3.08 ratio dana61??
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
Thread Starter
|
Posting Guru
Joined: Sep 2003
Posts: 1,168
Likes: 1
I have a powerstroke with sterlingrear its 2wd right now but im going to make it 4x4 i have all the parts i just gotta do it. I just want to make it a taller gear. My dmfriend had a 6.0 with egr delete and 3.55s and getting 19.5 mpg highway on 40s and it would smoke the tires right off so i think diesels like tall gears. A 300 i6 is gutless and could benefit from 4.10s because it cant go 70 anyways lol sry that was mean... But on my psd it could really use a taller gear
Postmaster
Joined: Mar 2008
Posts: 3,255
Likes: 0
From: Sweet Home, OR
My 1-ton '52 *****'s Pick-up has left hand lug nuts on one side.
Postmaster
Joined: Mar 2008
Posts: 3,255
Likes: 0
From: Sweet Home, OR
Don't think I would put 3.08s in a small gasser unless it didn't have overdrive and/or was spending 95% of its time above 70 MPH. Maybe a small F100.....
My F150 has 3.55s and I feel it would benefit from 4.10s in terms of power and fuel economy. I don't know much about how the 300 performs across its RPM band, but the 302 in my other truck is sluggish off the line just like you describe. You need to get to about 15 MPH before it starts really pulling. For light driving you don't notice it but if trying to pull hard off the line its almost like waiting for a turbo to spool. Feels like mush.
Jim Allen has what I hear is a really nice book on differentials that I've been meaning to get. Never got around to it though.
My F150 has 3.55s and I feel it would benefit from 4.10s in terms of power and fuel economy. I don't know much about how the 300 performs across its RPM band, but the 302 in my other truck is sluggish off the line just like you describe. You need to get to about 15 MPH before it starts really pulling. For light driving you don't notice it but if trying to pull hard off the line its almost like waiting for a turbo to spool. Feels like mush.
Jim Allen has what I hear is a really nice book on differentials that I've been meaning to get. Never got around to it though.
I have an autographed copy.
(I was trying to find a "snob" face/carachter but there isn't one.)
Laughing Gas
Joined: Aug 2003
Posts: 919
Likes: 4
From: Newberg Oregon
You made you point ,LOL
also 61,s with 308's wont accept any lower gears IIRC , I just went thru this on a buddys 76 with a swapped in rear.
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Was there some sort of deal with the Dana 61s where you could swap out the carrier from the 60 to get lower gear ratios? (numerically higher)?
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
Did some parts book looking. According to the Dana book and another parts book.
61 Semi floats show parts listing for 300 and 307 gears.
61 full floats show 331 and 307 gears for both limited slip and open diffs for diff. carriers they call low ratio. For high ration carriers they show up to a 456 for open carriers and 410 in limited. They show for 61-1's and -2's .
Do not know the difference between a -1 and -2. Curious though. I will find out.
"Was there some sort of deal with the Dana 61s where you could swap out the carrier from the 60 to get lower gear ratios? (numerically higher)?"
Yeh some parts are interchangeable. including carriers
61 Semi floats show parts listing for 300 and 307 gears.
61 full floats show 331 and 307 gears for both limited slip and open diffs for diff. carriers they call low ratio. For high ration carriers they show up to a 456 for open carriers and 410 in limited. They show for 61-1's and -2's .
Do not know the difference between a -1 and -2. Curious though. I will find out.
"Was there some sort of deal with the Dana 61s where you could swap out the carrier from the 60 to get lower gear ratios? (numerically higher)?"
Yeh some parts are interchangeable. including carriers
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
According to the parts books the same carrier is used for gears down to 354's.
Of coarse. These books are show every option that Dana made for them. Allot of them are discontinued and finding a set new is impossible. Not to many companies cut gears for differentials anyway. Like battery manufacturers. You can count them on one hand.
I have been called by people looking for a set of 300 gears for a 61. They must not be made anymore and hard to find. Don't know why a 307 gear wouldn't do what they wanted to do. Didn't ask.
Of coarse. These books are show every option that Dana made for them. Allot of them are discontinued and finding a set new is impossible. Not to many companies cut gears for differentials anyway. Like battery manufacturers. You can count them on one hand.
I have been called by people looking for a set of 300 gears for a 61. They must not be made anymore and hard to find. Don't know why a 307 gear wouldn't do what they wanted to do. Didn't ask.
Thread
Thread Starter
Forum
Replies
Last Post
FastGilla
1987 - 1996 F150 & Larger F-Series Trucks
5
Apr 21, 2011 09:25 AM
habfam
Clutch, Transmission, Differential, Axle & Transfer Case
6
Sep 22, 2004 05:04 PM
FordDrvr
Clutch, Transmission, Differential, Axle & Transfer Case
21
Jul 22, 2003 11:30 PM
