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jon
Dodge Dakota
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10/10/2005
21:34:18

Subject: speed sensor
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i need to replace the speed sensor in my 99 3.9l so where would i find it and how would i replace it and will it be hard?



CluCool
Dodge Dakota
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10/10/2005
22:37:41

RE: speed sensor
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I had mine replaced by a mechanic apparently there are two of them and they throw out the same code when they go bad so you cant tell which one is bad and i guess you need to replace both of them to be sure? It cost about 150 to do it and i never got my hands dirty. I didn't get my wallet fatter either, or learn anything, but that is all i can tell you.



intensedak39
*GenIII*
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10/10/2005
23:00:08

RE: speed sensor
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you do not have to replace both of them..

only one actually checks speed, the other is there as part of a loop. If your speedometer doesnt work until 20-30 mph and/or your have a ABS light on and/or your Brake light on, you need to replace the VSS located on top of the differential.

it's about a $35-50 piece and is very easy to replace... just one bolt and a wiring harness.



toolfan
Dodge Dakota
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10/10/2005
23:03:37

RE: speed sensor
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one is on the rear diff right on the pumpkin. not sure of the other.



GB2000
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10/11/2005
02:34:40

RE: speed sensor
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The other is around your torque converter...behind the transmission bellhouse. Just follow the bellhousing back...you'll see it. It's a little thing threaded into the metal attached to a little wire harness. Easier to find than to describe. I had to change it on my truck...cost like $28 at Autozone I think and took about 5 minutes to change. Forewarning...when you unplug it, it's gonna dump tranny fluid all over your head if you're directly underneath it.

The symptoms I had were...Check Engine Light and tranny shifted funny. It would hang up in first gear and you'd have to let off the gas to get it to shift and it shifted weird after that but wouldn't necessarily hang up...just shifted earlier than normal and stuff like that.





Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!

GB2000
GenIII
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10/11/2005
02:36:03

RE: speed sensor
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*bellhousING... I can't type tonight. If that's the one you need to change, you can prolly get one of the guys at the auto parts store to describe it better or even show you. Otherwise post back and I'm sure I could prolly take a pic for you or something.





Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!

Jeff
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10/11/2005
04:43:55

RE: speed sensor
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"Forewarning...when you unplug it, it's gonna dump tranny fluid all over your head if you're directly underneath it."

hahahahah

good advice
;)


Jeff
'99 3.9 clubcab

GB2000
GenIII
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10/11/2005
04:49:56

RE: speed sensor
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I figured I'd tell him since when I was told how to do it, I wasn't warned...and yes, I had tranny fluid dumped all over me. I expected SOME to come out, but not THAT much all at once. lol





Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!

intensedak39
*GenIII*
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10/11/2005
13:22:09

RE: speed sensor
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josh, the second one is not in the bellhousing, it's in the tailshaft on the drivers side



jon
Dodge Dakota
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10/11/2005
13:47:25

RE: speed sensor
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yeah mine does that i have to let off the gas for it to shift in first so weres it located at and how do i change it out? so ill probably need to get more tranny fluid to right? did you let all your tranny fluid drain out?




daddio
Dodge Dakota
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10/11/2005
13:54:26

RE: speed sensor
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it's on the tail of the tranny. you probably won't lose more than a quart if you don't leave that hole open too long. or you could back up an incline and you probably wouldn't lose any fluid.



intensedak39
*GenIII*
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10/11/2005
14:10:38

RE: speed sensor
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jon,

if yours is doing the syptoms i mentioned above, you need to replace the VSS that is located on top of the differential. One bolt, one wiring harness... easy... no loss of fluid.





GB2000
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10/11/2005
14:31:57

RE: speed sensor
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I meant it was BEHIND the bellhousing...but thanks. I couldn't remember what it's actual location was called. Tailshaft...noted.

If it's not the sensor Intense is talking about it's the one on the...tailshaft.

I just took this pic. Sorry it's not real helpful, but it's hard to lay underneath my truck (after it's been raining) and take a pic from under there while trying to pull my entire body underneath because THAT'S when all the cars decide to come down the street. The black object on the right is the tranny pan...as you go towards the left side of the pic, you're heading straight back towards the back of the truck. The sensor's prolly about a foot straight back from the tranny pan. It's circled in red.







Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!

intensedak39
*GenIII*
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10/11/2005
14:41:44

RE: speed sensor
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lol... i'm still trying to figure out what i'm looking at in your pic josh.. haha







GB2000
GenIII
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10/11/2005
22:44:43

RE: speed sensor
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lol...sorry. Blame the two cars who decided to come down the road while I had my legs hanging out in the middle of the street. I was curled up in the fetal position while trying to snap that pic. =P





Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!

michael mello
Dodge Dakota
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2/19/2006
21:44:56

RE: speed sensor
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I have a 99 dakota, manual tranny, I understand speed sensor is on rear diff, and one on tranny,
but where on a manual tranny is the speed sensor located,, I understand the one on the rear diff is for abs, but where is the one on the tranny (manual trans) please help,,,
signed,,, disgruntled in Florida,,, thank you



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