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Just got my new driveshaft at lunch...have ???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ftn96, Dec 13, 2000.

  1. ftn96

    ftn96 1/2 ton status

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    The guy at the driveshaft shop asked me if I had a TH400, because of the slip yoke I gave them to build my new shaft. I told him NO, it was a 700. But he argues with me. I was thinking I have a NP241 T-case. Is the output shaft of the 241 of similar size and spline count to the output shaft of the TH400? Basically I just want to verify what T-case I have. I have never got in to it yet. Im assuming its the 241, but I've only had it about 2 months, and theres no telling what the previous owners have done with the JIMI.
    Is there any other bolt up t-case's for the 700R4?

    I miss my Ex, but my aim is getting better!
    http://mccordhouse.freeservers.com
     
  2. Panther

    Panther 1/2 ton status

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    Hey ftn, I am a little confused.

    Your 90 should have a 700R4 tranny and an NP241 xfer case. The TH400 is another tranny used for bigger engines in some older full-sized trucks. So if he asked you about a TH400, he was referring to another tranny, not your xfer case.

    Check out
    http://www.chuckschevytruckpages.com/images/transpan.jpg
    for tranny ID.

    Hope this helped!

    <font color=blue>"You call it clearance, I call it head room." [​IMG]</font color=blue>
     
  3. Emmettology 101

    Emmettology 101 3/4 ton status

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    '90's came with the NP241 cases.. I am not sure what he is talking about. Maybe he is thinking since you have a 241 that you have a stout set-up, since they came in a lot of heavier trucks(i.e. Dodge 3/4 tons with Cummins'), and was a little puzzled that it would come behind a 700??....

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; http://emmett.coloradok5.com
     
  4. ftn96

    ftn96 1/2 ton status

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    LEts try this again. I KNOW I have a 700R4, and I am assuming that I have a NP241c, least thats what it came with from the factory. When I took the drive shaft and slip yoke to the drivashaft shop the guy asked me what this came out of? I told him as stated above. He said the slip yoke I have is from a TH400. So, less this guy is a bafoon, Im wondering if the output shaft of the 241 (TCASE) is the same or similar in size and spline as the output shaft of the TH400. Im trying to figure out if this guy is a bafoon or not, basically. Or is he correct?

    I miss my Ex, but my aim is getting better!
    http://mccordhouse.freeservers.com
     
  5. ken

    ken 1/2 ton status

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    I believe the output of your 241 is the same as a TH400s, 32 spline. Count em on your output, if its 32, then its the same as a TH400. Also, 241s came in 1989 and up 4x4s, the 208s were used from 1981-1988. The TH400 tranny was used in 3/4 tons and behind the 6.2 diesel, as well as all one tons (up till '91 when the 4L80 came out). BTW, your 700s output is 27 spline, which mates into a corresponding female input gear in your 241 that has 27 splines. If your rig had a TH400, it would have a 32 spline output mated into a 32 spline female input into the 241. The same also holds true for the 208 line of cases.

    ken
     
  6. ftn96

    ftn96 1/2 ton status

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    Thanks Ken. Thats what I was wanting to know. So the guy knows what he's talking about then. He recognized the size of the yoke, for its size and assumed it came out of a 400 tranny. Thats where the confussion came in until I reminded him that it was a 4x4 thus we are talking about a t-case, and I told him that if my tranny didn't have overdrive then I was actually Cindy Crawford and I'd... Never mind, but he got my point and proceeded to make me one hell of a good looking drive shaft. 1 inch longer, 1/4 thicker (3"), balanced, new everything except my yoke, and with new u-joints and not the Autozone brand. So we gonna see how this new puppy barks when I get home tonight.

    I miss my Ex, but my aim is getting better!
    http://mccordhouse.freeservers.com
     

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