There is actually a "gear" on the end of that sensor to connect it to
the output shaft of the transmission and you change the "gear" to make
the sensor send signals at a different rate to the JTEC and on to the
speedo itself. There hasn't been a "speedo cable" connected to that gear
for a number of years. For anyone thats interested, drop by the parts
counter the next time you're at the Dodge dealer and they have a
"blow-up" on the parts computer of the related components. Also, the
Dak's have a separate category in the parts computer for "speedo pinion
gears", and if the parts guy isn't familiar with the setup, he'll look
under "Transmission" and "Differential" and tell you that there are no
"speedo pinion gears" available...
Craig
-----Original Message-----
From: Vincent Heckathorn [mailto:victorylane@iwaynet.net]
Sent: September 20, 1998 11:30 PM
To: dakota-truck@buffnet.net
Subject: Re: Adjusting speedometer Was: RE:DML: Goodyear dealer says
"Tir es have no mileage warranty"
FWIW
My 98 dakota does not have a speedo gear, It has a speedo sensor where
the
gear would be. I would think that we should be able to get different
sensors for adjusting the speedo when changing gears and or tire size's.
Colin H
Craig Baltzer wrote:
> The dealer can use the DRB to adjust the speedo for any of the "stock"
> tire sizes. For a Durango (and prob. the Dak), these are 235/75/15 and
> the 31x10.5" (or outter diameters of 28.878" and 31"). Other than
that,
> they have to change speedo pinion gears, and there are about 8 sizes
> available for those. What still seems up for debate is if you can get
> away with just changing the speedo pinion gears if you have ABS. There
> is some vague wording in the factory service manual that says the JTEC
> looks at both the ABS sensor speed, and the reading that its getting
> from the transmission speed sensor and compares them. Since there is
no
> "ABS pinion gear", its unclear what happens...
>
> Craig
>
> -----Original Message-----
> From: jim miller [mailto:jmiller@texnet.net]
> Sent: September 20, 1998 3:30 PM
> To: dakota-truck@buffnet.net
> Subject: Re: Adjusting speedometer Was: RE:DML: Goodyear dealer says
> "Tires have no mileage warranty"
>
> > Speedo should be able to be adjusted by any local Dodge
> > dealer.
> > Can the speedometer be adjusted for tire changes? If so, does
anyone
> > know how much it can be adjusted? (i.e. is there enough "play" in
> there
> > to adjust for something like a rearend ratio change?)
> >
> > -Jon-
> >
>
> I took my 98 Dak to the dealer for a spedo adjust and they tried but
> there are only
> a few step type adjustments available and he could not get mine right.
> I put on
> larger diameter tires than the computer listed so my spedo still reads
> about 3 mph
> slow at 60 mph.
> Jim in Waco
> 98 RC V8 Auto P275 60X15 tires on 15X8 factory rims
> Waiting on 99 R/T
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