Bill Pitz wrote:
> On Mon, 27 Oct 2003 17:35:15 -0500, andy-dml@levyclan.us (andy levy)
> wrote:
>
>
>>BARRY OLIVER wrote:
>>
>>
>>>Uh, on my visor it says (no kidding) than I should be moving (in
>>>neutral) at 5-10 mph in order to shift into 4-lo...
>>
>>My '99 said something like "no faster than 3 MPH, and put the tranny in
>>Neutral." Can't speak for anyone else but if I'm on anything but a
>>downhill paved surface I come to a stop from 3 MPH real fast with the
>>tranny in N.
>
>
> Ok, so I checked out my visor and the owners manual. On my 2000
> (NV231), the visor doesn't say anything about how to shift (just that
> you should consult the owners manual). So I did.
>
> What they describe sounds extremely retarded to me...
<snip>
>
> I don't see how you can possibly keep your vehicle rolling at 2 to 3
> mph and do all of those things before your vehicle comes to a stop (or
> is going way faster if you're going down a hill). Not to mention that
> you'd really need 4-LO in a situation where you're stuck or in thick
> mud or something else that's going to slow you down a lot quicker than
> a nice paved road.
Exactly my point above.
> My book also says that you can use 4LO at up to
> 25mph.
First off, if you need 4LO, no chance you can safely be doing 25.
Second, if you can safely do 25, you'll probably rip up the drivetrain.
And third, do the math on the RPMs. A 31" tire turns 650 times per
mile. Multiply by rear end (let's use 3.92:1), the transfer case
(2.72:1), and we'll be real generous and figure you're in 3rd gear
(1:1). That results in 6930 engine revolutions per mile. At 30 MPH,
that's 3500 RPM and just think about all the torque you're punishing the
drive components with. If you're in 1st gear (2.74:1 on a 46RE), you're
doing 19,000 engine revs per mile, or 9500 RPM at 30 MPH (only slightly
less for 25MPH, and not even in the same timezone as your redline).
> Oh well... my way (stop, foot on brake, tranny in neutral, shift 2wd
> -> N [pause 1-2 seconds] -> 4-LO , tranny in gear, go) works fine for
> me.
I always was at a full stop with my '99 when I went into 4LO. Got into
4HI while rolling, then stopped, put the tranny in N, and pulled the
lever right to 4LO nonstop.
-- -andyhttp://home.twcny.rr.com/andylevy/dakota - andy-dml@levyclan.us -------------------------------------------- "Whatever Adam does, do the opposite and you'll be fine" -Bob Tom --------------------------------------------
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