Zed Head Posted November 2, 2015 Share #13 Posted November 2, 2015 (edited) You can change cruising speed with a different differential. On that topic though, be aware that 1975 has an odd bolt pattern on the differential. So if you do swap differentials, you'll need to get a 76-78 propeller shaft (center driveshaft). Or swap pinion flanges. On the wheels - it's tire diameter that matters. A "normal" 14 wheel can have the same diameter as a 16" wheel with a low profile tire. http://www.discounttire.com/dtcs/infoTireMath.do On transmissions - many people focus on cruise but they should really focus on 1st gear. Edited November 2, 2015 by Zed Head Link to comment https://www.classiczcars.com/topic/52755-75-z-want-to-swap-my-4-speed-for-a-5-speed-best-option/?page=2#findComment-480360 Share on other sites More sharing options...
Taxelson Posted November 2, 2015 Author Share #14 Posted November 2, 2015 Zed, good point on the tire diameter. Thanks Link to comment https://www.classiczcars.com/topic/52755-75-z-want-to-swap-my-4-speed-for-a-5-speed-best-option/?page=2#findComment-480366 Share on other sites More sharing options...
SteveJ Posted November 2, 2015 Share #15 Posted November 2, 2015 Mud,Thanks, that link didn't work, what's the name of the book, I'll get it ASAP. I'm on the hunt for an 5 speed. I think part of the reason I'm looking at a 5 speed, the car I bought has 14" wheels, maybe it would be a more comfortable RPM at cruising speed with some 16" wheels, right? I think I'll buy the rims, tires first, then see how comfortable the cruising speed is. Sound good everyoneTry this link: http://www.amazon.com/Rebuild-Your-Nissan-Datsun-Engine/dp/1931128030/ref=sr_1_1?ie=UTF8&qid=1446502999&sr=8-1&keywords=how+to+rebuild+your+nissan+ohc 1 Link to comment https://www.classiczcars.com/topic/52755-75-z-want-to-swap-my-4-speed-for-a-5-speed-best-option/?page=2#findComment-480374 Share on other sites More sharing options...
Taxelson Posted November 2, 2015 Author Share #16 Posted November 2, 2015 Thanks, it's ordered, excellent.Troy Link to comment https://www.classiczcars.com/topic/52755-75-z-want-to-swap-my-4-speed-for-a-5-speed-best-option/?page=2#findComment-480377 Share on other sites More sharing options...
Bruce Palmer Posted November 3, 2015 Share #17 Posted November 3, 2015 Troy,Just to confirm what was stated here-in the help you can get here is far and away the best you can find anywhere on the web. Link to comment https://www.classiczcars.com/topic/52755-75-z-want-to-swap-my-4-speed-for-a-5-speed-best-option/?page=2#findComment-480387 Share on other sites More sharing options...
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