BustedPinion
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anyone know what splines for th400 that what splines are on th400 version 203 & 205s are? are they all the same that are th400 version? :looser:
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th400 spline question
- Thread starter BustedPinion
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check out some of the info on www.offroaddesign.com
Excerpts:
NP205 input conversion Kit:
Convert your male input NP205 to a TH400 version 32 spline short female input gear. Kit includes new input gear, input bearing and a seal and gasket kit. Requires machine work on the NP205 case to install, the input bearing bore must be enlarged by about 3/8" compared to the small bearing. Gear, bearing, and seal and gasket kit also sold separately.
#GU4033 Price - $190.00
NP205 Input gears:
TH400 version 32 spline short input - $135
TH350 version 27 spline male input - $155 (used gears sometimes available, call for pricing)
SM465 version 10 spline male input - New or used gears available, call for pricing.
Divorced 32 spline input gears - used gears available, call for pricing.
NP205 transfer case adapter housings:
TH400 to NP205 figure 8 bolt pattern - $275 (New high strength aluminum)
TH350 to NP205 - $312 (New high strength aluminum)
SM465 to NP205 - $110 (good used factory cast iron)
Call for availability of used adapter housings
TH400 to 205 adapter shown below:
Excerpts:
NP205 input conversion Kit:
Convert your male input NP205 to a TH400 version 32 spline short female input gear. Kit includes new input gear, input bearing and a seal and gasket kit. Requires machine work on the NP205 case to install, the input bearing bore must be enlarged by about 3/8" compared to the small bearing. Gear, bearing, and seal and gasket kit also sold separately.
#GU4033 Price - $190.00
NP205 Input gears:
TH400 version 32 spline short input - $135
TH350 version 27 spline male input - $155 (used gears sometimes available, call for pricing)
SM465 version 10 spline male input - New or used gears available, call for pricing.
Divorced 32 spline input gears - used gears available, call for pricing.
NP205 transfer case adapter housings:
TH400 to NP205 figure 8 bolt pattern - $275 (New high strength aluminum)
TH350 to NP205 - $312 (New high strength aluminum)
SM465 to NP205 - $110 (good used factory cast iron)
Call for availability of used adapter housings
TH400 to 205 adapter shown below:
more
The TH400 was available with the NP203 in heavier duty trucks (3/4 and 1-ton generally) in approximately '78-'79. The factory configuration uses a 1 3/8" stickout 32 spline shaft in the TH400, a 32 spline input gear in the NP203 and a 1.1" adapter plate between the two, somewhat similar to the TH350 adapter plate. This is the shortest way to mate the TH400 and NP203.
Use a TH400 that originally had a NP205 behind it. This TH400 uses a 32 spline shaft that sticks out about 4.5". You'll need to use a factory TH400 to round pattern NP205 adapter housing that is 4" thick and once again, re-drill the front face of the NP203 to match the round pattern. The input gear will be the TH400 version NP203 32 spline input. Drawbacks to this system are the overall length with the 4" housing between the two and the expense of buying the factory housing. They're not common as used parts and typically must be purchased new. ORD can supply this adapter.
The TH400 was available with the NP203 in heavier duty trucks (3/4 and 1-ton generally) in approximately '78-'79. The factory configuration uses a 1 3/8" stickout 32 spline shaft in the TH400, a 32 spline input gear in the NP203 and a 1.1" adapter plate between the two, somewhat similar to the TH350 adapter plate. This is the shortest way to mate the TH400 and NP203.
Use a TH400 that originally had a NP205 behind it. This TH400 uses a 32 spline shaft that sticks out about 4.5". You'll need to use a factory TH400 to round pattern NP205 adapter housing that is 4" thick and once again, re-drill the front face of the NP203 to match the round pattern. The input gear will be the TH400 version NP203 32 spline input. Drawbacks to this system are the overall length with the 4" housing between the two and the expense of buying the factory housing. They're not common as used parts and typically must be purchased new. ORD can supply this adapter.
BustedPinion
-=BANNED=-
i have a th400 & 203... 203 has issues (growls / grinds in 4-HI) so i need either a shittastic 203 to replace or go 205, but i didnt know if there was a direct bolt on 205 for mine..
BustedPinion
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you said purchase, ok, the 203 will get replaced with 203, im poor :haha:Boxxerace said:
Sorry, I was mostly copy and pasting 
I too am having a hard time extrapolating the information from the info above as well.
Low and behold:
http://www.high-impact.net/transmission_and_gear/Tcase_NP205.htm
and
http://www.high-impact.net/transmission_and_gear/Tcase_NP203.htm
Both the np205 and the np203 behind a th400 are 32 spline. That answers your question, but brings up another. "Which 32 spline fits an np203?" My guess? I bet the short version of the np205 32 spline is the same as the np203 32 spline!
Just a guess though.
I too am having a hard time extrapolating the information from the info above as well.
Low and behold:
http://www.high-impact.net/transmission_and_gear/Tcase_NP205.htm
and
http://www.high-impact.net/transmission_and_gear/Tcase_NP203.htm
Both the np205 and the np203 behind a th400 are 32 spline. That answers your question, but brings up another. "Which 32 spline fits an np203?" My guess? I bet the short version of the np205 32 spline is the same as the np203 32 spline!
Just a guess though.
BustedPinion
-=BANNED=-
Boxxerace said:Sorry, I was mostly copy and pasting
I too am having a hard time extrapolating the information from the info above as well.
Low and behold:
http://www.high-impact.net/transmission_and_gear/Tcase_NP205.htm
and
http://www.high-impact.net/transmission_and_gear/Tcase_NP203.htm
Both the np205 and the np203 behind a th400 are 32 spline. That answers your question, but brings up another. "Which 32 spline fits an np203?" My guess? I bet the short version of the np205 32 spline is the same as the np203 32 spline!
Just a guess though.
Hmmm if the 203 version shaft is too long, than i have a sawzall :flipoff: Kenny W is who i need to ask, he is a adaption guru!
