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Old 10-08-2002, 04:48 PM   #1 (permalink)
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SM420/Rockwell T221

I have a chance to purchase an SM420 connected to a Rockwell T221 transfer case. Did some searching and found this picture.
I talked to the guy that does my Driveshafts and builds some trans. for us at the shop. He knows a little about the case, says it had some oiling problems, but did not think these would matter on a trail rig, he thinks the output for the rear can be moved over to exit like a Yota case does, also the rear output is about 6 inchs lower than a 205 or D300......anyone know the low gear ratio, or any other info?
This was OEM on a 67 Chevy 3/4 ton PU.
The pix I have are too big, I don not have a resizing program, someone that does holler and I'll send them to ya, or recomend a free resizing program that is redneck easy to use and I'll get it.
Butch
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Old 10-08-2002, 05:07 PM   #2 (permalink)
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Old 10-08-2002, 05:44 PM   #3 (permalink)
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Butch:

I had one of these cases a few years ago - it had a 465 in front of it. The low range is 1: 1.96 (same as the 205 that replaced it). They are a good, strong case (some said almost as good as the 205) that I would have no hesitation using. Bearing and seal kits are available, but no other hard parts (gears and idler shafts). When I sold mine (on eBay) the buyer needed to cannibalize it to repair his case - there is a bronze bushing (bushings?) that go bad and are not available. If you move the rear output to the off-set position (which I believe can be done based upon internal inspection of mine) you only have 4WD. The off-set rear on mine had a PTO output.

Andy
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Old 10-08-2002, 06:51 PM   #4 (permalink)
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Old 10-08-2002, 06:52 PM   #5 (permalink)
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Old 10-08-2002, 07:36 PM   #6 (permalink)
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Yup, that's a Rockwell alright! The "dome" on the right is for the PTO drive.
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Old 10-08-2002, 11:18 PM   #7 (permalink)
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Re: SM420/Rockwell T221

Quote:
Originally posted by texican
or recomend a free resizing program that is redneck easy to use and I'll get it.
Butch
yeah, how big of an email can you take, i got one (finally) and its under a meg ill send it to you if you want, redneck simple and best of all FREE (two of the reasons i like using it)
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Old 10-09-2002, 07:24 AM   #8 (permalink)
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Yea, I also have access to one of these combo's, the guy wants $100.00 for bolth units with the adapter. I was wondering, if the T221 is the predisessor to the 205 , will the 205 bolt up to the adapter?

-Scott
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Old 10-09-2002, 07:43 AM   #9 (permalink)
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Quote:
Originally posted by Cruzilla
will the 205 bolt up to the adapter?

-Scott

excellent thinking.........!
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Old 10-09-2002, 09:21 AM   #10 (permalink)
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excellent thinking.........!
I've got both adapters around somewhere - might take a day to find them The drive sleeves appear to be the same (10 spline Chevy stuff) - the cool thing is that the 221 adapter is shorther than the 205 adapter, FWIW

Will get back to you on that.
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Old 10-09-2002, 12:29 PM   #11 (permalink)
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Quote:
Originally posted by Cruzilla
Yea, I also have access to one of these combo's, the guy wants $100.00 for bolth units with the adapter. I was wondering, if the T221 is the predisessor to the 205 , will the 205 bolt up to the adapter?

-Scott
You haven't bought it yet????
If you don't need the Rockwell PM me.
Butch
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Tires are like boobs, they always look big until you have played with them for a while, then you just want a bigger set.

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Old 10-09-2002, 02:08 PM   #12 (permalink)
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Old 10-09-2002, 10:45 PM   #13 (permalink)
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texican i have emailed you the resizing program

well my mate should be emailing it to you, he goes as wendleburger, but all the same its redneck simple and FREE

AWESOME!
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Old 05-04-2016, 12:44 PM   #14 (permalink)
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Quote:
Originally Posted by KrustyKruiser View Post
I've got both adapters around somewhere - might take a day to find them The drive sleeves appear to be the same (10 spline Chevy stuff) - the cool thing is that the 221 adapter is shorther than the 205 adapter, FWIW

Will get back to you on that.
Any update?
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Old 05-04-2016, 06:44 PM   #15 (permalink)
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Any update?
The guy you quoted hasn't been online in 4 years....
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Old 05-04-2016, 09:51 PM   #16 (permalink)
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Originally Posted by 75' Forty View Post
The guy you quoted hasn't been online in 4 years....
Thanks...
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