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wilkin250r · 01-21-2012, 11:35 PM

From what I recall, the 700R4 output shaft is a little longer than the TH350 output shaft, but they're both 27-spline shafts. Lots of people make adapters for various transmission to bolt to an NP203 because the doubler kit is so popular, but I don't know any that make a specific 700R4 to 205 adapter.

The rear bolt pattern for the 700R4 is the same as the TH350, but the output shaft is longer. So you could replace the output shaft with a specialty shaft that makes it identical to the TH350 output, and then use stock components. The output shaft is less than $200, but it requires a transmission rebuild.

The other option that I've heard about (but haven't seen personally) is to buy a specialty adapter used for replacing a TH350 with a 700R4, then cut about 1/4 inch off the output shaft of the 700R4, and life is golden.

01-21-2012, 11:35 PM	#4
wilkin250r Registered User Join Date: Sep 2010 Location: Lake Tahoe, Nevada Posts: 755	Re: Will a 700r4 matchup to a NP205? From what I recall, the 700R4 output shaft is a little longer than the TH350 output shaft, but they're both 27-spline shafts. Lots of people make adapters for various transmission to bolt to an NP203 because the doubler kit is so popular, but I don't know any that make a specific 700R4 to 205 adapter. The rear bolt pattern for the 700R4 is the same as the TH350, but the output shaft is longer. So you could replace the output shaft with a specialty shaft that makes it identical to the TH350 output, and then use stock components. The output shaft is less than $200, but it requires a transmission rebuild. The other option that I've heard about (but haven't seen personally) is to buy a specialty adapter used for replacing a TH350 with a 700R4, then cut about 1/4 inch off the output shaft of the 700R4, and life is golden.