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gelcoat
Dodge Dakota
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7/22/2004
08:20:05
|
 Subject: speed sensor
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Message:
1999 dakota/3.9L / 2wd
p0720/code I replaced the speed sensor in the rearend. Still have promblem. Is there another output speed sensor or can I check wiring/ fuse?
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mddak
Dodge Dakota
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7/22/2004
08:37:34
|  TPS, ABS, SPEED sensor
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Message:
thought I would summarize the threads
diagnostic:
--check engine lite = tranny speed sensor
--abs + brake lite + speedo weird = diff abs sensor
--cruise surges = TPS sensor on trottle body
helpful hint - if you're replaceing the tranny speed sensor, park it with the rear uphill or the rear wheels raised - so your tranny fluid don't come out ( have autozone check trouble lite)
mddak
7/08/2004
17:06:33
RE: ABS and BRAKE light on
Message:
just did rear abs sensor - problem solved, some hints for a 99 dak
- day before spray nut with wd40 or liquid wrench
- drive rear wheels up ramps (or steep driveway, helps keep diff fluid from leaking out, also chock wheels!)
- disconnect neg battery teminal
- top nut 13 MM use box wrench
- bottom nut 14 MM use box wrench
- press connect with thumb and pull connector off sensor
- wiggle sensor up, put screw driver under lip and wiggle to raise (carefully)
- dip finger in hole and put diff oil on new O ring on sensor
- push sensor in and bolt up (also, use dielectric grease for the wire connector)
- put ignition key in and turn to on position for 30 seconds
- reconnect battery
the reason you put the key to the on position is to clear the trouble lite and reset the PCM.
you're done
_______________________________________________
Note: Check the wrench sizes, I've seen that some people use 1/2" and 9/16" (which are close to 13mm and 14mm). Not sure if the nuts are metric or not.
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mddak
Dodge Dakota
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7/22/2004
08:43:40
| more info
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hope the above post helps and some more info::
--the speed sensor is the fat screw in plug at the rear of the tranny. autozone $ 25
--the ABS sensor is on top of the differential. dealer $40
--the TPS sensor is on the side of the trottle body. autozone $ 20
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another mark
Dodge Dakota
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7/22/2004
13:39:47
| RE: speed sensor
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Message:
great instructions
there are also 2 front wheel speed sensors in our system, just so
you know
they sure like sensors on these trucks huh
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IntenseDak39
*GenIII*
7/22/2004
17:25:54
| RE: speed sensor
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Message:
the abs sensor in the rear diff is also the speed sensor.
it uses a ring gear on the carrier to determine your speed. That is why your speedo messes up when your ABS sensor goes bad.
the sensor in the tranny is just a "check" and doesnt measure speed.
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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mddak
Dodge Dakota
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7/22/2004
18:37:17
| RE: speed sensor
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Message:
intense you're right - I just used the names they're called by in the parts listing
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mddak
Dodge Dakota
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7/22/2004
18:49:47
| RE: speed sensor
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Message:
by the way - honda has the same problems with sensors just like all the other cars out there. We are not alone...
It's not too bad if we can fix it ourselves and keep the dealers out of it.
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dakota_99
Dodge Dakota
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7/25/2004
01:39:45
| RE: speed sensor
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Message:
When speedo acts weird? do you mean that it wont read until one reaches 30+ mph? I have the ABS & Brake light with the speedo problem as described. Just wondering?
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IntenseDak39
*GenIII*
7/25/2004
12:08:00
| RE: speed sensor
IP: Logged
Message:
that would be it..
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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dakota_99
Dodge Dakota
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7/25/2004
14:56:35
| RE: speed sensor
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Message:
Cool Beans.... Thanks
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Marks Golam
Dodge Dakota
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7/27/2004
21:16:23
| RE: speed sensor
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Mark:
They sure do, hyuck, hyuck, hyuck. You post just to see your name. Oh, ami wrong? Sorry that was indeed a powerful contribution that will win you praise and alll shall seek thy wisdom.
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oilerzman
Dodge Dakota
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8/13/2004
18:42:16
| RE: speed sensor
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Message:
both check engine and brake light are on and no speedo problems...? the cruise sometimes is off about 5 mph, but only when uphill so that seems right. any thoughts which sensor?
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Daksport
Dodge Dakota
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8/16/2004
09:07:34
| RE: speed sensor
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Message:
What if you dont have abs brakes? Does this speed sensor still exist or do anything? Thanks
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tim
Dodge Dakota
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12/17/2004
09:07:57
| RE: speed sensor
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Message:
I have all of the above problems. Check engine, ABS, Brake lights all on. Speedo doesn't work at all, ODO doesn't work at all, Cruise doesn't work at all. I have replaced the speed sensor on the rear of the tranny with no help. So I guess I should check the one on the rear diff. Right? Or is there another problem somewhere else.
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daddio
Dodge Dakota
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12/17/2004
09:57:26
| RE: speed sensor
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Message:
definitely change the one on the diff. that should fix it.
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tim
Dodge Dakota
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12/17/2004
10:36:02
| RE: speed sensor
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Message:
Thanks for the info. Thats the sensor that I can only get from the dealer, correct?
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tim
Dodge Dakota
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12/17/2004
15:45:30
|  RE: speed sensor
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Message:
That did the trick. Thanks a lot. The speed sensor on the Rear diff was bad. I got a new one from the dealer for $36. Put it in in like 5 minutes and now I am good to go.
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daddio
Dodge Dakota
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12/17/2004
17:13:38
| RE: speed sensor
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Message:
glad to hear it!
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John Lam
Dodge Dakota
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12/17/2004
21:37:04
| RE: speed sensor
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Message:
p0720/code
I'm getting this code also. trying to look up tranny speed sensor on the autozone website but can't find it. anybody know what the proper part name is so I can get it?
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dakota_99
Dodge Dakota
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12/17/2004
21:45:20
| RE: speed sensor
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Message:
think it's a dealer part... not sure but that's where i got mine
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tim
Dodge Dakota
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12/18/2004
11:33:51
| RE: speed sensor
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Message:
The one thats on the rear of the transmission is just called the speed sensor at autozone. Thats the only one they carry. Its about 24 bucks. I replaced that one first but it didn't clear the problem. The one on the Rear diff did the trick.
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