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- - Speedo Gear box (https://67-72chevytrucks.com/vboard/showthread.php?t=720702)

Sandtrap9072

10-21-2016 02:42 PM

Speedo Gear box

1 Attachment(s)

Can anyone provide any info about the circled gear box that is attached to the tcase? Mine currently does not have one. I was just wondering if it was necessary to have. Any info would be greatly appreciated!:gmc2:

geezer#99

10-21-2016 02:51 PM

Re: Speedo Gear box

Called a ratio adaptor.
Easy way to true your speedometer.
Needed!!
Sometimes.
Change tire sizes or gears you might need one.
Some here along with calculators.
https://transmissioncenter.net/shop/

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