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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: seventy5GMC on August 12, 2015, 12:44:41 am

Title: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: seventy5GMC on August 12, 2015, 12:44:41 am

Hello
wondering if anyone can help, my bellhousing for my sm465 has 4 main boltholes to attach the tranny,Ive got the bellhousing bolted to an engine stand with the tranny attached. Theres a fifth threaded hole on the very top of the bellhousing which I cannot remember what bolts to it. this top hole sits above the trans so I'm guessing is part of the wiring harness bolted to this?
any help is appreciated.
thanks

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: Captkaos on August 12, 2015, 12:11:21 pm

You got a picture? 

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: zieg85 on August 12, 2015, 12:38:19 pm

If the picture is what you have it is the newer dual pattern bell housing from a 81 on up

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: seventy5GMC on August 13, 2015, 12:59:18 am

I have what is called GM #6263756,,,it has 5 holes,but my sm 465 has only 4,there's and extra hole at 12 oclock. its a through hole thats threaded, ??

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: Captkaos on August 13, 2015, 01:21:06 am

That PN is for a 12" clutch/pressure plate for Trucks trans.  You don't need the 5th hole on the SM465.

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: seventy5GMC on August 13, 2015, 01:37:24 am

thanks for the reply! is it best to fill the hole with a bolt anyway?

Title: Re: 75 3/4 ton gmc sierra sm 465 bell housing
Post by: Captkaos on August 13, 2015, 01:44:37 am

I would probably plug it.