What's new
  • If you registered but have not received your email confirmation check your Spam folder. If it's not there please Contact Us and let us know your username.

fs5w71 2wd to 4wd conversion

dentedsub

Haberdasher
Joined
Jun 2, 2020
Member Number
1767
Messages
102
Location
Close but no cigar
Can I swap the rear housing from a 4wd nissan transmission to a 2wd. I searched around but couldn't find a clear answer. I am looking at a truck that is in great shape and low miles but 4th gear is gone. 4wd trannys behind ka24 are kinda rare, not to mention junk yard around here are dying, so I want to see how hard it would be to just swap the rear half of the housing over. Would the output shaft need swapped too?
 

bgaidan

Red Skull Member
Joined
Jul 18, 2020
Member Number
2322
Messages
1,726
Can I swap the rear housing from a 4wd nissan transmission to a 2wd. I searched around but couldn't find a clear answer. I am looking at a truck that is in great shape and low miles but 4th gear is gone. 4wd trannys behind ka24 are kinda rare, not to mention junk yard around here are dying, so I want to see how hard it would be to just swap the rear half of the housing over. Would the output shaft need swapped too?

On the V6 you can just cut the output shaft down and everything else is the same. I've never had the 4-banger one apart so I can't say for sure. I suspect it's the same or very similar.
 

Wtf.kia

New member
Joined
May 29, 2021
Member Number
3986
Messages
1
I have a 4banger 4x4 tranny apart right now. If u want some pics let me know I'll shoot you some
 

Attachments

  • 20210522_160818.jpg
    20210522_160818.jpg
    2 MB · Views: 13

dentedsub

Haberdasher
Joined
Jun 2, 2020
Member Number
1767
Messages
102
Location
Close but no cigar
So I pulled the trigger on a different truck that I probably paid too much for. Thought the trans was just stuck in nuetral. After I pulled it I realized the redneck I got it from had ran it dry until the input bearing grenaded. So I'm on the hunt for another unless it can be fixed. After some research I don't think I like the idea of swapping tail housings. The 4wd trans has wider ratios with lower first and reverse and might have bigger bearings.
DSCN9457.JPG
DSCN9458.JPG
 

bgaidan

Red Skull Member
Joined
Jul 18, 2020
Member Number
2322
Messages
1,726
I didn't think they were different ratios, but just checked a '94 FSM and sure enough, they are. 3.321vs 3.985 is pretty substantial too. Also surprised that the 4wd holds twice as much fluid.

1623326493664.png



Where are you located? You should be able to use any 4cy trans from '86 hardboddies to '04 Frontier/xTerra. Looking at car-part.com, there are several early ones starting in the $300 range.
 

bgaidan

Red Skull Member
Joined
Jul 18, 2020
Member Number
2322
Messages
1,726
You got me curious and I started checking various years that I could find info on. Apparently the Frontier and X 4cyls got a slightly higher ratio than the earlier D21 models. Kind of in the middle of the 4wd D21 and all other 2wd ones.


So a D21 transmission in a later D22 would be a decent upgrade. You'd just have to swap bellhousings to keep the crank position sensor.

1623329820584.png
 
IH Parts America - CPT Crawler Proven Technology

Register to get rid of these ads:

Register to get rid of this ad:

Top