tdskip Posted October 3, 2016 Report Share Posted October 3, 2016 Good morning - hope everyone had a good weekend and got some driving / wrenching in. I am curious about gearbox options on the SR20DE engine I picked up, it came with a 71C 5 speed. Basically I am looking to see if a bolt-on 5 speed that is not quite as long is readily available. I am a total Datsun/Nissan newbie so thanks for the patience, and as a reminder this is going into a (cough, cough) non-Datsun. I believe that a Z trans will bolt on but am not sure. I have to fabricate a driveshaft anyway so no newbie there... Thanks! Quote Link to comment
datzenmike Posted October 3, 2016 Report Share Posted October 3, 2016 '84- 300zx non turbo might work but it's not any shorter I think. I'll check but after '86 or so the 71C was dropped for a different one.FS5R30A? (I think, and will check) If you want shorter get one (71C) from a 2wd D-21 Hardbody. Any KA engine should do but again, the early VG30 may as well but was changed later for an FS5R30A? same as the 300zx non turbo. They are around 30 " long. Swap your SR front case on it. Not sure what the gearing ratios are. 1 Quote Link to comment
tdskip Posted October 3, 2016 Author Report Share Posted October 3, 2016 Thanks Mike - doing more research here I am wondering if I can more simply deal with the shifter position by making something like this for the top linkage while keeping everything else (shifter kit from Summit Racing B&M Pro Ripper Shifters 45070 for TKO gearboxes but you get the idea) Quote Link to comment
G-Duax Posted October 3, 2016 Report Share Posted October 3, 2016 Your image didn't load...... Quote Link to comment
tdskip Posted October 3, 2016 Author Report Share Posted October 3, 2016 Let's try this image - sorry about that. Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 Why not just use the trans that came with it . It's stronger newer and parts are more available . Quote Link to comment
tdskip Posted October 3, 2016 Author Report Share Posted October 3, 2016 Why not just use the transfer that came with it . It's stronger newer and parts are more available . Good morning, it is longer than ideal and shifter mount is too far back BUT I think I can address the shifter via a fabricated shifter set up like above. I am hoping to use it... Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 What is this going in to ? Quote Link to comment
tdskip Posted October 3, 2016 Author Report Share Posted October 3, 2016 Hi - this (old picture); 1 Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 Ooooo neat Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 Makes me wonder if you could swap the bell housing from the 71c to a short tail 720 4x4 5 speed Quote Link to comment
Lockleaf Posted October 3, 2016 Report Share Posted October 3, 2016 Yes you could, though you may have to deal with the differing bearing sizes at the front. What advantage would this give you? They are oriented identically. Starter position? Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 He wants a shorter trans due to shifter position Quote Link to comment
Lockleaf Posted October 3, 2016 Report Share Posted October 3, 2016 I know what he wants, i meant you. 71c sits the same as the 720, so what advantage so you seek? Edit: my mind instantly placed the 71c behind a ka, not an sr. Sorry, I'm slow. Only downsides would be no speedometer pinion outlet, and the gearing may not be optimal. Quote Link to comment
datzenmike Posted October 3, 2016 Report Share Posted October 3, 2016 The 720 had a weaker 71B in it. Quote Link to comment
tdskip Posted October 3, 2016 Author Report Share Posted October 3, 2016 Thanks for the notes guys - appreciate the schooling. For a 160 hp engine am I looking at gearbox strength issues with any of these? Don't think so but wanted to ask. Quote Link to comment
datzenmike Posted October 3, 2016 Report Share Posted October 3, 2016 It comes with a 71C so get another 71C that is shorter. Quote Link to comment
DISLEXICDIME Posted October 3, 2016 Report Share Posted October 3, 2016 There is a shorter 71c? Quote Link to comment
datzenmike Posted October 4, 2016 Report Share Posted October 4, 2016 Well the S13/14 is 4-5" longer than the one in the Hardbody. 1 Quote Link to comment
spriso Posted October 4, 2016 Report Share Posted October 4, 2016 I put a SR20DE bellhousing on a 71C from a KA24E powered truck for my wife's 1964 Datsun 1500 Fairlady project-- it worked out perfectly-- this is the only shot I have with it being mocked up in the trans tunnel. It is 3" shorter (?) than the standard SR RWD trans. Michael 1 Quote Link to comment
datzenmike Posted October 4, 2016 Report Share Posted October 4, 2016 What was the over all length? Quote Link to comment
tdskip Posted October 4, 2016 Author Report Share Posted October 4, 2016 Great discussion - thanks for all of the info and ideas. Hope this helps people in the future via search. Looks like the shorter version is the way to go. Now the question of where to track a pickup version down? Quote Link to comment
Stoffregen Motorsports Posted October 4, 2016 Report Share Posted October 4, 2016 Is that a TR4 or a TR250? Either way, it will be a major improvement over the stock engine. Quote Link to comment
G-Duax Posted October 4, 2016 Report Share Posted October 4, 2016 Just getting rid of the John Lucas (prince of darkness) electrical will be a big improvement :) Great reading, from here: http://www3.telus.net/bc_triumph_registry/smoke.htm Quote Link to comment
tdskip Posted October 4, 2016 Author Report Share Posted October 4, 2016 Ha - yes, I have let the smoke out on occasion! Got the engine fitted today - only had to the battery tray area by two inches (non-structural and I was going to relocate the battery back to the trunk anyway). It looks like the existing, longer gearbox, may still work. I need to reattach it to the engine and take one more set of measurements. Thanks again for the help and encouragement - I mentioned this forum to one of the guys at the workshop where I am doing this and he said "Oh, yeah, those guys are great". I agree. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.