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Anyone swap out a 208 for a 241?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by kpanza, Jun 4, 2002.

  1. kpanza

    kpanza 1/2 ton status

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    Hey guys,

    I am wanting to swap out my old, leaky, probably cracked again 208 for a 241 case. The truck is an '87 and has the mechanical speedo of course. The 241 I am looking at buying also has the mechanical speedo setup (I think it is out of an '89).

    I guess what I am wanting to know is what, if any, modifications am I going to have to do to make the swap happen? Are the 208 and 241 the same in length, so I can avoid driveshaft length changes? Will my present driveshafts hook up to the case, or is the rear slip yoke a different spline count? All of the shift linkages are coming with the 241, so will they all hook right up to my floor shifter just fine?

    Any other things I have missed and you can comment on, I would really appreciate! Hopefully it's a simple matter of dropping one out and bolting the other in, but I know there is always SOMETHING!
     
  2. kpanza

    kpanza 1/2 ton status

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    No one's done the swap?
     
  3. smartpatrol

    smartpatrol Registered Member

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    Why not just go for the NP205 swap?
     
  4. DesertDueler

    DesertDueler 1/2 ton status

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    2.72:1 low versus the 205s 2:1 low, lighter, the NP 241 bolts right on to the 700r4, and they make a SYE kit for it. Sorry cant help you on the driveshaft part, but I believe they are the same. My dads Burb (89) has the same length d-shaft as my burb with a 208.

    Dan
     
  5. BLUESMAN

    BLUESMAN 1/2 ton status

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    Anyway to bolt an NP241 case to an SM465 trans?
     
  6. pcorssmit

    pcorssmit 1/2 ton status

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    I did the swap (both ways) a month or so ago, just bolt in and go. I would recommend adjusting the shifter linkage when you're done.

    Pete
     
  7. kpanza

    kpanza 1/2 ton status

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    Cool, thanks for the replies guys! I think I am gonna go for the 241...and someday also do the SYE with one of High Angle Driveline's CH shafts as well...

    Pcorsmitt - so the driveshafts didn't need to be changed at all? That was my major question, as I have spares and everything and don't want to be having to go down and get them all lengthened or shortened just for the swap! /forums/images/icons/smile.gif
     
  8. kpanza

    kpanza 1/2 ton status

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    Cool, thanks for the replies guys! I think I am gonna go for the 241...and someday also do the SYE with one of High Angle Driveline's CV shafts as well...

    Pcorsmitt - so the driveshafts didn't need to be changed at all? That was my major question, as I have spares and everything and don't want to be having to go down and get them all lengthened or shortened just for the swap! /forums/images/icons/smile.gif
     
  9. pcorssmit

    pcorssmit 1/2 ton status

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    If there are any differences in the output lengths, they are very small--I didn't notice any difference.

    Pete
     
  10. kpanza

    kpanza 1/2 ton status

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    Great! That's what I wanted to hear! /forums/images/icons/smile.gif As for the shift linkages, are they the same? O r do I need to get the linkages with the 241 and swap them into my truck and get rid of the 208 linkages?

    Thanks!
     
  11. pcorssmit

    pcorssmit 1/2 ton status

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    I left the linkages on the trucks, and disconnected them at the lever on the t-case (took the cotter pin out).

    Pete
     
  12. kpanza

    kpanza 1/2 ton status

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    Great, that's what I wanted to hear about the linkages...just leave them in there and hook it back up to the t-case...

    Thanks for your help!
     
  13. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Isn't the trans case adapter different? My 241 adapter behind my 700 is different than my friends 208 behind a 700. My blazer is an 89 and my friends is an 84. Did they change adapter styles between the years for either case?
     
  14. pcorssmit

    pcorssmit 1/2 ton status

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    They changed the adapter to accomodate a different style trans mount, around '85. The actual trans/adapter/t-case interface remained the same though (at least functionally).

    Pete
     

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