Disengage 4WD?
kam3rad
Band Wagon
Does anyone know if it is ok to do everyday driving with 4WD disengaged? Is there any long term negative affect on the transfer case or viscous coupling? Helms said not to tow for more than 50 miles or go over 35 MPH with it disengaged. I looked in the 4WD drive sticky and nothing about it there.
Thanks.
Thanks.
Comments
Real-Time 4WD
Honda's Real-Time four wheel drive system is designed to provide the benefit of all wheel drive in slippery conditions, without the penalties of extra drag, higher fuel consumption, greater tyre wear and increased noise which accompany conventional four wheel drive systems in conditions when the extra traction is not needed.
The other benefit of Real Time 4WD is that its engagement is completely automatic - there are no extra levers or buttons, the system automatically engages drive to the rear wheels when it senses that the front tyres have started to slip.
The Real-Time 4WD system incorporates a compact transfer case which distributes drive to a propeller shaft which runs to the rear differential. There are also two hydraulic pumps, one driven by the front wheels, the other by the rear wheels. When the CR-V is operating on dry pavement, the front and rear wheels are turning at the same speed, and so are the two pumps. If the front wheels start to turn faster than the rear wheels (due to loss of traction), the pumps turn at different speeds. The resultant hydraulic pressure opens a valve body and feeds pressure to a multi-plate clutch, which engages the propeller shaft to the rear differential, thus feeding drive torque to the rear wheels. The amount of drive going to the rear wheels is proportional to the amount of front wheel slippage.
http://www.hondacivicwagon.com/board/viewtopic.php?t=8
If you still wanna disengage your 4wd for any reason , which wouldnt make sense to me, here you can find pictures from the manual to disengage it DIY style: http://hondacivicwagon.yuku.com/forum/viewtopic/id/463
Thanks again.
Its best to just leave it conneceted.
I know certain transmissions shouldn't be towed for long periods in nuetral and i think the same would apply for the wagon, especially if Honda/Helms mention it in the manual.
:? You misread the Helm's Manual.What you read refers to towing the disabled Wgn with either the front wheels or all 4 wheels on the ground that's why the 4WD sticker DID NOT mention it.
:arrow: It shouldn't be a prob running ''disengaged''.I'll get back to you later.Got to goto W
:? What's a CR-V in the definition :?:
Yeah I don't driving it with the 4wd disengaged would effect the car but it don't think it will impact the gas mileage. Maybe if you remove the driveshaft and viscous coupler all together ??? If you are looking for better mpg that might help since you are removing that 700 lb viscous coupler LOL
It used to say CRV RT4WD at the top i think its been edited a few times since it was posted.
is one of them
uhmmm...Civic - Recreational Vehicle
ahaa ... Can Run on Vapors
ohh ...
Contact Resistance Variation
as in "hydraulic fluid circulates between the two pumps; however, no pressure(read resistance) is generated.
leads to
-two hydraulic pumps that would turn at a different rate and hydraulic pressure proportional to the difference
in their speeds of rotation would be generated. The resulting hydraulic pressure opens a valve body and
feeds pressure to the multi-plate clutch, which engages the front propeller shaft to the rear differential.
The rear differential feeds the drive torque to the right and left rear wheels.
a.k.a.
Contact Resistance Variation
alas no funny remarks
: )
this should be Stickied
... whooops
: )
x2 :shock:
trust me, i am 8) hehe
I don't think there's any long term effect on the transfer case or VC.The only thing that happens when you disengage the 4Wd is the transfer bevel gear disengages from the rear shaft.It's like shifting into neutral .The only things in the VC are disc & oil.The thing I highly recommend you do is to change the oil in the Tranny & diff.I've seen too many blown 4WD trannies.It's probably not been changed in 100,000 miles.
The Honda description above I believe is about the newer CR-V not the EE Wgn. full-time 4WD.THere no hydraulic pumps in our EE Wgn. till later & that wasn't in the USDM models.
As far as more gas mileage.I don't think the mileage would jump much running in 2WD.Removing the drag from the tranny would be better than the drag @ the wheels,but it's still drag.Try it & let us know if the mpg go up.
I've been logging my mileage for quite a while on my 4WD wagon while varying things like tire pressure, gasoline types, etc. and making MS Excel plots.
Disconnecting the 4WD at the transmission did not change my MPG at all. Tire pressure and driving habits are much bigger variables.
With the 4WD connected, acceleration and handling is WAY different and better... specially with deep snow and/or slush. Also, in dry pavement and while making tight turns, the tires will drag a bit.
I will be taking the main shaft/coupler/rear-diff/axles out for cleaning and only then I might see a MPG increase.... I'd guess somewhere around 35 MPG.
Otherwise my lowest MPG was 22.6 during the worst of winter with long warmups and crazy snow driving and the highest MPG was 31.5 in summer with nice weather and conservative mixed driving.