Tranny Hump? (1 Viewer)

Joined
Nov 28, 2009
Messages
988
Location
Boca Raton, Florida
 
 
Hey guys I have a 1970 FJ40 that I am putting a 78 4sp and t-case in. My question is my tranny hump is some what rusted. Will a later model tranny hump work in my 40 with the holes already cut or should I just cut up the old one and weld in new metal?

Thanks,
Preston
 

Living in the Past

SILVER Star
Joined
Apr 21, 2005
Messages
19,161
 
 
 
I installed a later transmission cover in my 68 back in the mid nineties when I installed a four speed. Not only did the shifter holes line up the cover is a little taller and a better fit in my opinion. I cut the back off to match the shorter earlier cover. Filled the gap in the back where it's taller with weather stripping, Then had to do a little work along the right side where it's a little different for the vacuum hump. Most hoes lined up.
 
Joined
Dec 4, 2002
Messages
1,420
Location
Hiding
 
 
 
I did the same thing, 71 tub with 77 hump. If I were to do it again, I would cut holes in your existing hump as it fits properly to begin with. Take the later hump and use it as a template, any smaller mistakes could be covered up by the shifter boots. Remember to only cut a little bit at a time.

The later humps are longer, (which I used) and had to cut off a decent portion of the back half. Most of the holes lined up for the smaller screws, but it was a pain and doesnt look or fit perfect. I rhino lined everything so it was somewhat a moot point.

FWIW the holes for the shifters on the later humps fit just fine without modification.
 
Joined
Nov 28, 2009
Messages
988
Location
Boca Raton, Florida
 
 
Thanks for the advice guys. Im going to take a bunch of measurements on a friends 76 and see if I cant use my 70 tranny hump first. Figure cant hurt to try that route first. Maybe even might try and make a template now that I think about it. Let you guys know how it goes when I get it all swapped in.
 

Living in the Past

SILVER Star
Joined
Apr 21, 2005
Messages
19,161
 
 
 
Here is a old thread from the 45 section. A couple of the pictures show how much taller the later 4 speed transmission cover is than the earlier three speed cover. This is the main reason I switched. Wasn't happy with the way the earlier cover fit when I installed the four speed. I also spaced the front motor mounts higher so the transmission was lower.

https://forum.ih8mud.com/fj45-class...save-virgin-cut-trans-tunnel-needed-fj45.html
 
Joined
Feb 7, 2011
Messages
89
SOR fiberglass reproduction tranny hump

Does anyone know if the SOR fiberglass reproduction will fit on a 71? They said it won't, but it sure looks like it will. They are calling out the hump to fit a 73 and later. I am not concerned about the shifter as I have the auto B & M set up.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top Bottom