Vss

[oldcarstulsa]

i know that the 03 4l60 use a 40 tooth ring for the sensor, what is the pulse rate of the 08 4l60, i hooked my speedometer up like i did with the early tran, it reads all crazy, so i guess it is a different pulse. thank you

[RedHeartbeat]

not exactly sure because there are two pulse sensors in a newer 60e, one on the input drum shaft and the other on the output. I'm sure its probably a count of both pulses added together if there isn't a second pickup point

[oldcarstulsa]

any ideal what to do to make the speedometer work, i am using the speedometer out of a 91 suburban, worked on my 03 motors but not this one.

[pcmcobra]

that's weird...on my 06 setup speedo works fine hooked up to my 91 burb cluster.
Let us know what you find out.

[GasGuzzler]

The input sensor on the newer 60 is mostly just for component slipping diagnostics. They still all read VSS off the back one only.

[oldcarstulsa]

i did find out the vss is still the same pulse, as th 03 , but when looking at the wiring in the helms manual, it shows the veh speed signal as wire 817 at the instrument cluster which is dark green/white, which is the correct color, but out of the ecm it shows the vehicle speed signal as 1827 which is a yellow/black wire, that is the only wire that I have, and it makes the speedometer go crazy, it pegs out then goes to zero, if you put the truck in reverse, it starts running miles on the speedometer like your doing 100 miles a hour, guess i might need to get a adj drac and see if changing the setting will make a differece. just shooting in the dark now, really have no clue as to what to do. will let you know if get it right

[aussie]

ive just changed from a 700r4 to a 98 4l60e in my 78 c10 this is going to sound silly but where is this VSS located on the trans

[RedHeartbeat]

it is on the output shaft housing.

[aussie]

ok does it look like the speedo drive coz there is a round green plug thats on the case i thought it was the vss ???