Tranny swap

[Jeeperscreeper]

First post thanks for the add btw! Lol

 

Well I have a 90 mj 4.0 renix still auto 2wd. I want to make 4wd and I have a 92 yj 4.0 h.o auto 4x4 in my driveway I have been thinking of swaping the tranny and tcase over. Would this work or no? I don't really want to do the h.o swap as the mj is my daily and not really looking to make a huge project out of the gate but would like 4x4 back. Would these be interchangeable and only thing I would have to get is shafts? Or is wiring completely different?

[cruiser54]

Tranny is totally different. 

[Jeep Driver]

45 minutes ago, cruiser54 said:

Tranny is totally different. 

 

 

I think we may have to alter our vernacular. 

[Pete M]

the link in my sig should have info for swapping around automatic transmissions.   

[johnj92131]

Link in your signature did not show up till I signed in.  Anyone else notice this issue?

 

Using my cell phone's wifi hotspot with my laptop for internet access.

[Pete M]

I believe that's in the forum settings.  you'll need to sign in to view any signatures. 

[Jeeperscreeper]

8 hours ago, cruiser54 said:

Tranny is totally different. 

What would it take to work? Or is it not even worth it? Damn I was hoping for an easy one my first transmission swap lol

[hakukamana]

Your YJ if its an automatic is probably a 32RH. No electronics, a 3speed, and all hydraulic. The YJ transfer case is probably a NP231J.

The MJ automatics are AW4's, also there is a difference between the 2wd auto and the 4wd auto, transfer case could also be a NP242 in the MJ. The AW4's also have a seperate computer? (sort of computer) that works in conjunction with the Renix computer and the TPS for the automatic. Easiest swap is an MJ 4wd automatic, or a Cherokee 4wd automatic, still have to do an axle swap and a bunch of other things to have a 4wd auto MJ

[Green Mesa XJ]

Yeah there’s a computer for the transmission all the AW4 year, well not sure about 97 up.
It’s a basic computer to control the sifting. You can run without it if you want and disconnecting it is a way to test the transmission, so it’s not something that bricks the transmission.
The computer itself is a small box usually located under the dash kick panel, whatever the correct term, the panel the ashtray is in, on the passenger side.
If you’ve seen a 80-90s Toyota transmission computer it basically looks the same


Sent from my iPhone using Tapatalk Pro

[Jeeperscreeper]

Yes the yj is a 3 speed auto. I would be able to take anything from it as it is a full running vehicle. I know I would have to get an axle but want to start with getting a transmission and tcase In first and just run without from shafts as funds are limited. These Winters are brutal with a rwd vehicle esp when it's the first year I'm without it lol.

[Pete M]

snow tires are better than 4wd for snow.   

[Gene]

1 hour ago, Pete M said:

snow tires are better than 4wd for snow. 

Hi Pete,

I am going to respectfully disagree with this.  I have about 45 years driving experience, northeastern Pennsylvania/southwestern Pennsylvania/Western Maryland, so I have seen and driven in my share of snow.

I will take a 4 wheel drive/all wheel drive vehicle with fair all weathers to a rear wheel drive vehicle, especially a lightly loaded pickup truck, with snow tires.  A small pickup, like a Comanche or Chevy S10, even with brand-new snows, is about worthless with just rear wheel drive.

Put quite a bit of weight in back, totally different story.  For a while we lived in a house with a fairly steep gravel driveway with a hairpin turn halfway up.  A local excavator, who kept gravel on site, was about 2 miles away.  When our driveway would ice up, I would go to the excavator, get about a ton of gravel in the Comanche, and have exceptional traction in rear wheel drive.

Any one else's thoughts on this?

Gene
 

[cruiser54]

14 hours ago, Jeep Driver said:

 

 

I think we may have to alter our vernacular. 

 

Nah.

 

 

[Pete M]

52 minutes ago, Gene said:

Hi Pete,

I am going to respectfully disagree with this.  I have about 45 years driving experience, northeastern Pennsylvania/southwestern Pennsylvania/Western Maryland, so I have seen and driven in my share of snow.

I will take a 4 wheel drive/all wheel drive vehicle with fair all weathers to a rear wheel drive vehicle, especially a lightly loaded pickup truck, with snow tires.  A small pickup, like a Comanche or Chevy S10, even with brand-new snows, is about worthless with just rear wheel drive.

Put quite a bit of weight in back, totally different story.  For a while we lived in a house with a fairly steep gravel driveway with a hairpin turn halfway up.  A local excavator, who kept gravel on site, was about 2 miles away.  When our driveway would ice up, I would go to the excavator, get about a ton of gravel in the Comanche, and have exceptional traction in rear wheel drive.

Any one else's thoughts on this?

Gene
 

 

but what 2wd pickup doesn't have a ton of weight in the back for winter?     Back in its 2wd days I used to go out and hit the roads before the plow trucks came.    and those weren't even snow tires, just new BFG ATs. 

 

besides, stopping and turning are more important than acceleration.  snow tires for the win!!  

[Jeeperscreeper]

Not when you get dumped on bad lol. I will take 4x4 with bad tires all day lol. I have 6 sandbags in now and as soon as I hit an ice patch on the right rear I'm stuck and spinning. I feel like an idiot getting stuck in my driveway with a foot of snow lol but there is 2 in of ice under it lol

[Pete M]

have you driven with snow tires? 

[Jeeperscreeper]

I do currently with sandbags in the back. But it still kills my recovery and off-road fun haha