pstlouis 20 #1 Posted August 5, 2014 How do I properly id an 8pinion rear end?, I have a c160 and a c141 I've thought about messing with, but I don't want to get crazy without a good rear. They do both have 1 1/8 axle shafts, but is there more to check for? Share this post Link to post Share on other sites
Jake Kuhn 1,555 #2 Posted August 5, 2014 I'be been told if you jack the rear end up and spin the wheels, if they turn the oposite direction it is a 8 or if they turn the same direction it is the 10 pinion. 1 Share this post Link to post Share on other sites
stevasaurus 22,717 #3 Posted August 5, 2014 Jake is correct. If you think that the transmissions are original on your horses...the C-160 has he #5091 trans and the C-141 has the #103916 trans. They are basically the same...1 1/8" axles, 8 pinion, 8 speed. If you had 1" axles, it would be a 4 pinion differential. The 10 pinion "limited slip" differential is not even an option in your horses. Doing what Jake said would prove it. 1 Share this post Link to post Share on other sites
pstlouis 20 #4 Posted August 5, 2014 Thanks guys. I will check them out tonight. Share this post Link to post Share on other sites
Ed Kennell 38,137 #5 Posted August 5, 2014 So.... which rear is preferred for pulling ? Share this post Link to post Share on other sites
pstlouis 20 #6 Posted August 5, 2014 You definatly want the 8 pinion/8spd rear. The 4s just won't hold up, and the 10limited slip are useless on the track. Share this post Link to post Share on other sites
