Cummins Swap
Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
After a brief google search I came up with this.
http://www.fordcummins.com/80-ford-c...-overview.html
http://www.fordcummins.com/80-ford-c...-overview.html
Thread Starter
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Mountain Pass
Joined: Feb 2002
Posts: 243
Likes: 1
From: Houston USA
fellro86,
Interesting, so you used a NV4500 WITH a gear vendors overdrive? Wow, so the 4500 didn't have enough overdrive with the 4.10 ratio? I wouldn't worry about this in my case, because I have a 3.55.
Interesting, so you used a NV4500 WITH a gear vendors overdrive? Wow, so the 4500 didn't have enough overdrive with the 4.10 ratio? I wouldn't worry about this in my case, because I have a 3.55.
Elder User
Joined: Jan 2006
Posts: 565
Likes: 0
I just saw an article on this, but it was a newer swap. I think it was in truck trend magazine or four wheeler. I know yours is an older swap, but I think you might be interested in the article, maybe get some ideas. They took a powerstroke diesel out of a F-350 and put a cummins. They even laid out what it cost to do the swap, of course that wouldn't apply to you.
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
I took out a 460 that had seen better days and put in the 460. I haven't run the NV4500 yet, but behind the 46RH automatic, the engine was spinning too fast. To run with traffic, it was spinning faster than it liked, and lost power on the hills. With the GV and the overdrive engaged, it would cruise easily down the highway at 70 with no real effort. I am wrapping up swapping to the NV4500. The truck was originally a 5 speed truck anyway, so it was a relatively easy swap back.
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Junior User
Joined: Jul 2004
Posts: 54
Likes: 1
From: Sioux Falls, SD
Love the Cummins engines. Highly recommend 4btswaps.com, there is no site like it on the net, the best archive of tech info and swap info you will ever find... Ever.
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Check out Destroked.com. I prefer them over fordcummins.
Even with 3.55's you may find you'll want more gear, I am gathering the components and planning the swap in my '86, however I am still undecided yet on how I'll go about gaining higher gearing.
With 3.55's, 31" tires, .76OD.
75MPH = 2194.097 RPM
70MPH = 2047.824 RPM
65MPH = 1901.551 RPM
60MPH = 1755.278 RPM
55MPH = 1609.005 RPM
Do you really want to cruise the hiways and biways at 55-60 MPH!
Personally the gear vendors unit is not for me, I dislike the fact that it's after the transfer case in 4x4's., IMO a poor design.
-Enjoy
fh : )_~
Even with 3.55's you may find you'll want more gear, I am gathering the components and planning the swap in my '86, however I am still undecided yet on how I'll go about gaining higher gearing.
With 3.55's, 31" tires, .76OD.
75MPH = 2194.097 RPM
70MPH = 2047.824 RPM
65MPH = 1901.551 RPM
60MPH = 1755.278 RPM
55MPH = 1609.005 RPM
Do you really want to cruise the hiways and biways at 55-60 MPH!
Personally the gear vendors unit is not for me, I dislike the fact that it's after the transfer case in 4x4's., IMO a poor design.
-Enjoy
fh : )_~
Thread Starter
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Mountain Pass
Joined: Feb 2002
Posts: 243
Likes: 1
From: Houston USA
I picked up a deal on a 91 Dodge 2500, truck was wrecked, owner just had injectors replaced and injector pump rebuilt. Engine purrs like a kitten, I could resist for $1200 for the whole truck. I will pick it up this weekend
Junior User
Joined: Jul 2004
Posts: 54
Likes: 1
From: Sioux Falls, SD
Check out Destroked.com. I prefer them over fordcummins.
Even with 3.55's you may find you'll want more gear, I am gathering the components and planning the swap in my '86, however I am still undecided yet on how I'll go about gaining higher gearing.
With 3.55's, 31" tires, .76OD.
75MPH = 2194.097 RPM
70MPH = 2047.824 RPM
65MPH = 1901.551 RPM
60MPH = 1755.278 RPM
55MPH = 1609.005 RPM
Do you really want to cruise the hiways and biways at 55-60 MPH!
Personally the gear vendors unit is not for me, I dislike the fact that it's after the transfer case in 4x4's., IMO a poor design.
-Enjoy
fh : )_~
Even with 3.55's you may find you'll want more gear, I am gathering the components and planning the swap in my '86, however I am still undecided yet on how I'll go about gaining higher gearing.
With 3.55's, 31" tires, .76OD.
75MPH = 2194.097 RPM
70MPH = 2047.824 RPM
65MPH = 1901.551 RPM
60MPH = 1755.278 RPM
55MPH = 1609.005 RPM
Do you really want to cruise the hiways and biways at 55-60 MPH!
Personally the gear vendors unit is not for me, I dislike the fact that it's after the transfer case in 4x4's., IMO a poor design.
-Enjoy
fh : )_~
Please clarify higher gearing for me will ya? Not sure I get your point.
Junior User
Joined: Jul 2004
Posts: 54
Likes: 1
From: Sioux Falls, SD
This is a heckuva deal IMO. The 91 model years had a mid to late year change for emissions, they added the intercooler, OD to the automatic transmissions and detuned the Injection system a bit. Is this truck you picked up intercooled or not?
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
The GV unit is standalone on the Dodge 2wd's. It came with the parts truck.While I understand the thing about putting the OD unit in front of the t-case, how often do you need OD in 4wd? The problem I see with US Gear being before the t-case is the fuel tank issue, as well as having to lengthen the front shaft, as well as shorten the rear...
Moderator
Joined: Jan 2001
Posts: 56,992
Likes: 2,741
From: Virginia
The GV unit is standalone on the Dodge 2wd's. It came with the parts truck.While I understand the thing about putting the OD unit in front of the t-case, how often do you need OD in 4wd? The problem I see with US Gear being before the t-case is the fuel tank issue, as well as having to lengthen the front shaft, as well as shorten the rear...
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Higher gearing = Less RPM at said MPH.
Higher gearing = More MPH at said RPM.
Higher gearing = 3.55 over the lower 4.10!
Higher gearing = OD over the lower DD.
Does that clear it up??
-Enjoy
fh : )_~