Need help I.D. transmission
#1
Need help I.D. transmission
Hey guys, I need help finding out what kind of transmission I have. I'm not the original owner so I dont know what he did to this. The problem started when I found the VSS unhooked. I hooked it up and ran the car. The speedometer seemed to read almost twice as my actual speed, it also makes the odometer run quicker. So I took out the VSS and went to autozone to get a new one. Supposedly, my year only offered mechanical VSS while the one I pulled out was electronically operated.
I cannot find any VSS for my vehicle that looks like the one that I pulled out. Maybe if I find what my transmission is I can find the right one.
I cannot find any VSS for my vehicle that looks like the one that I pulled out. Maybe if I find what my transmission is I can find the right one.
#2
It's a Tremec 3650, TR-3650-3-TCET1789 to be exact--standard fare for the '01-1/2 through '04 model years.
Your car came with a Tremec T-45 which sends 6 pulses per output shaft rotation, the 3650 sends 12 pulses/rev. To fix it you will need to get a Dallas SpeedCal, or something similar--the universal speedoDRD ($70) should also work, I use one of these on my bike.
Your car came with a Tremec T-45 which sends 6 pulses per output shaft rotation, the 3650 sends 12 pulses/rev. To fix it you will need to get a Dallas SpeedCal, or something similar--the universal speedoDRD ($70) should also work, I use one of these on my bike.
#4
The speedoDRD could handle that in it's ratio mode.
#7
With a bit of late night research I found that the speedometer on your '98 expects 8000 pulses per mile (ppm) from the output shaft sensor (OSS) on the transmission. This bit of information lets us validate the error--which is always nice.
As stated above your '98 speedometer expects 8000 ppm. However the 3650 sensor outputs 12 pulses per output shaft revolution, and as the tires turn 810 revs/mile and the final drive gears are 3.27:1, this makes the output pulses per mile for the 3650 equal:
810 * 3.27 * 12 = 31784 ppm.
Since this is 3.97 times faster (31784 / 8000) than the 8000 ppm expected by the speedometer, it reads 3.97 times fast making 5 mph in your driveway display as 5 * 3.97 = 19.9 mph.
The SpeedCal (or speedoDRD) can fix it.
As stated above your '98 speedometer expects 8000 ppm. However the 3650 sensor outputs 12 pulses per output shaft revolution, and as the tires turn 810 revs/mile and the final drive gears are 3.27:1, this makes the output pulses per mile for the 3650 equal:
810 * 3.27 * 12 = 31784 ppm.
Since this is 3.97 times faster (31784 / 8000) than the 8000 ppm expected by the speedometer, it reads 3.97 times fast making 5 mph in your driveway display as 5 * 3.97 = 19.9 mph.
The SpeedCal (or speedoDRD) can fix it.
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