Cascade Crew

miamivice

Still searching for the piece(s) I need to get the Trans hooked up and back together...Are either of these what I need? (this is for my 82 w/ a mechanical speedometer cable)

http://cgi.ebay.com/ebaymotors/700R4-SPEEDOMETER-INSERT-GEAR-42-TOOTH-TH350-GM_W0QQcmdZViewItemQQcategoryZ33727QQihZ018QQitemZ280192501275QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/700R4-SPEEDOMETER-GEAR-SLEEVE-GEAR-39-TOOTH-TH350_W0QQcmdZViewItemQQcategoryZ33727QQihZ018QQitemZ280192504711QQrdZ1QQsspagenameZWDVW

the 'hole':

...and a little more info...my rear end is a 293

Quasi-Traction · Posted: Sun Jan 20, 2008 4:20 pm Post subject:

are you sure its not a 2.73 fish?

did you pop the diff cover and look at the ring gear? GM gears have numbers. Formula for figuring the gear ratio is pretty simple.

The gear will usually Say "GM 11:41" or "GM (insert part number) 11:41"

What the equasion comes out to is this 41 ring teeth/11 pinion teeth=3.727272 = 3.73 rear ratio.

miamivice · Posted: Sun Jan 20, 2008 4:54 pm Post subject:

chevymad · Posted: Sun Jan 20, 2008 5:13 pm Post subject:

Those are the proper bullets. But you need to know how many teeth that plastic gear in the trans has, and exactly what your rear end ratio is, and the size of your tires. Once you have all this there are online calculators to tell you how many teeth the driven gear needs to have.