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**aotte1** · 01-05-2021, 06:34 PM

Going to do this NV4500 install using stock bell housing, as outlined in this thread. This is a very helpful discussion. Below are starting photos. This application is 1966 GMC Suburban 4WD, divorced 221 TC. Bell housing is newer version. First photo is from thread. Circled holes are of interest as to how deep they can be. General rule on thread strength is, if they can be threaded as deep as diameter, then they will hold. In this case 1/2 bolt, with 1/2 thread depth will hold bolt strength. Also, will likely face top two holes in bell housing.
Again, thanks to Leon for sharing this information.

01-05-2021, 06:34 PM	#84
aotte1 Senior Member Join Date: Oct 2013 Location: lousiville Ky Posts: 2,637	Re: Installing The NV4500 5 Speed Overdrive Transmission In The C-30 Going to do this NV4500 install using stock bell housing, as outlined in this thread. This is a very helpful discussion. Below are starting photos. This application is 1966 GMC Suburban 4WD, divorced 221 TC. Bell housing is newer version. First photo is from thread. Circled holes are of interest as to how deep they can be. General rule on thread strength is, if they can be threaded as deep as diameter, then they will hold. In this case 1/2 bolt, with 1/2 thread depth will hold bolt strength. Also, will likely face top two holes in bell housing. Again, thanks to Leon for sharing this information. Attached Images Last edited by aotte1; 01-07-2021 at 08:31 PM.