8.8 Master Housing Dimension?

[R.J.]

Does any body know what the Master Housing Dimension is for an 8.8 in Rear end? My Proform Pinion Depth Tool came with a list of MHD’s and it said 4.420. I have read two other online sources that say the MHD for an 8.8 is 4.419 or 4.415?? This .001-.005 would matter when shimming a pinion. Does anybody know what the Ford manual says?

 

[1987stangman]

Ford 8.8 is 4.415"

This is the site I used when I did my first gear change. Must use FRPP gears, which you already know.

Installing Gears by

I have set up 4 other sets of gears using this method without using a PDT and had absolutley no gear noise. My 87' GT was my first and has well over 25k on it by now.

 

[R.J.]

That is one of the articles that I am referencing. The MHD method in this article says that the factor dimension for the 8.8 is 4.415?

 

[1987stangman]

Thats what it says and thats what I have lived by since. I wonder if a trans or driveshaft shop would have some sort of offical Ford litature on it? I really never knew that there were more than one MHD number.

 

[R.J.]

Well I e-mailed Currie, Richmond and Mark Williams Enterprises (Three Huge Rear End/Gear Companies) and they all said that the MHD for the Ford 8.8 is 4.415. So now I have to call Pro Form and ask them why they put 4.420 on their directions.

 

[R.J.]

Pro Form is researching the issue. I have to call them back in a week.