Editing Z31/speedopinion php (section)

=== Speedometer Pinion Gear Table ===

Pinion gears are color-coded and matched to differential ratios. For gears with
'''20+ teeth''', an offset sleeve is required. Not using it may damage both
the pinion and transmission drive gear.

| # Teeth | Color | Differential Ratio | Part Number |
|---|---|---|---|
| 16 | Yellow | 3.36 |
|

84–86 Turbo

[https://www.nissanpartsdeal.com/parts/nissan-pinion-speedo~32703-78101.html?vin=&make=Nissan&model=300ZX&year=1984&submodel=&extra1=&extra2=&filter=( 32703-78101])84–87 NA, 87–89 Turbo

[https://www.nissanpartsdeal.com/parts/nissan-pinion-speedo~32703-78102.html?vin=&make=Nissan&model=300ZX&year=1984&submodel=&extra1=&extra2=&filter=( 32703-78102])88–89 NA

[https://www.nissanpartsdeal.com/parts/nissan-assy-pinion-19t~32703-78103.html?vin=&make=Nissan&model=300ZX&year=1984&submodel=&extra1=&extra2=&filter=( 32703-78103])[https://www.nissanpartsdeal.com/parts/nissan-pinion-speedo~32703-78104.html?vin=&make=Nissan&model=300ZX&year=1984&submodel=&extra1=&extra2=&filter=( 32703-78104])[https://www.thezstore.com/product/7387/new-factory-21-tooth-speedometer-pinion-assembly-80-89-280zx-300zx-z31-w-manual-trans 32702-58S21]
* [https://nismoparts.nissanusa.com/parts/nismo-sleeve-speedometer-pinion-3270758s00?c=bD01Jm49RHluYW1pYyBTRU8gUGFnZQ%3D%3D 32707-58S00]## Modification Examples

'''Scenario:''' You bought an aftermarket 4.11 differential
because you’re shooting for 12’s on stock fuel. You don’t mind the high revs,
but your speedometer now reads too high, and your odometer is racking up miles too quickly.

'''Solution:''' Order the 20-tooth (Red) pinion gear
and install it into your transmission. Viola! Your speedo is accurate again.

'''Scenario:''' You swapped a T5 transmission (84–86 Turbo)
into your ’86 NA after your original transmission blew.
The T5 came with a 3.54 differential, meaning the pinion gear is
a 17-tooth (Black).

'''Problem:''' Your NA’s differential is 3.70,
which requires an 18-tooth (Blue) pinion gear.

'''Solution:''' Conveniently, the correct 18-tooth gear
can be taken from your old NA transmission and installed in the T5.