Trans swap almost complete

[Raven9]

I have almost finished my 8LL swap into my 78 R600L dump truck. The only issue are the transmission mounts. I have a set on it, of course only one hole is good, the other is a half hole. 

Does anyone have a source on a set of mounts that would line up, or am I just going to need to drill the holes out. 

The 8LL is a 2000 RTO came out of a  Mack garbage truck from what I was told. mine is the ol twin stick 5x5.

Thanks in advance for the reply's!

 

[67RModel]

Thinking objectively, I think a 600 series Mack with an Eaton transmission from the late 70s was quite scarce then. Probably like hens teeth now. I have little knowledge of the various Eaton transmission iterations, however, I wouldn't be surprised if the mounting locations on a late 70s Eaton are not the same as a 2000s era unit. That is to say even if you could find the correct factory mounts that line up with your frame holes they might not line up with the transmission. My guess is you are going to end up making what you have work via drilling and/or fabricating. My guess is it has been done many times over the years. Seems like many people who end up with an old Mack are looking to dump the Mack trans and swap in an Eaton.

[mowerman]

im thinking the same way,,,,i would take the mounts to a reputable machine shop,,,,,,,,if nothing else save alotta time and leg work,,good luck,,bob

[Raven9]

Thank you for the replies! I would have kept my twin stick if they still made parts to fix it, it just isn't efficient trying to work and your aux box wont release out of reverse even tho it clicked out lol

For anyone else doing the same swap as me in the same truck here is what I did for the cheapest and right route.

I did end up drilling the frame mounts, had to stretch the drive shaft 2in. front u joint had to be changed to a spicer 5-676x which is two for straps two for bolt caps so I didn't have to change the rear yoke or my driveshaft, thank the lord! Clutch bracket was all the same as its cable driven, Only had to take a couple inches to the right and back on floor for the stick to clear in all gears, All  that is left is to reroute the dump lever as its hitting the speedo plug, and she's ready roll. 

I would like to find a speedometer out of 2000 or so truck so it would work, or what would  really be nice if someone made a gps speedo to install in the same place as the original.... wishful thinking

In closing, like I have read on here, everyone said try and get a trans out of a Mack, its the best advice you'll get when taking on a project like this. I priced out both options, mack trans vs non mack trans and it was almost double to put a non mack trans in. 

So far I'm into this swap under 5k, which being on a tight budget I did most the work myself. I am glad I didn't listen to a friend and just go buy a fuller, everything would have had to been fabricated.

Again thanks for all the help everyone on this forum had provided. 

[mowerman]

Excellent thanks for all your updates sounds like you about got it wrapped up … bob

[mowerman]

Hell, yeah it’s 5000 is not a whole lot of money for anything on these big boys you should be good for a while hopefully I have a brand new speedometer and a box I bought around 1988 for something that I never used. I’ve been waiting for somebody that needed one.