ok guys my cars all together and running (just about running) for the first time in a long ass time, well when i dropped the tranny in the firstplace i told my friend to disconnect the speedo cable but he didnt we dropped the tranny and goodbye speedo cable , but anywho i bought the new speedo cable/speedo gear/speed sensor, now my next question is how the f am i gonna get to the back of the speedo? is there any trick to this? and also the cars running like i said, but the idle is very very irratic it surges like crazy, i was told this would fix it... so is it true should the car run ok after i put this in? thanks in advance