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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Fairlane514 on July 23, 2012, 08:06:45 pm

Title: 700R4 speedometer adaptor seal
Post by: Fairlane514 on July 23, 2012, 08:06:45 pm

Anyone have any luck with part numbers for the "O" ring and the small seal?

I have NAPA, Oreilly, Advance auto and Auto Zone near me. 

Title: Re: 700R4 speedometer adaptor seal
Post by: bd on July 23, 2012, 08:43:30 pm

Speedo sleeve O/R, GM/AC Delco P/N-15552872
Speedo driven gear seal, GM/AC Delco P/N-1361618

Be sure to check the driven gear and sleeve for wear; that's usually what causes them to leak.

Title: Re: 700R4 speedometer adaptor seal
Post by: Fairlane514 on July 23, 2012, 09:30:27 pm

Thanks for the numbers, hopefully I will have it pulled tomorrow and I will know which drive gear I need.

Is the sleeve a replaceable part, or do I need to get the whole adaptor assembly?

Title: Re: 700R4 speedometer adaptor seal
Post by: bd on July 23, 2012, 10:01:32 pm

The sleeve (driven gear support) is serviceable.  There are two P/Ns with different offsets, depending on the number of teeth on (diameter of) the driven gear.