I'm interested in running my NP205 fulltime in 4x4 even on pavement. I know this will cause problems with binding. Any solutions out there to run a NP 205 fulltime 4x4 on pavement?
CK5
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NP 205 run Full time 4x4
- Thread starter wazzabie
- Start date
BlazerBoyK5
1/2 ton status
why do you want to run it all the time?
Around here there can be ice/snow and bare pavement on the roads. So it does not make sence to unlock the 4x4 on pavement when in a few miles I could be on snow.. a few miles later back on pavement.
I now the NP203 can run fulltime 4x4 on pavement. Interested if it is posible to have the NP 205 run fulltime 4x4 on pavement.
I now the NP203 can run fulltime 4x4 on pavement. Interested if it is posible to have the NP 205 run fulltime 4x4 on pavement.
fmstruck
1/2 ton status
There's no differential between front and rear like a 203. It will drive wierd. Why not just leave the hubs locked in and shift the tcase in and out on the fly?
I would rather have it be fulltime 4x4.
BlazerBoyK5
1/2 ton status
I see. I was curious why you would want to leave it in for all the time. Down here there isnt alot of ice on our roads so i never have that problem.
Like fmstruck said, the only way i can think of doing it either leaving it in 4x high all the time or just shift on the fly. I dont think the 205 does that very well but the 208 will.
The NP 205 was never designed to run fulltime 4x4 on pavement for extended periods.
The NP 203 is only a fulltime case.. unless it was converted after market.
Once I get this running again I might swap out the NP 205 and place in the NP 203.
When I ran the NP 203 before the 2x4 conversion it would tear up tires really bad on pavement. I don't care so much about that cuz it is not going to be a daily commuter.
The NP 203 is only a fulltime case.. unless it was converted after market.
Once I get this running again I might swap out the NP 205 and place in the NP 203.
When I ran the NP 203 before the 2x4 conversion it would tear up tires really bad on pavement. I don't care so much about that cuz it is not going to be a daily commuter.
there is now way to make a 205 a "full time" case.
NP203's have a "Dif" in the 4 Hi and and 4 Lo postions and as such it sends power to the wheels with the least amount of traction. If you remove the either drive shaft while the case is Lo or HI the truck will not move.
Now In Hi-Loc or Lo-Loc the center differential is locked together so equal power is sent to both front and rear regardless of traction .
when you convert a NP203 you eliminate that "dif" and it acts just like a conventional "part" time Case
The NP 205 is a part time case meaning your in 2-wheel or your in 4-wheel.
Leave the hubs locked in and shift from 4-hi to 2-hi as needed otherwise drivetrain damage may result.
NP203's have a "Dif" in the 4 Hi and and 4 Lo postions and as such it sends power to the wheels with the least amount of traction. If you remove the either drive shaft while the case is Lo or HI the truck will not move.
Now In Hi-Loc or Lo-Loc the center differential is locked together so equal power is sent to both front and rear regardless of traction .
when you convert a NP203 you eliminate that "dif" and it acts just like a conventional "part" time Case
The NP 205 is a part time case meaning your in 2-wheel or your in 4-wheel.
Leave the hubs locked in and shift from 4-hi to 2-hi as needed otherwise drivetrain damage may result.
Not on dry pavement, On snow or Ice sure you bet you could.
you cant run a NP203 In either of the "LOC" positions for extended periods on dry pavement either though.
Why are you so set on leaving in it 4-hi ??? it litterally takes 2 seconds to shift between 4-hi and 2-hi
From a theoretical standpoint, as long as your front and rear axles are turning at exactly same speed, you'd be okay.
Now, if one of your tires happens to be a slightly different diameter than the others ... or heaven forbid, you wanted to TURN the truck, then you're in deep doodoo. The axles are then trying to spin at different speeds, but the transfer case gears are locking them together.
Yes, the axle differentials will absorb most of the difference, but you'll still be applying a fair amount of torque delta to the t-case.
If you really wanted to leave the T-case in 4-hi, the only option is to unlock the front hubs (at which point you're in 2WD); otherwise you will break something eventually.
If you want full-time 4WD, you should be using an NP203 with the center diff open (i.e. without an internal part-time kit.)
-- A
You are in Washington, not Antartica. You don't need full time four wheel drive. Leave the hubs locked, and shift it into 4 High when you need 4 wheel drive.
Martin
Martin
chulisohombre
1/2 ton status
when i used to daily drive my blaZer in winter,i used to leave the 205 in 4 high all the time.never had a problem in the snow or pavement in the winter.you cant have lockers in either diff though as it will spin you out pretty bad in snow when they lock up.with open diffs i didnt have any problem leaving it in 4 high.
you ran it in 4-hi on dry pavement??
I DD'd a 76 K20 all winter here in alaska we have glare Ice for about 4-5 months and I only put my truck in 4-wheel drive 5 or 6 times and that was when there was fresh snow on top of the ice . get a good all season tire and learn to drive theres no need to run in 4x4 that much it wastes gas and wears out equipment faster
I DD'd a 76 K20 all winter here in alaska we have glare Ice for about 4-5 months and I only put my truck in 4-wheel drive 5 or 6 times and that was when there was fresh snow on top of the ice . get a good all season tire and learn to drive theres no need to run in 4x4 that much it wastes gas and wears out equipment faster
Wow. You're the opposite of what everyone else is doing. Where everyone else has a 203, they want to swap to a 205 to get away from the 203 which has a bad rep to it.
Oh well, to each his own. I'd rather lock the hubs in and only shift into 4wd when it needs it.
Oh well, to each his own. I'd rather lock the hubs in and only shift into 4wd when it needs it.
chulisohombre
1/2 ton status
i only did this in winter because of snowdrifts and ice popping up in between dry pavement in the mountains. i live dead center of the poconos and i did mostly mountain driving to go snowboarding and to work on snowy backroads.if it had been nice for a couple of days and i knew the roads were fine with no snow or ice i would go back to 2 wheel.i didnt have anything wear out or brake or use much more gas than i did in 2 wheel either.i get 8 to 10 mph whether in 2 wheel or 4 wheel.i just didnt drive much over 45 when locked in 4 high.like him i didnt want to have to pull over if i hit a bad spot.if the roads are crap,it was just easier to already be in 4 wheel if you hit bad pavement.you dont have to worry about losing traction,then thinking you should have already been in 4 wheel.it is the way i drive.everyone will have their own opinions and driving styles.he asked 4 opinions and if anyone ever did this with no problems.i am one of those people.i did the same when i lived in alaska.
ciffer
1/2 ton status
is washington state really that much worse than minnesota? i made it through all of last year without using 4 wheel on road. which includes plenty of snow and ice.
resurrected_jimmy
1/2 ton status
Subaru makes a great on road 4 wheel drive 
85-m1028
1/2 ton status
The Hmmwv uses a good full time case. the 242 has a lower 2.72 ratio and is rated for a 1 1/4 ton vehicle. I don't know what it would take adapt it 
just a thought..
just a thought..
