D20 Low 2WD Is it possible? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 04-08-2002, 02:13 PM
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D20 Low 2WD Is it possible?

Is it possible that my Dana 20 T-case has a 2 WD Low? Just above my 4L position, there is another catch which keeps my t-case in low but will not turn the front drive line. I never paid any attention to the unknown catch until I drove it without the transmission cover on and noticed drive line not turning unless I moved the shifter one more click back.
Is this a modification someone was able to do before I bought it or is something wrong? Have had no other issues with it. Thanks for any help.
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post #2 of (permalink) Old 04-08-2002, 02:28 PM
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Re: D20 Low 2WD Is it possible?

My CJ-5 used to do that as well. If you don't throw the stick all the eay down it will go into 2L. I usually didn't realize it till I was cursing at my lack of traction and seriously considering a front locker, but then you hit the stick and hear the telltale grind when it engages all the way and off you go.....
post #3 of (permalink) Old 04-08-2002, 02:30 PM
 
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Re: D20 Low 2WD Is it possible?

To answer your question, no it is not supposed to do that. Usually it is because the linkage is worn. Mine also has this added extra feature. I like it....except when I think I'm in 4lo but really only in 2lo.
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post #4 of (permalink) Old 04-08-2002, 03:17 PM
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Re: D20 Low 2WD Is it possible?

Mine has that as well, and its not the linkage. I replaced all the linkage when I added the t-18 and it still does it.
post #5 of (permalink) Old 04-08-2002, 03:31 PM
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Re: D20 Low 2WD Is it possible?

So maybe some D20's have this option?
post #6 of (permalink) Old 04-08-2002, 03:48 PM
 
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Re: D20 Low 2WD Is it possible?

It's not really an option on Dana 20's. Just as they get older and wear, 2wd becomes an option. Most older 20's that I've seen do this. It's just like an extra indent just before 4wd low. It's pretty handy when you just need the low range and not 4wd.
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post #7 of (permalink) Old 04-08-2002, 03:58 PM
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Re: D20 Low 2WD Is it possible?

I don't think it's a matter of wear. Mine would do that when it was less than a month old.
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post #8 of (permalink) Old 04-10-2002, 09:43 AM
 
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Re: D20 Low 2WD Is it possible?

This is an internal wear issue where the shift rails contact the detent balls and springs. Kinda nice to have. You can also get the following combo's by pulling the shift interlock pill out of the rail area and adding twin sticks.
Front 2 wd hi
front 2 wd low
rear 2 wd low
rear 2 wd hi
reg 4x4 low and hi and the case busting front hi/ rear low
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post #9 of (permalink) Old 04-10-2002, 10:44 AM
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Re: D20 Low 2WD Is it possible?

Honestly it has nothing to do with the internal of the t-case. It's wear in the linkage. You get enough play in it that it allows one of the shift rails to go to low before the other has come out of neutral. Mine did it and as soon as I shimmed out the slop in the linkage the 2 low went away. Needless to say I undid my shimming to get 2 low back!
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