6L80E to NP231... Horizontally flat T/C for Belly up??? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 04-13-2012, 01:30 PM   #1 (permalink)
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6L80E to NP231... Horizontally flat T/C for Belly up???

I searched Pirate but did not find what I was looking for. If there is a thread where I can get this info please post it.

Otherwise:

I'm putting a L92/6L80E/NP231 combo into my jeep and was wondering whether the transfer case could be installed horizontally without causing problems to the transfer case. I have 2 options... I could use the adapter from Novak http://www.novak-adapt.com/catalog/kit_4l61.htm (the 6L80E uses the same adapter as the 4L60E) which has a few options for positions of the transfer case OR I have a machine shop that can machine an adapter for me for about the same price and said he could make it so that the transfer case was flat(if possible) but he didn't know whether it would cause any problems or whether it would actually be possible to be installed that way. Again, this is to hopefully simplify the install of a flat belly. It's an 05 TJ if it matters.
I tried speaking to the people at Novak without avail, maybe I spoke to the wrong person because he wasn't exactly sure what I was trying to acomplish.

Please shed some light. Thanks in advance for any comments.
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Old 04-13-2012, 01:34 PM   #2 (permalink)
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I tried speaking to the people at Novak without avail, maybe I spoke to the wrong person because he wasn't exactly sure what I was trying to acomplish.
Me either. I don't see the 231 lasting long behind that setup. What size of tire do you plan to run?
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Old 04-13-2012, 01:39 PM   #3 (permalink)
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The np231 and 6l80 have the same bolt pattern just different clocking but the np231 is only 23 spline input to the 32 spline output of the 6l80. There is no point spending the money on swapping the input or output unless you have a special case half for the 231 already with a 32 spline input? A chain drive 231 is not going to like the v8. Get an np205 if anything and you can drill into the cast housing to get the clocking right. Or just go right to an Atlas that can be ordered with 6l80 clocking.
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Old 04-13-2012, 02:01 PM   #4 (permalink)
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Me either. I don't see the 231 lasting long behind that setup. What size of tire do you plan to run?
The 231 will be okay, it's a strong transfer case. I will upgrade when it breaks but that won't happen anytime soon. I like going mainly to the sand and will be using 33 inch paddles and 37's offroad (dual purpose?), I don't have a heavy foot offroad, only on the sand. Sand is not too harsh on transfer cases.

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The np231 and 6l80 have the same bolt pattern just different clocking but the np231 is only 23 spline input to the 32 spline output of the 6l80. There is no point spending the money on swapping the input or output unless you have a special case half for the 231 already with a 32 spline input? A chain drive 231 is not going to like the v8. Get an np205 if anything and you can drill into the cast housing to get the clocking right. Or just go right to an Atlas that can be ordered with 6l80 clocking.
Hmmm, interesting. Technically, the machine shop could drill new bolt patterns onto the t/c or tranny and get the clocking right without an adapter made? If that is possible, we coult machine (or buy) new input/output shafts. The NP231 will be okay for now at least, plus, it has the perfect ratio for the sand. NP205... I'll look into that one. Atlas would be some nice bling but I really have no need for an atlas. Last time I checked, their closes ratio to the 2.72:1 was their 3.0:1 and I don't know how that would do on sand, it sure would do a little better offroad I know that much.

Thanks for the ideas, keep them coming.
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Old 04-13-2012, 02:05 PM   #5 (permalink)
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I think I need to clear up my needs...

The main thing I need to know is whether the np231 can be paired to the 6L80E at 180 degrees (or close to it) without causing problems to the t/c.
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Old 04-13-2012, 04:27 PM   #6 (permalink)
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You want to use a drivers drop tcase passenger drop? The np231 uses a pump for oiling and it wouldn't be in atf flipped. The 6l80 tailhousing is ribbed not solid so I wouldn't redrill it
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Old 04-14-2012, 10:30 AM   #7 (permalink)
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You want to use a drivers drop tcase passenger drop? The np231 uses a pump for oiling and it wouldn't be in atf flipped. The 6l80 tailhousing is ribbed not solid so I wouldn't redrill it
No, It would be places in original side drop. But flat. Would the np231 be ok to redrill?
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Old 04-14-2012, 12:47 PM   #8 (permalink)
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No there isnt enough meat to redrill the pattern on the case. Get a clocking ring and a 32 spline input from a NP241. While you are at it get the 6 planet planetary for the 241 as well,so you get an upgrade in strength. Throw a wide chain kit in it, using gears from a dakota, with a SYE and you have a nicely polished turd that should last quite a while behind a V8
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Old 04-18-2012, 12:23 PM   #9 (permalink)
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No there isnt enough meat to redrill the pattern on the case. Get a clocking ring and a 32 spline input from a NP241. While you are at it get the 6 planet planetary for the 241 as well,so you get an upgrade in strength. Throw a wide chain kit in it, using gears from a dakota, with a SYE and you have a nicely polished turd that should last quite a while behind a V8
I didn't think so. Would that "turd" still use the 231 sye? Good info, thank you.
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Old 04-18-2012, 12:37 PM   #10 (permalink)
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No there isnt enough meat to redrill the pattern on the case. Get a clocking ring and a 32 spline input from a NP241. While you are at it get the 6 planet planetary for the 241 as well,so you get an upgrade in strength. Throw a wide chain kit in it, using gears from a dakota, with a SYE and you have a nicely polished turd that should last quite a while behind a V8
This.
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Old 04-18-2012, 12:41 PM   #11 (permalink)
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Originally Posted by Madzooki View Post
No there isnt enough meat to redrill the pattern on the case. Get a clocking ring and a 32 spline input from a NP241. While you are at it get the 6 planet planetary for the 241 as well,so you get an upgrade in strength. Throw a wide chain kit in it, using gears from a dakota, with a SYE and you have a nicely polished turd that should last quite a while behind a V8
Have you ever priced all that stuff? I haven't. And won't because I don't need it. Just curious on a cost comparison versus going a different route.
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Old 04-18-2012, 07:11 PM   #12 (permalink)
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Can anybody please answer my question? I am fine with the 231 blowing up whenever it has to. When it does i will upgrade. As of now, it will do perfectly fine.
Again my question...
Can an NP231 be clocked so that it lays parallel to the floor?
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Old 04-18-2012, 07:14 PM   #13 (permalink)
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I think I need to clear up my needs...

The main thing I need to know is whether the np231 can be paired to the 6L80E at 180 degrees (or close to it) without causing problems to the t/c.
No
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Old 04-18-2012, 07:21 PM   #14 (permalink)
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Quote:
Originally Posted by MO1535M View Post
I didn't think so. Would that "turd" still use the 231 sye? Good info, thank you.
Yes it would still use the 231 SYE

Quote:
Originally Posted by Dookey View Post
Have you ever priced all that stuff? I haven't. And won't because I don't need it. Just curious on a cost comparison versus going a different route.
I havent ever had to buy an input or planetary for myself. I have usually traded for other stuff, and havent had to ever buy a new process tcase for me. I know a used 241 input and planetary the last time I bought one for a customer was around 175 dollars. The last time I bought a wide chain kit I got the whole dakota tcase for 50 bucks, so you cant really count that. It still comes out way cheaper than a atlas or adapting and flipping a d300.

Before the atlas, people used what they had and adapted it to their trans they were swapping in. Thats how advance and novak got their starts. The 231 is fine for most people. Traction is what will kill the cast aluminum case.

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Old 04-18-2012, 07:23 PM   #15 (permalink)
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Quote:
Originally Posted by MO1535M View Post
Can anybody please answer my question? I am fine with the 231 blowing up whenever it has to. When it does i will upgrade. As of now, it will do perfectly fine.
Again my question...
Can an NP231 be clocked so that it lays parallel to the floor?
Yes it can be clocked flat. Buy a clocking ring and clock it flat. as long as the pump has fluid it will be fine.

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Old 04-18-2012, 08:43 PM   #16 (permalink)
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If you clock it flat it will be quite a bit higher than the bottom of the trans pan. In a jeep I don't know why you would need it clocked so high.
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Old 05-01-2013, 06:47 AM   #17 (permalink)
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So how did this project turn out?
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Old 05-01-2013, 05:33 PM   #18 (permalink)
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I wasn't aware you could get a 32 spline input shaft for a 231...
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