NP231 doubler
I think the price is real resonable since I just got a quote of 75 a drive shaft. My rear might be ok... front wil need to have 7" added to it. Luckily I have a nice selection of old driveshafts to chose from.
I forgot to factor in what it is going to cost to have the block off plate welded to the crawl box. I will have a price on that today.. at least I hope too.
I forgot to factor in what it is going to cost to have the block off plate welded to the crawl box. I will have a price on that today.. at least I hope too.
Well got some work done all ready today. Got the front case cut in half

The bad thing I found out is.. a 90 aw4 is 21 spline
so now I need another 23 spline input gear. If not I am going to have to swap my SYE over to my t-case that is under my rig, and Use a TJ case. These are clocked flater and give the rig a "flat" Bottom.
On a happier note.. My buy of the week got delivered yesterday. It is an XJ d44 with crown vic brakes ruf stuff perches and a 3.92 and up carrier
The bad thing I found out is.. a 90 aw4 is 21 spline
so now I need another 23 spline input gear. If not I am going to have to swap my SYE over to my t-case that is under my rig, and Use a TJ case. These are clocked flater and give the rig a "flat" Bottom.On a happier note.. My buy of the week got delivered yesterday. It is an XJ d44 with crown vic brakes ruf stuff perches and a 3.92 and up carrier
CF Veteran
Joined: Nov 2008
Posts: 7,874
Likes: 100
From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
yeah, i'm gonna get his d300 killer looking shifters.
i have a sye, but i didn't put it in yet, so i'll still need new drive shafts, but that's easy enough to lengthen a front xj shaft. i may even get one made up.
the best part is with duffy's kit, you don't need to flip the 300. he is the chit.
i have a sye, but i didn't put it in yet, so i'll still need new drive shafts, but that's easy enough to lengthen a front xj shaft. i may even get one made up.
the best part is with duffy's kit, you don't need to flip the 300. he is the chit.
Yeah I I cant locate another 23 spline input... I wil just buy his shifters and run the d300 I have in my garage instead of a 231.
The 300 I have is meant for my MJ truggy though.. it is going to have a 203/d300 doubler
.
You shouldnt need a new front driveshaft. the 231/300 doubler is within 1/4 inch of the length of a stock 231
. For the rear I would take a stock front shaft, a stock rear shaft get a measurement and head down to the machine shop and have one put together. Prices I am getting for that is 50 bucks
The 300 I have is meant for my MJ truggy though.. it is going to have a 203/d300 doubler
.You shouldnt need a new front driveshaft. the 231/300 doubler is within 1/4 inch of the length of a stock 231
. For the rear I would take a stock front shaft, a stock rear shaft get a measurement and head down to the machine shop and have one put together. Prices I am getting for that is 50 bucks
The ones around here want to sell me a whole case
All I need is the input. I have a really good lead on one locally. So I might be golden. I also found out that are several different versions of 231 input gears.. so I hope the one I all ready ordered is right.
All I need is the input. I have a really good lead on one locally. So I might be golden. I also found out that are several different versions of 231 input gears.. so I hope the one I all ready ordered is right.
CF Veteran
Joined: Nov 2008
Posts: 7,874
Likes: 100
From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
yeah man, that's what i meant. a front shaft lengthened for a rear.
i would build a square slip shaft, but i drive it 300 klicks to the trails.
i'm gonna do the 300/231 with those killer twin sticks. damn, now i can't wait.
i would build a square slip shaft, but i drive it 300 klicks to the trails.
i'm gonna do the 300/231 with those killer twin sticks. damn, now i can't wait.
CF Veteran
Joined: Jan 2010
Posts: 2,059
Likes: 1
From: Indianola IOWA
Year: 1992
Model: Cherokee
Engine: 4.0
Where are you from?
Senior Member
Joined: Sep 2008
Posts: 688
Likes: 1
From: Nashville, TN
Year: 2000
Model: Cherokee
Engine: 4.0L HO
hell yea man, way to join the 'Low Low Twin Stick' club. I looked at both of the doubler kits, but i ended up going with the Klune and a dana 300. its looking good, now get it done!
(i shouldnt say anything, mines still on jackstands)
(i shouldnt say anything, mines still on jackstands)
Klunes are just bad *** wish I had the jack to do that.I am waiting on parts, and a machine shop to do the welding. Cant rush other ppl... wel I will if it isnt dont by the day I was quoted.
I am learning some stuff about the 231 t-case. I wil tell more when I confirm or deny what I have learned/
I am from the Tidewater/richmond area of VA.
We have a couple in the club I belong too. Now that I am doing it some other ppl local too me are interested as well.
Here is the kicker.. there is a guy on a local board selling a 21 spline 231 with a tera low kit in it. resonabley priced.. soooo Not sure if I am going to jump on it. That would give a real stupid double low of 10.8... or I might get it and just swap it into my DD MJ and be a cool kid
We have a couple in the club I belong too. Now that I am doing it some other ppl local too me are interested as well.
Here is the kicker.. there is a guy on a local board selling a 21 spline 231 with a tera low kit in it. resonabley priced.. soooo Not sure if I am going to jump on it. That would give a real stupid double low of 10.8... or I might get it and just swap it into my DD MJ and be a cool kid
CF Veteran
Joined: Aug 2008
Posts: 6,588
Likes: 495
From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
I am from the Tidewater/richmond area of VA.
We have a couple in the club I belong too. Now that I am doing it some other ppl local too me are interested as well.
Here is the kicker.. there is a guy on a local board selling a 21 spline 231 with a tera low kit in it. resonabley priced.. soooo Not sure if I am going to jump on it. That would give a real stupid double low of 10.8... or I might get it and just swap it into my DD MJ and be a cool kid
We have a couple in the club I belong too. Now that I am doing it some other ppl local too me are interested as well.
Here is the kicker.. there is a guy on a local board selling a 21 spline 231 with a tera low kit in it. resonabley priced.. soooo Not sure if I am going to jump on it. That would give a real stupid double low of 10.8... or I might get it and just swap it into my DD MJ and be a cool kid
I often think what some companies recommend is so they can sell stuff to ppl. I almost think the ratio spread would be too much. I know a bunch of ppl running d300 with 4 to 1's and auto, and they love it... I jus started wheeling a manual within the last 1.5 yrs.. and I love the control it gives me on the trail.


