The 3.90's are an excellent choice for the 3.9L's. (Especially
automatics and 4x4's.)
With 32" or taller, Motive-Gear 4.10's (that's what I switched out to
and don't have any problems on the highway either with them.)
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
[mailto:owner-dakota-truck@buffnet.net] On Behalf Of Sevrence, Sean
(S.J.)
Sent: Tuesday, July 10, 2001 7:10 AM
To: 'dakota-truck@buffnet.net'
Subject: DML: RE: Gearing size question
Hey Mike!
You will notice that the engine is at a lower RPM at the same speed due
to the increased diameter of the tires. The wheels also weigh more. The
combination of these two things will account for a slower accelerating
time. If you pull anything, I would change out the gears. If you don't,
let them be and try it out. The 3.9L can handle it, I don't know about
the automatic. The automatic seams to shift just as you enter the torque
range (around 3,500 has been my experience). This then takes your RPM's
down to 2,500ish. The 3.9L really needs to run in the torque to get up
and go. I would get run over trying to pull out in traffic here in the
Detroit area (thankfully only during working hours!). That was why I
choose the manual so I could keep it in the torque by shifting at 4,500
which takes me back to 3,500....still in the torque.
I do not mean to start anything between the auto and man transmissions.
The traffic around me require that I can get out of the way while
entering the streets (mostly boulevards around here - divided streets
with turnarounds aka Michigan Left Turns ;) ).
Give the 3.92s a try and let us know what you think based on your needs.
Sean
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