dross93ranger Posted July 8, 2011 Report Share Posted July 8, 2011 I have 2 521's, one has a tag under the hood that says J Motor, 67 HP, the other has the L16 and the transmission is bad. Can I swap the transmission from the J engine truck to the L16? If so what modifications are needed to do so? Quote Link to comment
datsunaholic Posted July 8, 2011 Report Share Posted July 8, 2011 Swap the cases. The transmission internals are similar (maybe a different gear ratio 1-2-3) but the front case, which includes the "bellhousing", is different. The splined shaft on the rear is different too, since the PL521 had a bolt-on flange, which may or may not be an issue. Quote Link to comment
ppeters914 Posted July 9, 2011 Report Share Posted July 9, 2011 Why not just get another L-motor trans? Quote Link to comment
bilzbobaggins Posted July 9, 2011 Report Share Posted July 9, 2011 Why not just get another L-motor trans? Cuz if Kentucky is like Georgia, its quite tough to find stuff! <_< I need to move out west where the toys are at! :D Jeff Quote Link to comment
dross93ranger Posted July 9, 2011 Author Report Share Posted July 9, 2011 Like he said it is hard to find Datsuns around here. I was just going to see if I could get by with what I have, but if not I will look for a 5 speed to bolt up. Any suggestions? Also I would like to get a 5 speed because this truck will see alot of highway time. Quote Link to comment
ppeters914 Posted July 9, 2011 Report Share Posted July 9, 2011 Like he said it is hard to find Datsuns around here. Yeah, I know, but seems easier to try and find an L trans so it's just a remove 'n' replace job rather than remove two trannies, strip, convert, etc. I was just going to see if I could get by with what I have, but if not I will look for a 5 speed to bolt up. Any suggestions? Also I would like to get a 5 speed because this truck will see alot of highway time. Gee, no one has -EVER- asked that question before. 1 Quote Link to comment
dross93ranger Posted July 9, 2011 Author Report Share Posted July 9, 2011 I have been searching, and I know the question has been answered, but all I am finding is people switching to L20B motors and transmissions, and people running a transmission out of a 78-79 200sx which is a pretty hard car to find in a junkyard around here. I am looking for other options. Quote Link to comment
datzenmike Posted July 9, 2011 Report Share Posted July 9, 2011 The most common L series 5 speed is the FS5W71B used in the truck, 280z and zx non turbo and the Maxima. Two things: 1/ The 5 spd. is over 5 " longer than yours so the driveshaft must be shortened. 2/ The rear transmission mount must be cut and welded in order to fit the 5 speed. 3/ Your driveshaft end has a flange that bolts to the output on your four speed. This won't work on the 5 speed so you will need the front driveshaft spline from a truck. This can be joined to your driveshaft at the U joint and then shortened to suit. (guess that was 3 things.) If another 521 4 speed is unavailable, the 4 speed from a 510 sedan or goon, early 620 before Oct '73 and the 710 4speed are close enough in length to work. You can use the flange off your broken 4 speed and plug the hole where the bolt is with a 40mm engine freeze plug to keep the oil in. I know this isn't a 5 speed but it's the easiest way to get back on the road. Quote Link to comment
ggzilla Posted July 9, 2011 Report Share Posted July 9, 2011 That 200SX is pretty rare around here too. Doesn't matter if you have L16 or L20B, the transmission swaps are the same. See Which 5-speed for 620? 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.