thanks.
NP271 opinions
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NP271 opinions
What's the thoughts and experiences on the NP271 transfer case that Fords putting in the F250-F550. Maybe someone want's to make a poll. Any failures? Is is a chain drive or gear drive unit?
Tony
Tony
Mountain Pass
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NP271 opinions
It's the largest T-case that new venture gear makes. At least for pick-ups. I don't know if they make them for big trucks or not. It is a chain drive case rated for a GVW rating of 17,500 lbs. It has a max capacity torque of 7890 lbs and weighs in at 120 lbs. You can compare different model cases by the model number. The "2" means two speed. The "7" is the strength. 7 is the highest and in case you're wondering, they use a 241 or 241HD is a dodge truck. The "1"is the type of t-case. 1 is part time 4wd while the 3 for the trucks with esof means it is electrically shifted. 271 case for trucks with manual 4x4 and 273 for the trucks with the esof.
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NP271 opinions
well, i just thought about what i just asked and remember that my truck is sitting right outside! so i got iff my lazy butt and looked myself. its got 272 gear ratio. but is that 2:72, or 27:2, or is it 272:1??? im just confused now
-nathan
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NP271 opinions
Yep, that is good info on their numbering system. It sounds like the 271 is a winner. Why is there so much hoopla about the 205 'rockcrusher' and if the middle number is the strength rating, what is the 0 and 5? Anyhow, my original thoughts are to find a 271 and put it in place of a BW1356 that is in my F350. Drivetrain.com wants the same price for a rebuilt 271 as they do a rebuilt 1356. I'd have to have a transfer case mount though, and I'm not sure about splines and other items. Any help or input? The 271 sounds invincible in regular use.
Tony
Tony
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NP271 opinions
i never knew of it to break down like that? thought that if you had a 271 transfercase ment you had a low range ratio of a .271 to 1. you sound like you have researched already but what does it mean if you have a new process 205 transfercase? a low ratio of .205 to one? or a two speed transfercase with a strength rateing of zero? i will agree that it was not a very strong transfercase? guess i could have been thinking wrong all these years but just wondering?
parts man
parts man
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NP271 opinions
Aren't new process and new venture different companies? That wouyld explain the differences.
The np205 is regarded as the strongest case ever, and its gear driven, unlike the NV 271/273 chain drive.
The np205 is regarded as the strongest case ever, and its gear driven, unlike the NV 271/273 chain drive.
Sit. Stay.
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NP271 opinions
[updated:LAST EDITED ON 07-Feb-02 AT 11:16 PM (EST)]>Aren't new process and new venture different companies? That
>would explain the differences.
You know I was actually wondering about the title of this topic for that very reason. The transfer case in the present SD's a New Venture Gear transfer case. The title asks about NP271. (What I assumed to be a New Process.) I thought it was just a typo on his (TonyG) part.
So wouldn't stand to reason that our (F250-F550) transfer cases are actually labelled NVG-271 (& NVG-273 for us ESOF guys)and not NP271?
I am far from an expert in transfer cases and their manufacturers but I do believe New Process and New Venture are different companies.
>would explain the differences.
You know I was actually wondering about the title of this topic for that very reason. The transfer case in the present SD's a New Venture Gear transfer case. The title asks about NP271. (What I assumed to be a New Process.) I thought it was just a typo on his (TonyG) part.
So wouldn't stand to reason that our (F250-F550) transfer cases are actually labelled NVG-271 (& NVG-273 for us ESOF guys)and not NP271?
I am far from an expert in transfer cases and their manufacturers but I do believe New Process and New Venture are different companies.
Mountain Pass
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NP271 opinions
Yes, they have a 2.72:1 low range. 4H is of course 1:1 The numbering system may and I'm guessing it is different on the NP205. Although, the 205 has a 1.96:1 low range so what the numbers stand for, I don't know. I don't know too much about the older cases. The NP205 is a New Process t-case whereas ours is a New Venture t-case. New Process is a division of New Venture but I think they use to be separate.
In some of the 99 super duties ford did have some problems with the 271. The shift forks were wearing causing it to go into neutral. That problem seems to have been fixed and I haven't heard have anyone else having any problems with them.
In some of the 99 super duties ford did have some problems with the 271. The shift forks were wearing causing it to go into neutral. That problem seems to have been fixed and I haven't heard have anyone else having any problems with them.
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NP271 opinions
New Venture was formed when GM and Chrysler decided to work together to design and build transmissions in the mid 90's (hence the name, it was a "new venture" since most large corporate companies usually refused to work together). They bought and now own New Process Gear and Muncie, both older companies.
I believe the old New Process t-case numbers are sequential, and not indicative of the type or strength of the unit:
NP203: full time, chain drive, cast iron, heavy duty, 2.00:1 low
NP205: part time, gear drive, cast iron, heavy duty, 1.98:1 low
NP207: part time, chain drive, aluminum, light duty, 2.61:1 low
NP208: part time, chain drive, aluminum, med. duty, 2.61:1 low
weldman is right, the 205 is a brute of a t-case.
I believe the old New Process t-case numbers are sequential, and not indicative of the type or strength of the unit:
NP203: full time, chain drive, cast iron, heavy duty, 2.00:1 low
NP205: part time, gear drive, cast iron, heavy duty, 1.98:1 low
NP207: part time, chain drive, aluminum, light duty, 2.61:1 low
NP208: part time, chain drive, aluminum, med. duty, 2.61:1 low
weldman is right, the 205 is a brute of a t-case.
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NP271 opinions
What were the 205's used in? Meaning what did they come in stock.? Would a 205 geardrive be a suitable upgrade over a 1356 or would it be better to go with a 271? Would either be easier to swap in?
Thanks to all the TC experts or experienced ones.
Tony
Thanks to all the TC experts or experienced ones.
Tony