adowns284

A friend has a 1989 Maxima with an automatic transmission with a non-working speedometer. I need the gear ratios for 4th (O.D.) and the final drive ratio so I can calculate the rpm for a given speed so she can use the tach as a temporary speedometer.

When the speedometer quit I replaced the speed sensor and the speedometer immediately started working. I tested the old speed sensor and it put out voltage pulses when I rotated its shaft. So it was probably good. Now the speedometer stopped working again. Any ideas? Bad connection? Anyone had a similar problem?

Thanks for any help.

Alan

GXEMAX

1st=2.79
2nd=1.55
3rd=1
OD=.7
Final=3.64
Hope this helps.....

MrGone

iTrader: (30)

Probably a bad connection. I know of 2 89 (both SE's though) where the speedo would do funny stuff (match the tach, not work, etc). I replaced the speedos and neither have had a problem since.

If you would like, I have a spare GXE gauge cluster off of a 93 pm me if your interested

ke5adb

Was curious about the ratios myself, thanks GXEMAX

Loe max

iTrader: (6)

VG auto's (1989-1991 SE,1989-1994 GXE)

Gear Ratio's
1st = 2.785
2nd = 1.545
3rd = 1.000
4th = 0.695
Reverse = 2.272
Final drive ratio = 3.642


MPH=(5,950rpm X 12.75) / (2.785 X 3.642 X 168)

MPH= 75862.5 / 1704.01896

MPH= 44.52mph@5,950rpm in 1st gear
MPH/1,000rpm= 7.48mph

MPH= 75862.5 / (1.545 X 3.642 X 168)

MPH= 75862.5 / 945.31752

MPH=80.25mph@5,950rpm in 2nd gear
MPH/1,000rpm=13.49mph

MPH=75862.5 / (1.00 X 3.642 X 168)

MPH=75862.5 / 611.856

MPH=123.99mph@5,950rpm in 3rd gear**
MPH/1,000rpm=20.84

MPH=75862.5 / (.695 X 3.642 X 168)

MPH=75862.5 / 425.24

MPH=178.40mph@5,950rpm in 4th gear ***
MPH/1,000rpm=29.98mph