Turbo 350 NP205 Leak

[leatherhead63]

did a search and found the same advice. Thanks.

[hdflstf]

Actually there are 3 seals. Been there done that. There are 2 seals on the outside diameter of the coupler (these are the likely leak path). Pay attention to the direction they are installed since they are backwards from what you would normally see.
Third seal is a thick o-ring on the NP205 input shaft which seals with the inside diameter of the coupler.

[Chevy1TonFun]

Originally Posted by hdflstf

Actually there are 3 seals. Been there done that. There are 2 seals on the outside diameter of the coupler (these are the likely leak path). Pay attention to the direction they are installed since they are backwards from what you would normally see.
Third seal is a thick o-ring on the NP205 input shaft which seals with the inside diameter of the coupler.

Yep thats true. I just did that on my th350 and 205.

[leatherhead63]

I see I;m not the first. Thanks for the good info. Just got it back on the road. will most likely wait a week or two before tearing it down. Need to fix or replace a leaky power steering gear box first.