The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Titomars · 07-12-2015, 04:26 PM

The speedo Sleeve (what the cable actually screws onto) has 2 seals. One is an o-ring the seals the sleeve to the trans case. the 2nd is a small lip seal the seals the speedo gear to the sleeve. You can see both with the sleeve and gear out. I would assume both are available through Napa or GM.

Taken from the 73 to 78 parts book.
TH400 sleeve to case seal= 6264904
all others except K series, sleeve to case seal= 6264903
speedo gear seal= 3869910

07-12-2015, 04:26 PM	#2
Titomars Registered User Join Date: Feb 2015 Location: Santa Rosa, Ca. Posts: 539	Re: transmission quesstion/ Speedometer The speedo Sleeve (what the cable actually screws onto) has 2 seals. One is an o-ring the seals the sleeve to the trans case. the 2nd is a small lip seal the seals the speedo gear to the sleeve. You can see both with the sleeve and gear out. I would assume both are available through Napa or GM. Taken from the 73 to 78 parts book. TH400 sleeve to case seal= 6264904 all others except K series, sleeve to case seal= 6264903 speedo gear seal= 3869910 __________________ 1977 Chevrolet C/10 Silverado. Step-Side, Factory 454, TH400, 3.73 Posi 12 Bolt. 1975 Chevrolet El Camino. 350, TH400, 3.08 Posi 10 Bolt.