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Discussion Starter · #1 ·
I left work today, speedometer not working and no over drive. I have had problems before with no od but not the speedo. I fixed the plug to the tps (info from this site) and have been shifting into od just fine. This came out of nowhere. It did one other time but the speedo came right back. '92 250 cummins auto, 358,0000 miles and runnin strong. Any help appreciated!!
 

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overdrive doesent work unless the speedo works. this happened on my truck and it was the speed sensor which is mounted on the tailshaft of the transmission. hope this helps.
 

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hey

if your truck has a ratio gear box for the speedo .. its mostly that i have changed mine a few times.
 

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Had the same exact problem with my son's 1992. Replaced the Variable Speed Sensor (VSS) about $70.00 out the door at the Dodge dealer. Works like new.
 

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I left work today, speedometer not working and no over drive. I have had problems before with no od but not the speedo. I fixed the plug to the tps (info from this site) and have been shifting into od just fine. This came out of nowhere. It did one other time but the speedo came right back. '92 250 cummins auto, 358,0000 miles and runnin strong. Any help appreciated!!
do your daylight runns work?????????? i no weird question but it maybe the link to the answer
 

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What???? Would you explain what you are talking about?
if your daylight runs work , that means your vss is working and the signal is getting to the ecu , witch rules out some things. could mean your ecu is not working right.
 

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What are daylight runs are you talking about day time running lights are trucks dont have these do they?? Never saw one that does!!! Or are you talking about something else????
 

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all mine do .. my 89 gas truck did and so do my 3 1993"s
 

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its the little box right beside were the air box should be ... i think it has 10 wires that go in to it
 

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do the trucks in the USA not have drl day time running light ?????????????
 

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Canadian trucks all had daytime running lights. Once the truck had any forward motion they would come on.
 

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winkdemon84 ... No, in the US dodge did not have daytime running lights at that time. Only the Canadian trucks.
 

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no no its my bad ,,, the USA trucks don't hAVE them i thought they would .... but another thing to check would does your truck had a gear ratio box for the speed it would be right under the vss on the t-case or trany
 

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have u get it working again ?????
 
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