flipped 231 (box4rocks) and dana 300

BRIANHO13 · Oct 7, 2006

Here is what everything looks like prior to going into the rig.

Here is how much you will have to cut if you want to go this route.

The 300 has upgraded 32 spline outputs (front and rear) to handle the torque and will be twin sticked as soon as I add a couple bends to the shifters. Dana 44 front already has chromo shafts and superjoints, so the front digs will be fun.

MogifiedXJ · Oct 7, 2006

It looks sweet...How long is the tc assembley now?

vetteboy · Oct 8, 2006

MogifiedXJ said:
It looks sweet...How long is the tc assembley now?

Here's some comparison pics I took when I did mine.

I'm running the D300 passenger drop in my XJ though, clocked nearly flat. Whole nother world of cuttin. It's another inch higher than shown here, to give you an idea.

Questions for BRIANHO - why flip the 231 case and not just the D300? Better shifter clearance or something? What did you do about the vent tube on the 231? Are you planning on bracing the D300 at all?

You can add some bling to the Box4Rox pretty easily too, by getting some pipe-to-tube fittings and a 6" length of 1/4" OD clear plastic tube. You can sorta see it on the adapter plate in this pic.

BRIANHO13 · Oct 8, 2006

vetteboy said:
Questions for BRIANHO - why flip the 231 case and not just the D300? Better shifter clearance or something? What did you do about the vent tube on the 231? Are you planning on bracing the D300 at all?

I had to flip the 231 case, because it interferes with the 300 yoke. I threaded the original 231 vent with a 1/8" NPT and plugged it, then put a new vent on the top (you can see it in the pic), going to make it a right angle though. I think I need to brace the 300 somehow, I will be taking a better look at it once I get the shafts done.

vetteboy · Oct 8, 2006

BRIANHO13 said:
I had to flip the 231 case, because it interferes with the 300 yoke. I threaded the original 231 vent with a 1/8" NPT and plugged it, then put a new vent on the top (you can see it in the pic), going to make it a right angle though. I think I need to brace the 300 somehow, I will be taking a better look at it once I get the shafts done.

OK, yeah, I see it now. That's weird. I've been through that case dozens of times but I never really looked at it upside down. :wierd:

I haven't braced my 300 yet either. Post up when you do it, or if I get to mine first, I'll put up some pics.

Kinda neat having nearly 45:1 just from the transmission and t-cases. That's better than my old crawl ratio was (including the axle).

I'll be at 185:1 overall but it's still on jackstands, so that's kind of a moot point.

Gil BullyKatz · Oct 8, 2006

not as beefy as a 231/300 combo...

but what would a 231/231 combo end up at?

OT · Oct 8, 2006

Gil BullyKatz said:
not as beefy as a 231/300 combo...

but what would a 231/231 combo end up at?

2.72:1

Gil BullyKatz · Oct 8, 2006

OT said:
2.72:1

not worth the adaptor?

better off buying a 4:1 kit?

87manche · Oct 8, 2006

Gil BullyKatz said:
not worth the adaptor?

better off buying a 4:1 kit?

2.72 is stock.
See if brian is selling his.

twisted_ed · Oct 8, 2006

very interesting, Curious as to what the benifit of this is and how hard was it to make two different transfer cases mate together? Is that half a 231 or a full 231 without the tailcone

Gil BullyKatz · Oct 8, 2006

87manche said:
2.72 is stock.
See if brian is selling his.

So now I'm confuscated...

2.72 is stock for one 231 or for two 231's joined?

:dunno:

CanMan · Oct 8, 2006

Gil BullyKatz said:
So now I'm confuscated...

2.72 is stock for one 231 or for two 231's joined?

:dunno:

Stock.

2.72x2=5.44?

Yucca-Man · Oct 8, 2006

12GAXJ said:
Stock.

2.72x2=5.44?

You are correct, but you are using the wrong formula...

2.72 x 2.72 = 7.3984 reduction

BRIANHO13 · Oct 8, 2006

Yucca-Man said:
You are correct, but you are using the wrong formula...

2.72 x 2.72 = 7.3984 reduction

This is correct. I left the stock gears in the 300 (2.62) so I have a little higher ratio, 7.1, I guess it will have to do

. Already sold my 231 with the 4:1. and the doubler is only the front half of the 231 (split the 231 and cut off the front output).

I think that answered all the questions. Oh yea if you use a 231 behind a 231 it will be pretty darn long, but you wouldn't have to mess with flipping the first 231.

bxj · Oct 8, 2006

.Can't tell from the fotos, are the driveshafts supported-.just curious, how is that additional transfer weight supported on the crossmembers?

jeepnuts311 · Oct 8, 2006

brianHO,

why didnt you leave it the way you had it in the second picture with driver side drop?

oiling problems with the flipped 300?

-Tim

BRIANHO13 · Oct 9, 2006

jeepnuts311 said:
brianHO,

why didnt you leave it the way you had it in the second picture with driver side drop?

oiling problems with the flipped 300?

-Tim

Not sure what you are saying, it is set up for drivers drop. People flip 300s all the time and I haven't heard of any oiling issues.

BRIANHO13 · Oct 9, 2006

bxj said:
.Can't tell from the fotos, are the driveshafts supported-.just curious, how is that additional transfer weight supported on the crossmembers?

Driveshafts supported? I plan on adding another tranny support to my tcase skid.

jeepnuts311 · Oct 9, 2006

BRIANHO13 said:
Not sure what you are saying, it is set up for drivers drop. People flip 300s all the time and I haven't heard of any oiling issues.

sorry, i misquoted you, it was vetteboy who said he was running passenger side drop.

vetteboy said:
I'm running the D300 passenger drop in my XJ though, clocked nearly flat. Whole nother world of cuttin. It's another inch higher than shown here, to give you an idea.

-Tim

flipped 231 (box4rocks) and dana 300

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