Anyone here redrill an NP-241 adaptor so you could bolt up a NP-203 or 205? I've heard it mentioned before but have never seen it done
Thanks
Thanks
CK5
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Re-drilling NP241 adapter
- Thread starter muddermilitia
- Start date
You don't re-drill the adapter but rather drill the adapter pattern onto the intended use t-case.
I just had a friend drill the NV4500 adapter pattern onto a 203 range box for bp71k5 on here.
I just had a friend drill the NV4500 adapter pattern onto a 203 range box for bp71k5 on here.
oh, ok I was wondering because I have a 203 but it is missing the adaptor. My brother has a 203 with adapter but I think he wants to keep it.4X4HIGH said:
btt, anyone else redrill their 203 to mate a 208/241 adapter to it? any tips and tricks on the best way to do it?
Drop the adaptor onto the face of the 203. The input bearing retainer will act as a spigot and center up the adaptor. Use a transfer punch through the adaptor holes to make where to drill. Drill the 203...
Stuff that makes it a bit interesting is getting the clocking correct. You should be able to ballpark that without too much trouble. Secondly, chips into the 203...probably best to do this to a disassembled 203 and on a drill press. Lastly, 5 holes will end up on the machined face of the 203, the 6th ends up on a curved section of the cast. I went with 5 out of 6...
The 208/241 6 hole pattern is pretty much identical to the NV4500 pattern. The only difference is that the pattern is mirrored on the NV4500. The 6 hole pattern is not symmetrical...
Rene
Stuff that makes it a bit interesting is getting the clocking correct. You should be able to ballpark that without too much trouble. Secondly, chips into the 203...probably best to do this to a disassembled 203 and on a drill press. Lastly, 5 holes will end up on the machined face of the 203, the 6th ends up on a curved section of the cast. I went with 5 out of 6...
The 208/241 6 hole pattern is pretty much identical to the NV4500 pattern. The only difference is that the pattern is mirrored on the NV4500. The 6 hole pattern is not symmetrical...
Rene
cool, thanks for the help 
bp71k5
3/4 ton status
One other option you have for the 6th hole is to drill a smaller hole, but move it over inboard so it clears the. Scott's buddy used a 1/4-20 for this and it works fine. The smaller bolt probably doesn't do much for strength, but I guess it's just slightly better than nothing.
Definately drill it *after* completely disassembling it.
