gonefishin
1/2 ton status
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CK5
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241/205 doubler intermediate shaft
- Thread starter BoondocK5
- Start date
Mine doesn't have any extra length and it's shifted from the front.
mpascino
1/2 ton status
Hey guys, been a long while since I posted here. We had some down time after we blew the blazer up for the last time at Paragon(long while ago) with a bunch of the guys here and moved outside of the GM truck thing for a while. We've been back in it for a few years now, just don't find the time to get on the forums much...We just returned from another swap/show weekend at Englishtown today. One of the guys I talked to today mentioned he thought he saw some of our products on CK5 recently, so I had to check it out! I have to admit, we've been super busy lately, but I have no idea how I've missed this thread (here or other places)! 
I figured I would post up some pics of our 241 range box and components, (known around our shop as the Diablo box). A bunch of the guys here have seen this unit in action in our blazer years ago. The pics attached are of the demo unit we drag around. We have built several of these from repurposed 241 cases in house for the local guys and have discussed the idea of a kit for roughly 8 years now, we recently expanded our milling capabilities making it more feasible to open something like this up to the general market. If there is interest I will put something together in the Vendors form here(membership paid up as of this evening) . We have used resplined shafts previously but I have quotes from a local shop/partner to make from scratch from a while back) If there is enough interest to move forward with this we maybe able to stock/offer shafts out for the methods discussed in the thread. What I can tell everyone is when done right, this setup has not proven to be the weakest link yet! It can clock pretty much any where needed and mounts to either 6 bolt cases or figure 8 cases. I hope no one takes this post as a hi jack, Just figured we might be able to save everyone some time and dough!
Thanks,
Mike
Trail Tech Fab
I figured I would post up some pics of our 241 range box and components, (known around our shop as the Diablo box). A bunch of the guys here have seen this unit in action in our blazer years ago. The pics attached are of the demo unit we drag around. We have built several of these from repurposed 241 cases in house for the local guys and have discussed the idea of a kit for roughly 8 years now, we recently expanded our milling capabilities making it more feasible to open something like this up to the general market. If there is interest I will put something together in the Vendors form here(membership paid up as of this evening) . We have used resplined shafts previously but I have quotes from a local shop/partner to make from scratch from a while back) If there is enough interest to move forward with this we maybe able to stock/offer shafts out for the methods discussed in the thread. What I can tell everyone is when done right, this setup has not proven to be the weakest link yet! It can clock pretty much any where needed and mounts to either 6 bolt cases or figure 8 cases. I hope no one takes this post as a hi jack, Just figured we might be able to save everyone some time and dough!
Thanks,
Mike
Trail Tech Fab
blazin_blazer
1/2 ton status
how much trouble will it be to put this between a sm465 & a np205. i know the adapter to do a 203/205 doubler behind a 465 is like a needle in a haystack w/o redrilling the 203 to a 208 pattern. what adapter would be used here w/241. a 241 is same bolt pattern as a 208 isnt it? so do i only need a 32 tooth 465 output and a 465/208 adapter this would all bolt together, w/the special shaft and ''box'' for the 241 planetaries? can this special shaft 241 input be made for the 10 spline 465's output and it all bolt right together? i am really interested in this, as i have been searching for a factory 465/203 adapter & just had 1 slip thru my fingers and i'm discouraged. so i am looking for different ways for a doubler behind a standard trans now. i was actually thinking of getting w/my machine shop buddy and making that 203 adapter and shaft but i think this may be easier and better w/ deeper gears even!
Just saw this, so I'll tell everyone what I know from RCV Performance, This is the outfit making my intermediate shaft for me.
1. It's a brand new shaft, made from 4340 steel. pretty much unbreakable in this application. (The case will shatter first)
2 It will have the RCV guarantee with it. "If it breaks, RCV will replace the shaft for free."
3. One shaft will cost $185.00 + shipping.
4. A "group buy" could definitely be put together to lower the price, RCV Performance does the group buy thing all the time on PBB. I was told "for sure" the price goes down considerably the more that are purchased together.
5. To quote the email I received "25+ shafts purchased, price equals $85.00 each."
The shaft that is being produced for me is for mating a 241 to a 205, 32 spline. It will be ready for me to purchase at the end of this week(04/21-04/22)
I will keep you all apprised.
???? PM me.
1. It's a brand new shaft, made from 4340 steel. pretty much unbreakable in this application. (The case will shatter first)
2 It will have the RCV guarantee with it. "If it breaks, RCV will replace the shaft for free."
3. One shaft will cost $185.00 + shipping.
4. A "group buy" could definitely be put together to lower the price, RCV Performance does the group buy thing all the time on PBB. I was told "for sure" the price goes down considerably the more that are purchased together.
5. To quote the email I received "25+ shafts purchased, price equals $85.00 each."
The shaft that is being produced for me is for mating a 241 to a 205, 32 spline. It will be ready for me to purchase at the end of this week(04/21-04/22)
I will keep you all apprised.
???? PM me.
blazin_blazer
1/2 ton status
oh now i see, the ''special'' shaft goes between the t-cases, not the trans and t-case. all 241's are 32 spline, correct? so i will need the newer sm465 output which is 32 spline, a 208 adapter, and this special shaft. i already have a 241 case & a 243 which i think is same except for elec shift. plus i can weld aluminum. how thick is that plate need to be between t-cases? i need to read up on this build more.
mpascino
1/2 ton status
I know we haven't posted the ads up here on this board yet, but just an FYI we can make the white elephant adapter you mention. We make clockable t-case adapter kits for most popular applications. Our main business is focused around clocking plates, adapters, steering components, etc.
To answer your question, there is no means to put a 10 spine shaft into a 241. You could run a 32 spline sm465 with no issue. The best tcase's to use are the female input type. When using the 205, the 31 or 32 spline is prefered. Not saying the 10 and 27 spline male setup can't be made to work, but I would swap out the input shaft in the 205 to a 31 or 32 splined setup if I had the choice.
Thanks,
Mike
mpascino
1/2 ton status
Thanks for the info, I'm going to contact RCV in the morning. It sounds like they my be better suited to make our shafts long term.
-Mike
blazin_blazer
1/2 ton status
yea, after thinking about it, going 31/32 spline would be the only way to go. but that means finding a 205 out from behind a th400 or machining a 10 or 27 spline case to fit a 32 spline bearing size.
could a 32 spline 205 input shaft be made that would fit a 27 spline bearing/case w/o machining it for the bigger bearing? i think that would help when gathering up parts b/c then all 205 cases would be viable.
could a 32 spline 205 input shaft be made that would fit a 27 spline bearing/case w/o machining it for the bigger bearing? i think that would help when gathering up parts b/c then all 205 cases would be viable.
mpascino
1/2 ton status
Unfortunatly no, the 31 and 32 female spline inputs can't be modified to fit the smaller bearing. Any machine shop, or anyone with a bridgeport and a boring head can open up the bore for you if that's the route you go. We do it regularly here, even shipped a few bare cases around.
I was thinking the other day.
About the lengths of the long input 32 spline NP205 input shafts. It may be able to be used on a doubler setup such as mine, if, we used another Transmission/Tcase adapter from a 400/205, mounted to the 205 like it normally would be.
Then drill the backing plate on the back of the 241 gear doubler to accept the front bolt pattern of the 400/205 adapter. Not sure if the intermediate shaft would need to be longer or not. But, definitely do-able, and would provide another support to an all ready chopped up 241 housing.
thoughts??
About the lengths of the long input 32 spline NP205 input shafts. It may be able to be used on a doubler setup such as mine, if, we used another Transmission/Tcase adapter from a 400/205, mounted to the 205 like it normally would be.
Then drill the backing plate on the back of the 241 gear doubler to accept the front bolt pattern of the 400/205 adapter. Not sure if the intermediate shaft would need to be longer or not. But, definitely do-able, and would provide another support to an all ready chopped up 241 housing.
thoughts??
That would add a significant amount of length, the use of a semi-rare and expensive adapter, and a semi-rare and expensive input gear. Why?
Fair enough.
I don't worry about length at all (I'm in a crew cab)
I was not really aware the adapter and input gears were that rare or expensive.
Do I need to start picking them up around here for cheap(read; what the ignorant owners are asking for them around here) and put them up for sale? there are many up for sale right now on local classifieds here in SLC and fairly reasonably priced.
I'm just asking, I don't dabble in parts unless they are all ready mine.
I don't worry about length at all (I'm in a crew cab)
I was not really aware the adapter and input gears were that rare or expensive.
Do I need to start picking them up around here for cheap(read; what the ignorant owners are asking for them around here) and put them up for sale? there are many up for sale right now on local classifieds here in SLC and fairly reasonably priced.
I'm just asking, I don't dabble in parts unless they are all ready mine.
It's all relative, even the most expensive adapters are only worth a few hundred, we're not talking about aluminum big block Corvette motors. The long inputs were only in '85 and newer round pattern 205's, which practically only existed until '87 (yes, the crew cabs still had them but VERY small numbers), and there were a very small number in military ambulances (in figure 8 cases!).
The 400/205 adapters are probably less rare but some get broken and they are a desirable part that didn't really make it into a ton of trucks, maybe on par with front D60's.
I didn't know any of that.
I'll keep that in mind, next time I see one for sale that I can grill the owner for a few bones off the price.
I'll keep that in mind, next time I see one for sale that I can grill the owner for a few bones off the price.
sixb
1/2 ton status
Yeah that particular t-case doesn't pop up very often and there rarely cheap.
http://www.ksl.com/index.php?nid=218&ad=15075974&cat=594&lpid=&search=np205
Just got word from RCV Performance.
Sean their Engineer/Machinist is out at EJS. Kraig from RCV phoned him and he said they would have the shaft to me next week for sure!
Sean their Engineer/Machinist is out at EJS. Kraig from RCV phoned him and he said they would have the shaft to me next week for sure!
I am deploying in 3 weeks, but am definitely in for a group buy if that comes up as an option. I'll get in touch with you soon with my work e-mail! 
There is a smaller bearing available to use the 31/32 spline inputs in a 10/27 spline 205.
I don't know the part number, but when Wide Open Design built the 203/205 doubler that I put in my buddy's LC, we put a 31 spline ford input into the 27 spline 205 that came behind his th350. Dwight Woodlee said that is what they usually use instead of machining the cases.
You should be able to measure the bore and diameter and look up a bearing in a catalog.
I don't know the part number, but when Wide Open Design built the 203/205 doubler that I put in my buddy's LC, we put a 31 spline ford input into the 27 spline 205 that came behind his th350. Dwight Woodlee said that is what they usually use instead of machining the cases.
You should be able to measure the bore and diameter and look up a bearing in a catalog.
