Jump to content

Differential Issues (720 pick-up)

Recommended Posts

Hello Guys,


I'm new inside the fascinating nissan 720 world and here is the thing,

Recently I've got myself a nissan 720 4x4 1984 model, but the rear diff makes an horrible noise

the question is, Can I swap a 1986 720 2wd rear diff to my 1984 4wd truck? The thing is where I live there are no many options to get

a rear diff besides this '86 truck.

I would really appreciate your help.

Thanks in advance.

  • Like 1

Share this post

Link to post

Best thing will be find a 4wd differential and swap it if that's where the problem is.


The 2wd truck will have the leaf spring mounts on the bottom of the axle housing, as opposed to the 4wd having the leaf spring mounts on top of the axle housing.


The pinion flange may be a different size, and the gear ratio will be likely be higher (3.7, 3.88, etc) vs the 4.11 you probably have from the factory. This will be a no-go since your rear axle ratio absolutely has to match your front diff ratio to avoid binding when in 4wd. You can check under your hood on the pass fender for the info plate. It will say axle or such and have the trans code then a code with two letters and two numbers. Mine is from my 84 4wd king cab parts truck and has the CA41 code which is 4.11 gears. 2EIXxfZ.jpg

Share this post

Link to post

Is the noise coming from the gears? If so, you can just swap the center section as long as the gear ratio is the same. Or swap it and don’t use the 4wd until you find the proper gear set.

  • Like 1

Share this post

Link to post

First of all check the oil level, it may just be low and filling it may reduce the noise.



4x4 after Oct.'82 use a 4.11 C-200 Salisbury differential, the 2wd use an H-190 third member with nothing above 3.90 two totally different axles.



Drain the differential and remove the cover plate. If making enough noise to hear it may also be visible that something's wrong.

  • Like 2

Share this post

Link to post

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.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

By using this site, you agree to our Terms of Use.