Joined: Nov 2007 Posts: 21,855 Kirkland, Washington Pacnorthcuda Too Many Posts
Pacnorthcuda Too Many Posts Joined: Nov 2007 Posts: 21,855 Kirkland, Washington	Quote: Would there be a noticeable difference when spinning the 3.55 and the 3.54 that ratio sounds about the same. There is NO 3.55 Dana 60. The 3.55 is a 8.75.

Re: What is the gear ratio of my rear end? [Re: Pacnorthcuda] #1484722 08/15/13 03:46 AM 08/15/13 03:46 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	Quote: Quote: Would there be a noticeable difference when spinning the 3.55 and the 3.54 that ratio sounds about the same. There is NO 3.55 Dana 60. The 3.55 is a 8.75. 8 3/4 = 3.55 or 3.91 Dana 60 Tracpac = 3.55 Dana 60 Super Tracpac = 4.10 I am truckless..

Re: What is the gear ratio of my rear end? [Re: 340SHORTY] #1484723 08/15/13 11:50 AM 08/15/13 11:50 AM
Joined: Jan 2007 Posts: 10,190 A Red State SNK-EYZ I Live Here
SNK-EYZ I Live Here Joined: Jan 2007 Posts: 10,190 A Red State	Quote: Quote: Quote: Would there be a noticeable difference when spinning the 3.55 and the 3.54 that ratio sounds about the same. There is NO 3.55 Dana 60. The 3.55 is a 8.75. 8 3/4 = 3.55 or 3.91 Dana 60 Tracpac = 3.54 Dana 60 Super Tracpac = 4.10 Corrected.... Dana 60's are 3.54 gears. Kayse can't keep up at all now. lol

Re: What is the gear ratio of my rear end? [Re: SNK-EYZ] #1484724 08/15/13 08:13 PM 08/15/13 08:13 PM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	Quote: Quote: Quote: Quote: Would there be a noticeable difference when spinning the 3.55 and the 3.54 that ratio sounds about the same. There is NO 3.55 Dana 60. The 3.55 is a 8.75. 8 3/4 = 3.55 or 3.91 Dana 60 Tracpac = 3.54 Dana 60 Super Tracpac = 4.10 Corrected.... Dana 60's are 3.54 gears. fat fingers and bad eyes.. I am truckless..

Re: What is the gear ratio of my rear end? [Re: 340SHORTY] #1484725 08/15/13 09:22 PM 08/15/13 09:22 PM
A Anonymous Unregistered
Anonymous Unregistered A	In 66-67, the only rear axle ratios available behind a 426 Hemi were 3.23 and 3.55 with automatic trans or 3.54 with a 4-speed. Automatic rears were 8 3/4; 4-speed rears were Dana 60.

Re: What is the gear ratio of my rear end? [Re: Pacnorthcuda] #1484726 08/15/13 11:06 PM 08/15/13 11:06 PM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	Spicer makes 3.54 and 3.55 gears for Dana 60 rearends. Contact info

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