tried the programmer again that didn't help. i think it is in the sensor my wife told me when it happened she was backing up quick and she heard the tires chirp. so maybe it could be the sensor in the rear end. if you agree please tell me what the part is called. and i will swap it out after i get it and see if it works. the tire size r about stock 265-75-16 are what i have stock is 225-75-16 i don't think there is a problem with that but i am not sure

 

Standard Motor Producsts - Speed Sensor - 2001 Dodge Ram Pickup
see web site for pictures. http://www.standardbrand.com/web_app...ccatalog.asp#p

SC104 Output Sensor for Transmission Control Module
ALS203 Vehicle Speed Sensor,w/ A.T.,Mounted on Rear Axle
ALS2 4WD,Vehicle Speed Sensor,w/ M.T.,w/ ABS,Mounted on Rear Axle
ALS203 2WD,Vehicle Speed Sensor,w/ M.T.,w/ ABS,Mounted on Rear Axle
ALS100 Vehicle Speed Sensor,w/ M.T.,w/o ABS,Mounted on Rear Axle

 

OK got all the sensors finally and changed them didn't work what else is there

OK just in case

the truck speed reads some were like 100-110 when doing about 55-60 around there. It takes a min to get back to 0 when i stop.A lot longer than before. i am getting another sensor from napa for the rear end to see if maybe i just got a bad one.

and i found little metal shaving on the tail shaft sensor! should i be worried?

thanks for all the help

 

OK tried all sensors and still no luck what am i to do? please any more help would be great

new sensors and i even reprogrammed the truck 4 or 5 time with the hyper-tech

all the gauges work

i dont know what else to do

 

The sensor in the diff actually is a magnet, just like the crank position sensor. Not sure about the one in the tranny but I'd bet it's the same. If there's loose metal, it'll stick to it and it's possible it's giving you afalse reading.

I just looked back about 3 posts and noticed you said the stock tires were 265x75x16.Is that what was listed on the sicker on the driver's side door frame? It really sounds like your pcm has got the wrong tire size programmed.The 225's are 29.3 inches (set the programmer to 29.25") and the 265's are 31.6" (set the programmer to 31.5"). Those sizes aren't that far apart to cause an amazing difference.

I would return the truck to stock by removing the hypertech program, thenreset the pcm by disconnecting the battery for a few minutes, then take it for a drive and see if the truck is reading at least somewhat normal. This will let you know if it's a programmer issue or a truck issue. It's possible the programmer got interupted while it was adjusting the speedo and went wonky on you. Hopefully it has a clean copy of the stock pcm program in it's memory.

 

stock now and still wrong speed. its no as bad as first with the new sensors but still of 70 is 55mph i dont know what to do i am going to program it to 31.5 and see if that helps

thanks for all the help and if anyone knows anything else it could be let me know please

 

i used the hypertech and put the tire size to 31.25 and that really helped its only like 4 or 5 mph off thanks for the help aim4squirrels

i never used the tire thing before so i didn't want to mess things up but your info worked for me so thanks a million

 

keep adjusting your tire size by 1/4 inch increments with the hypertech and you can nail it dead on.