Gas mileage is between 15-16 w/ the 3.92's. Yes, I do have a bed cover. Unfortunately, the aerodynamics I gained was negated by the 125# it weighs (it's fiberglass). I have never towed anything and rarely haul anything heavy. 1st gear is pretty deep w/ the 5 spds (NV3500), so I wuld think that acceleration from a stand still should still be ok w/ the 3.21's.
Alex
On Fri, 26 Apr 2002 07:51:03 -0400 "Sevrence, Sean (S.J.)" <ssevrenc@visteon.com> wrote:
Good Morning Alex!
I have a couple questions for you. What is your current gas mileage? Do you
have any bed cover? I gained 1.5mpg simply with adding my tonneau cover.
Just something to consider.
How often do you load up the back end (750+ lbs)? Do you ever pull anything?
I currently have the 3.92 gears in my '01. Off the line is very simple with
this gearing. I rarely use 1st. On the other hand, the 3.55 gear in the V6
has difficulty accelerating while pulling a 1200lbs. pop-up camper. I have
never had the 3.55 gears with a V8, but if you do any pulling I would not go
below the 3.55's. The 3.21 are really tall. HTH!
Sean
'92 RC Sport 3.9L 5spd - 250,000mi!
'01 CC SLT+ 4.7L 5spd 3.92 LSD Mobil-1 - 40,700mi!
http://www.twistedbits.net/WWWProfile/dakota/DnuuSncssJujU
-----Original Message-----
From: Alex Ross [mailto:blackdak@mindspring.com]
Sent: Thursday, April 25, 2002 7:36 PM
To: Dakota Mailing List
Subject: DML: opinion on 3.21 gears
I am trying to decide if I want to change my 3.92's to 3.55's or 3.21's.
Anybody out there have 3.21's in a V8? What do you think of them? Are they
too high? I mostly do interstate/highway driving. I figure 3.55's would drop
me about 250 rpm @ 75 mph while 3.21's would drop me about 475 rpm. I'm
doing about 2600 rpm @ 75 mph right now with approximately 28" (255/55/17)
tires.
Alex
97 CC Sport V8 5spd
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