Leaky NP203 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

danadena1960 · 12-17-2003, 02:11 AM

I have a 1977 K-20 with a NP203. I have been going through it and changing seal after seal after seal. On the transfer case where the speedometer cable housing connects to the case there is a union that the driven gear spins in. It has a oil seal that is the same except a little bigger then the one that is in a regular "Bullet" of a automatic transmission. Anyway, I can't seem to find one anywhere, does anybody have any ideas on this matter?

12-17-2003, 02:11 AM	#1
danadena1960 Registered User Join Date: Aug 2003 Location: Stockbridge, GA (Suburbs of Atlanta) Posts: 126	Leaky NP203 I have a 1977 K-20 with a NP203. I have been going through it and changing seal after seal after seal. On the transfer case where the speedometer cable housing connects to the case there is a union that the driven gear spins in. It has a oil seal that is the same except a little bigger then the one that is in a regular "Bullet" of a automatic transmission. Anyway, I can't seem to find one anywhere, does anybody have any ideas on this matter?



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