turbo 400 into NP205, need adapter!?

[bullets72]

I have a 72 K5. I'm taking the Th400 out of my rolled 85 K20 truck that was mounted to a NP208 and adapting it to the OEM 205 off the blazer that was mounted to a TH350. I have been told that the adapter housing was a factory GM part to adapt the two cases but it is hard to find. I have also been told that there is no factory part, and I would have to spend the $485 for the conversion Kit from Advance Adapters. Does anyone have this part or know where I could get one? What other 205 mods are reccomended? /forums/images/graemlins/k5.gif

 

[j20m715]

Dont use A/A they are a waste of good money.
Call up Ord they can fix you up.

 

[kennyw]

Might want to ask this question in one of the 4x4 related forums and it might get better response /forums/images/graemlins/ignore.gif /forums/images/graemlins/thumb.gif

 

[kennyw]

You are going to need to change the 205 from 27 spline (TH-350) input to a 32 spline (TH-400) input. Contact ORD for the kit to do that.

Next the adapters are probably not in production anymore by GM and you will need to search for a used TH400-205 adapter.

Another problem may be the out put shaft length on the tranny itself. I believe there are several versions depending on the tcase used for the TH400 and dont think the NP208 and NP205 versions are the same. UglychevyZZ4 has a TH400 in the for sale forum that came with the NP205 (but he already sold the adapter and 205).

 

[mudjunkie 82]

Check ebay, some times there on there.Also check boycee equipment they sell them. Around 180.00

 

[doctor4x4]

EXACTLY WHAT KENNY SAID
AND YEA the out put shaft is usually different on the stock LENGTH 400-208 then on the 400-205