86 and 87 speedo the same?

[Esteban86K5]

I have an 86 speedo that looks like this

Will this fit in an 87 Blazer? I know the t-case changed so I thought the connections may have changed for the speedo cable too.

Anyone have some info for me?

THANKS!

 

[zcarczar]

86 and 87 have the same t-case, the only thing i dont know is about the fuel injection and the speed sensor in the speedo.

 

[85mudblazin]

I dont think the t-case changed until 89', they went to the 241 that has the mechanical speedo (only yr 241 with the mechanical speedo) all the later 241's had the electric speedo, so that speedo should work since both yrs would have the 208.

 

[Esteban86K5]

For some reason I thought the t-case changed the same year the carb went to TBI.

 

[dyeager535]

GM VSS is the same for all carbed apps from 1981-1990, and TBI C/K '87, R/V truck from '88-89. (think I have those years right...basically, old bodystyle trucks from '81-89 all use the same VSS/speedometer)

Only change regarding VSS was with the digital speedo's starting in 1990.