It won't be off at all. There is a sensor. It's not mechanical.
4.88's are IN!!
- Thread starter Psycho Mythic
- Start date
It won't be off at all. There is a sensor. It's not mechanical.
trussman
Active Member
The sensor is on the trans tail housing. So it doesn't know what the rear is doing right?
The sensor is in the rear end, it reads ring gear speed so changing gear doesn't affect it.
sensor in rearend is not for speedo ,its for your anti lock brakes ,your speedo wont change at all ,,
and for the on going discussion on 488,s i have always ran 305/45 /22 not the 40 stockers
so my rpm is not in anyone's math equation nananana boo boo
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505'sFastestViper.
Full Access Member
nope the speed is pulled from the front tires......too
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
sensor in rearend is not for speedo ,its for your anti lock brakes ,your speedo wont change at all ,,
and for the on going discussion on 488,s i have always ran 305/45 /22 not the 40 stockers
That make a world of difference! 45s are way taller than 40s
Psycho Mythic
Full Access Member
I topped 4th gear out to see, redline was right at 111mph, last month my trap speeds were 105mph at 13.2's with the 4.10's, so that gives me about 6 miles more hour of improvment with the 4.88's before im shifting to 5th, so I'm thinking easy 12's in the future just from my gear change.
Just piddling around to work and school I am LOVING the added pep :rock:
Just piddling around to work and school I am LOVING the added pep :rock:
Then why is my speedometer so far off with short tires on the rear?
This is true on most Chrysler vehicles (I didn't know it was that way on the '10 though). However, the input from the front wheels is used for stability control purposes, and is not input to the speedometer.
505'sFastestViper.
Full Access Member
Not true my truck did not have a sensor for the rear end and nothing coming off the trans and my speedometer still worked when we pulls the abs sensors in the front out the speedo stopped working
505'sFastestViper.
Full Access Member
Unplug your rear abs and sensor on the rear end and it should be correct
505'sFastestViper.
Full Access Member
Or it might be because you have your much shorter front lightweight wheels on
Good point. Justin, did you ever run the slicks with stock front wheels and see if the speedo was off?
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
I don't think we have an accurate answer to this question? I worked at dodge and remember countless trucks with abs light on and no speedo and it was the sensor in pumpkin of rear end every time!:dontknow:
I know the rear abs/speed signal is processed through the ABS module then on to the speedo.
3 sensors read tone rings, 2 on the front hubs and 1 on rear differential to control ABS. Module needs to know front and rear wheel speed to monitor and activate abs.
Pretty positive diffy sensor is responsible for speedo. Ever wonder why if in the rain or dry pavement if you smoke the tires down you can go 110-120 mph but the truck is not really moving but 3 mph? Power braking? Etc.:chain:
I know the rear abs/speed signal is processed through the ABS module then on to the speedo.
3 sensors read tone rings, 2 on the front hubs and 1 on rear differential to control ABS. Module needs to know front and rear wheel speed to monitor and activate abs.
Pretty positive diffy sensor is responsible for speedo. Ever wonder why if in the rain or dry pavement if you smoke the tires down you can go 110-120 mph but the truck is not really moving but 3 mph? Power braking? Etc.:chain:
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trussman
Active Member
I know what it is. it's a sensor in the valve stem. It's gotta be
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
I know what it is. it's a sensor in the valve stem. It's gotta be
Well.....technically those exist too, lmfao!
Measuring each wheels air pressure although we weren't blessed with that on our SRT10s
trussman
Active Member
Well.....technically those exist too, lmfao!
Measuring each wheels air pressure although we weren't blessed with that on our SRT10s
yeh I know bout the POS tire pressure sensors. I'm glad we don't have thos to be honest. I have a thing that is shaped much like a pencil that cost $2 and does the same thing.
VENOMOUS1 RACING
Has Left the Room - Banned from VTCOA!
Lol....right ! Whatever that thing is I've been using it for years
I'm a pro with that thang
+1!
I am soooo thankful we don't have TPMS on our trucks! :rock:Well.....technically those exist too, lmfao!
Measuring each wheels air pressure although we weren't blessed with that on our SRT10s
Psycho Mythic
Full Access Member
Its def not the front wheels, being that my speedo works on the dyno...
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