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Old 08-25-2005, 08:11 AM   #1 (permalink)
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help with Trans & TC spline's

Ok I have a 90 XJ with the auto and the I-6. I just bought it and have no idea what I have really but the info in Jeep specs leads me to believe that its a AW30-40 trans and the the TC I know is the 231. I was told that it should only be a 21Spline.

If this is correct is there a way to change the output on the tranny? Or what about a Auto that will bolt up to the I-6 that doesnt need any ECU/PCM inputs/outputs?

I am asking due to going to a Dana 300 or atlas II and 8.8/D44 axles. I know that the 21 just isnt good enough really for my goals.

Or Will a Dana300 take a 21Spline input?? Or anyone knwo if theres a adaptor for this?

Any dirrection/advise would be great...

Thanks
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Old 08-25-2005, 08:46 AM   #2 (permalink)
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From Novak's site

The last of the great Jeep gear-driven, iron-cased transfer cases, and perhaps the finest incarnation of them, was the Model 300, introduced in the 1980 model year. It is found in CJ Jeeps only.

This transfer case combines the strength of the Model 18 with the efficient design of the Model 20 into a compact, sturdy and serviceable unit. The 300, like its predecessors, had a passenger side front output yoke. The unit has a respectable gear ratio of 2.62:1 and runs direct in high.

The 300 uses all helically cut gears. It uses a large 1.25" intermediate shaft. The Dana 300 is strong enough from the factory to handle even the most potent engines and situations.

There are two slightly different versions of the Model 300. The 1980 version had a shorter rear output yoke, while the later ones are longer. All stock 300's have a 23-spline internal input shaft that engages the input gear with 30 splines. Because if its strength, compact size and excellent design, the 300 is a very good transfer case to retain when doing a conversion.

...also see:
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In what appears to have been an understatement, the plant operator described the situation at the Number 4 reactor as "not so good."

Super conversion calculator website

Love and kisses, Zaphod..
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Old 08-25-2005, 08:49 AM   #3 (permalink)
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Also see the 231 info...

http://www.novak-adapt.com/knowledge/np231.htm


Oh and SEARCH is the word of the century here so try it out.
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Marc

In what appears to have been an understatement, the plant operator described the situation at the Number 4 reactor as "not so good."

Super conversion calculator website

Love and kisses, Zaphod..
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Old 08-25-2005, 08:52 AM   #4 (permalink)
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And here is the exact object of your desire for a the low price of XXX.XX

Now take this wonderful information that I have taken MY time to find for you and do good my son.


http://www.novak-adapt.com/catalog/kit_153_aw4.htm
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Marc

In what appears to have been an understatement, the plant operator described the situation at the Number 4 reactor as "not so good."

Super conversion calculator website

Love and kisses, Zaphod..

Last edited by ItsaCJ6; 08-25-2005 at 11:05 AM.
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Old 08-25-2005, 09:00 AM   #5 (permalink)
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thank you oh so much you wise one.... But I read all that already with the search feature...

Now back to my questions...

parts one:
"is there a way to change the output on the tranny? Or what about a Auto that will bolt up to the I-6 that doesnt need any ECU/PCM inputs/outputs?"

parts two:
"Will a Dana300 take a 21Spline input?? Or anyone know if theres a adaptor for this"

thanks
and Yes I have tried the search but it always times out unless I put too many words in the search for and then I dont get any real info on what I am looking for. But please yoda search for me if you know the way.......
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Old 08-25-2005, 11:03 AM   #6 (permalink)
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You didn't read very well then since it says they are ALL """""""""" 23 spline""""""""""".. Novak sell the adapter if you have a 21 spline and want it to fit the 23 spline DANA 300, not so diligent one.
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Marc

In what appears to have been an understatement, the plant operator described the situation at the Number 4 reactor as "not so good."

Super conversion calculator website

Love and kisses, Zaphod..
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Old 08-25-2005, 12:00 PM   #7 (permalink)
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daym I overlooked the second link you gave. 400$ for an adapter ouch.. So 700 for a 4:1 kit, 650 for a flip kit, 400 for an adapter kit, and then the 100-150 for the Dana300. Why do people do this swap? hell a atlas is only 1995$ for the 3.8:1 complete.. ummmmm
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