Advice for purchasing an F4 or bigger truck
#16
10-07-2013, 09:47 PM
Posting Guru
Abe, I have to disagree about the F6- F600, the two speed rear does not add a higher gearing, it adds a lower than granny gear. The F-5 came with either a 5.83 or a 5.14 (which is what I have) The F6 2 speeds were 5.83/8.11 or 6.33/8.81. So the F6 will give you more low end pulling power, but the same, and in most cases lower highway speeds.
#17
10-07-2013, 09:51 PM
Abe, I have to disagree about the F6- F600, the two speed rear does not add a higher gearing, it adds a lower than granny gear. The F-5 came with either a 5.83 or a 5.14 (which is what I have) The F6 2 speeds were 5.83/8.11 or 6.33/8.81. So the F6 will give you more low end pulling power, but the same, and in most cases lower highway speeds.
#18
10-07-2013, 09:57 PM
The Dana 70 was a very easy swap.
#19
10-07-2013, 10:01 PM
Yeah, the 272 will give you a bit more RPM than the flathead. A safe cruising RPM for that would be about 3200, wouldn't want to run it much more than that. With 8R19.5 wheels that would top you out at about 55mph.
#20
10-07-2013, 10:09 PM
I got the 4:10 Dana 70 out of a '69 F350 and it came with 16.5" stud piloted wheels, poor tire selections. I found 16" stud piloted wheels and have a better selection of tall tire sizing. From what I've learned, the Sterling with hub pilot would have been a better, same cost, choice. Perhaps research would have given me other Dana options. I need tall tires on the rear to match the low profile tires that I will install on the Firestone 19.5" that I am running on the front.
The Dana 70 was a very easy swap.
The Dana 70 was a very easy swap.
#21
10-07-2013, 10:26 PM
I got the 4:10 Dana 70 out of a '69 F350 and it came with 16.5" stud piloted wheels, poor tire selections. I found 16" stud piloted wheels and have a better selection of tall tire sizing. From what I've learned, the Sterling with hub pilot would have been a better, same cost, choice. Perhaps research would have given me other Dana options. I need tall tires on the rear to match the low profile tires that I will install on the Firestone 19.5" that I am running on the front.
The Dana 70 was a very easy swap.
The Dana 70 was a very easy swap.
#22
10-07-2013, 10:27 PM
Posting Guru
I m looking at putting x10. 10x22.5 tires on it ? Would that get me closer to 60 mph?
#23
10-07-2013, 10:34 PM
Abe, I have to disagree about the F6- F600, the two speed rear does not add a higher gearing, it adds a lower than granny gear. The F-5 came with either a 5.83 or a 5.14 (which is what I have) The F6 2 speeds were 5.83/8.11 or 6.33/8.81. So the F6 will give you more low end pulling power, but the same, and in most cases lower highway speeds.
#24
10-07-2013, 10:43 PM
That would give you approx 40" diameter, so at 3200 RPM it would give you about 65MPH. To run 60, you would be at about a much safer 2975 RPM. Of course you do realize how rare both the wheels (need a 22.5 x at least 7" 5 lug) and that tire size are?
#27
10-08-2013, 12:35 PM
Thread
Thread Starter
Forum
Replies
Last Post
pheasantfarmer
1948 - 1956 F1, F100 & Larger F-Series Trucks
55
06-22-2011 11:43 PM
blockerboyscustoms
1948 - 1956 F1, F100 & Larger F-Series Trucks
21
02-18-2009 11:08 AM