On a 1998 or newer (and since we're taking about a 4.7, it's a '00 or
newer), a change in rear-end ratio does not require areprogram, as the
speed sensor is on the axle and not the driveshaft. Only tire size changes
need a reprogram.
TonyC wrote:
> 3.92 is a readily available ratio. The computer can be reset by the
> dealer to correct the odometer/speedo readings meaning you don't need a
> speedo black box unless you're running really odd tire sizes.
>
> TonyC
>
> -----Original Message-----
> From: kwreimer <kwreimer@email.msn.com>
> To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
> Date: Sunday, October 28, 2001 9:12 AM
> Subject: DML: Re: axle ratio
>
>
>>Can 3:70 be obtained? if so this may be better, still close to the 3:55
>>but a little quicker of the line with the 3:70 or 3:90's, the 3:90 will be
>>ok i have thought about going to these myself, i have a 2K dak with 3:55
>>limited slip now. I like the 3:55, but would be nicer to be quicker off
>>the line. the RPM change should be minor, only around 200-300 RPM More.
>>----- Original Message -----
>>From: "DML" <gwbower@hotmail.com>
>>To: <dakota-truck-moderator@bent.twistedbits.net>
>>Sent: Saturday, October 27, 2001 9:27 PM
>>Subject: DML: axle ratio
>>
>>
>>> Anyone drive a 4.7 with a 3.92 axel ratio? If so how is the performance
> at
>>> highway speeds. what is rpm at 70mph (or even 80mph if you go that
>>> fast). gas milage? I am trying to decide what ratio to get with a truck
>>> I am
>>going
>>> to order when my present truck sells.
>>>
>>>
>>>
>>
>>
-- -andy andylevy@yahoo.com Maintainer, DML FAQ - http://www.dakota-truck.net/faq/ http://home.twcny.rr.com/andylevy/dakota/ '99 CC 4x4 318 auto
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