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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: 1BAD77K10 on September 30, 2010, 09:42:14 pm
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hey everyone, got some questions about doing a tcase swap and trans swap. my truck right now is set up with a sm465 with a np205. i also have on hand sittin in my shop a th350 with np203. the truck is gonna be a mud racing street truck. and the 4 speed while fun to drive and extremely strong is not favorable for racing. the question that i have is can i take the the np203 off of the th350 and replace it with the np205 from the sm465. the th350 np203 is from a 79 and the sm465 and np205 is from a 77 chevy. i want to keep the np205 but want a automatic. the trans that i have is fully rebuilt and race ready so i would rather not let it go to waste. if anyone needs anymore info on either combo just let me know. thanks
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Output spline count on the SM465 is not the same as a TH350. You would need to replace the input shaft of the NP205 with the same spline count / size as a TH350.
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or find a 205 off a th350 the sm465 will have 10 splines and th350 will have 27 the only 205 that has 27 splines if off a th350