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98 ram 1500 speed sensor question. #1719404 01/01/15 04:03 PM 01/01/15 04:03 PM
Joined: Dec 2007 Posts: 85 central illinois 6 65dodgebob OP member
65dodgebob OP member 6 Joined: Dec 2007 Posts: 85 central illinois	My 98 1500 keeps throwing a code for the output speed sensor. I have changed the one in the rear end housing, cleaned it out and put fresh gear lube in it. Still puts the check engine light on. Any ideas? ) I should mention the speedo is working fine. Truck has about 150 k miles. Last edited by 65dodgebob; 01/01/15 05:25 PM.

Re: 98 ram 1500 speed sensor question. [Re: 65dodgebob] #1719405 01/01/15 06:51 PM 01/01/15 06:51 PM
Joined: May 2003 Posts: 13,185 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,185 aZLiViN	perhaps the "output speed sensor" on the tailshaft of the trans.

Re: 98 ram 1500 speed sensor question. [Re: 65dodgebob] #1719406 01/01/15 06:58 PM 01/01/15 06:58 PM
Joined: May 2004 Posts: 752 North of the Motor City DartGTDan super stock
DartGTDan super stock Joined: May 2004 Posts: 752 North of the Motor City	If I remember correctly, the OSS is on the tail-end of the (automatic) transmission. 8381179-oss.png (53 downloads)

Re: 98 ram 1500 speed sensor question. [Re: DartGTDan] #1719407 01/02/15 01:55 AM 01/02/15 01:55 AM
Joined: Dec 2007 Posts: 85 central illinois 6 65dodgebob OP member
65dodgebob OP member 6 Joined: Dec 2007 Posts: 85 central illinois	Well ok then, looks like I was barking up the wrong tree! Thanks for the advice guys. I will try that.

Re: 98 ram 1500 speed sensor question. [Re: 65dodgebob] #1719408 01/02/15 11:03 PM 01/02/15 11:03 PM
Joined: May 2004 Posts: 752 North of the Motor City DartGTDan super stock
DartGTDan super stock Joined: May 2004 Posts: 752 North of the Motor City	As a test, you can swap the ISS (Input Speed Sensor) with the OSS (Output Speed Sensor). If the fault moves from OSS to ISS you have a bad sensor. If the fault remains the OSS you may need to look at the OSS wiring.

Re: 98 ram 1500 speed sensor question. [Re: DartGTDan] #1719409 01/02/15 11:32 PM 01/02/15 11:32 PM
Joined: Dec 2007 Posts: 85 central illinois 6 65dodgebob OP member
65dodgebob OP member 6 Joined: Dec 2007 Posts: 85 central illinois	ok,thanks. I will do that.

Re: 98 ram 1500 speed sensor question. [Re: DartGTDan] #1719410 01/03/15 05:21 AM 01/03/15 05:21 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: As a test, you can swap the ISS (Input Speed Sensor) with the OSS (Output Speed Sensor). If the fault moves from OSS to ISS you have a bad sensor. If the fault remains the OSS you may need to look at the OSS wiring. From what I remember that wont work as the threads are different on them. But what trans do you have the 46RE or is it a Hemi with the 45RFE ? The 46RE has a speed sensor in the overdrive housing thats just for the gov so the PCM knows the driveshaft road speed and it usually will shift funny when it goes bad since the PCM calculates gov pressure by it. The 46RE has no input sensor as it just controls gov pressure electronically. If its the 45RFE then it uses the input and output sensors so the controller knows the input shaft speed and the output shaft speed to control the solenoids for the electronic shift opperation as it needs to know eng rpm and input shaft speed rpm to calculte it with output shaft rpm to know when to shift. Ron

Re: 98 ram 1500 speed sensor question. [Re: 383man] #1719411 01/03/15 01:02 PM 01/03/15 01:02 PM
Joined: May 2003 Posts: 13,185 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,185 aZLiViN	No Hemi's in 98.... and NO input speed sensor on a 46RE trans which this truck will have...

Re: 98 ram 1500 speed sensor question. [Re: J_BODY] #1719412 01/03/15 03:09 PM 01/03/15 03:09 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: No Hemi's in 98.... and NO input speed sensor on a 46RE trans which this truck will have... Yea I been out of the dealer since 2011 and forgot what year the Hemi came on board. Has to do with old age or something. Ron

Re: 98 ram 1500 speed sensor question. [Re: 383man] #1719413 01/04/15 01:24 AM 01/04/15 01:24 AM
Joined: May 2003 Posts: 13,185 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,185 aZLiViN	Quote: Quote: No Hemi's in 98.... and NO input speed sensor on a 46RE trans which this truck will have... Yea I been out of the dealer since 2011 and forgot what year the Hemi came on board. Has to do with old age or something. Ron Keep thinking I should send you my old Autometer shift light.... I know you're going to forget to shift soon!

Re: 98 ram 1500 speed sensor question. [Re: J_BODY] #1719414 01/04/15 04:03 AM 01/04/15 04:03 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Quote: Quote: No Hemi's in 98.... and NO input speed sensor on a 46RE trans which this truck will have... Yea I been out of the dealer since 2011 and forgot what year the Hemi came on board. Has to do with old age or something. Ron Keep thinking I should send you my old Autometer shift light.... I know you're going to forget to shift soon! Now that is funny. As I dont have shift lite on my tach and 99% of the time I race I just shift by the sound and pull of the eng. Even with a tach I usually dont look at it when I shift as I normally will just look at the tach in the traps and on the line. You know I loved working as a tech all my life and for 24 years in the Dodge dealer I did my best to stay on top of all the Mopar tecnology and trying to be real good at what I did. But to be honest I dont miss the dealer hassle one bit as I said I loved what I did but I hated the politics of the pay system. And I dont have to worry about trying to know all the latest technology on the new Mopars. Its was a challenge staying on top of everything but its kinda a relief to not worry about it so much anymore. Ron Last edited by 383man; 01/04/15 04:07 AM.

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