Re: What rearend for turbo car?
[Re: moparmafia]
#2461350
03/05/18 07:16 AM
03/05/18 07:16 AM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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The dana being referred to is actually a 71. No real good parts available for it.
I would (and have) gone with the strange ultra case. The standard ultra case takes a true 9” gear, but the pinion shaft can be upgraded to a large 35 spline configuration. This particular setup will allow down to a 3.40 ratio. If you upgrade to the 9.5” gear set, you can get a ratio as low as 3.2. These are pro gear sets. Running low ratios is extremely hard on everything in front of the rear end. Plan on spending a whole lot on trans parts.
"use it 'till it breaks, replace as needed"
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Re: What rearend for turbo car?
[Re: TRENDZ]
#2461578
03/05/18 05:38 PM
03/05/18 05:38 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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The dana being referred to is actually a 71. No real good parts available for it.
I would (and have) gone with the strange ultra case. The standard ultra case takes a true 9” gear, but the pinion shaft can be upgraded to a large 35 spline configuration. This particular setup will allow down to a 3.40 ratio. If you upgrade to the 9.5” gear set, you can get a ratio as low as 3.2. These are pro gear sets. Running low ratios is extremely hard on everything in front of the rear end. Plan on spending a whole lot on trans parts. Dana makes the 61,71 and maybe even the 81 series with the 3.54 and higher sped ratios. The 61 first came in the Ford 3/4 ton trucks with a 3.30 ratio, later in the Dodge pickup CTD trucks as already mention with the 3.30 and 3.07 One of the local scrap yards has both, maybe I should scoop both of them up for future builds
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: What rearend for turbo car?
[Re: moparmafia]
#2461592
03/05/18 06:00 PM
03/05/18 06:00 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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The only CTDs that had a 61 axle were the “W” (4wd) and they were front axles. All pre overdrive CTDs had rear 71s otherwise known as D70U. The only difference from a standard 70 was an internal “U”ndercut for the large pinion gear tooth clearance. Not a good rear for performance by any means. The reason I know this is I have seen more than my fair share, and had to source parts for them.😉
"use it 'till it breaks, replace as needed"
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Re: What rearend for turbo car?
[Re: TRENDZ]
#2461665
03/05/18 09:07 PM
03/05/18 09:07 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Me thinks your confusing the Dana 60-2(they have the 60-2 cast into the housing above the pinion shaft ) 4x4 front ends with the Dana 70, some of the later 3500 CTD trucks came with some version of Dana 70 up front and Dana 80 in the back I'm going to do some research on those 61 carriers to see if they will accept the Dana 60 35 spline clutch type posi internals
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: What rearend for turbo car?
[Re: Cab_Burge]
#2461669
03/05/18 09:11 PM
03/05/18 09:11 PM
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Joined: Feb 2005
Posts: 20,116 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,116
PA.
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Is Dana really Mopar or are you confused. Lmao.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: What rearend for turbo car?
[Re: moparmafia]
#2461675
03/05/18 09:20 PM
03/05/18 09:20 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Yes. Do some research. As previously stated, all pre overdrive CTD trucks had 70U/71 rear axles. The only exception is the very rare 4:XX to 5:13 dana 70 in military lot tugs.
"use it 'till it breaks, replace as needed"
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Re: What rearend for turbo car?
[Re: pittsburghracer]
#2461682
03/05/18 09:30 PM
03/05/18 09:30 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Is Dana really Mopar or are you confused. Lmao. Touche, Essay You be right Bro , Dana makes all of their parts for who ever wants to buy enough of them to warrant dealing with those companies.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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