Join Date: May 2005
Thanked 60 Times in 44 Posts
Thanks J! I've been doing research on installing a Dmax in a Suburban, but going about it in a whole lot easier way than the fabricators currently doing the swap. (They replace the entire front frame section.) I had assumed that GM used offset frame mounts on the HD diesel chassis, while gassers used even-spaced mounts. So the question was originally, how to move the pass. side mount.
I was over at DmaxalliTech's shop yesterday, and he has a truck-sans-engine that he working on. This gave me the opportunity to give the frame a much closer inspection. With Eric Stanley's help, I found I may not have to move the frame mounts. I had already done a "map" of a gasser 3/4 ton frame earlier last week, and I found that the two frames are darn close to identical. If there are any big differences, he and I cannot see them. The width between the rails is exactly the same, the frame mounts are the same, the engine mounts are the same style, etc, etc..
What we did find is that it looks as though GM may have just used offset engine mounts on the Dmax! The right one is offset to the rear, the left is offset to the front. This gives a total offset of about 4 inches. This is good news if correct!
I WILL keep in mind what you said, because I will still probably have a need for the info!
Next up....figuring out just what exactly IS the "2 inch body lift" that GM adds to the HD's for the Allison. It sure isn't the rubber donut mounts...