73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Scottcycle on June 14, 2012, 06:10:12 pm
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Hey guys. I'm new here and have a few questions. First off i have a 89 3+3 dually that i am installing a 700r4 into. It is just a driver so i don't need too much beef behind the motor which is stock. I need to swap spedo to a mechanical unit as that is what the truck is. I understand there are many different sizes of gears for the out put shaft and need help figuring out what ones i need. Is there a way to find out rear dif gearing without opening it up? Does anyone know where i could get spedo gears? Any help would be appreciated. Thx.
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If the rear end has not been changed and the rpo sticker is still in the glove box I'd say yes the info is available,
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The truck should have a electronic speedo, if so just get the adapter for the 700R4.