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keg1

Transmission swap

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Besides bell housing and mounts does anything else need done when going from Mack trans to a Fuller?

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Drive shaft and stick 

Edited by fjh

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I thought I saw somewhere the pilot bearing needed changed or snap ring taken off. Didn't know if that was true or not. If so what holds it in?

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Your on to something with pilot bearing. I remember when I had fuller out we checked the pilot bearing and had to change it because whoever installed the fuller wasn't aware of difference. I think the difference was the input shaft didn't sit far enough in the pilot bearing . It was simple fix we just changed bearing but measured distance from bellhousing to input shaft to make sure it sat in there properly

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what years motor size trans torque 1o-5-13 12-5-13 the fist two numbers tells torque range Mack trans take 1800lbs torque 5-6-7-8-9-12 speed-do to the triplet counter shafts  older Mack produce a lot of power Eaton-fuller don't last long  GMC trucks have bell housing mounts

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The pilot bearing floats in the flywheel, nothing holds the new ones without snap rings.  Good idea to replace the pilot bearing, they tend to go bad from the clutch dust and such.

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I just changed my mack 2080 tranny to a eaton 8LL       I didn't change the pilot bearing       Had to shorten driveshaft and the rear from a 573 to 442 to maintain top end speed      not a bad job to do        love the difference in the truck

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Why?

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Why swap a near indestructible Mack for a Fuller that's going to require more shifting?

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the 2080 is a 8 speed  but more like a 5 speed if you will    the 3 lows I never use unless off road        when loaded I can take off in 1st high and only have 4 more gears to go        There is a big jump between gears      I would red line rpms and then grab next gear and she would fall on her face    almost like I skipped a gear       that's why the swap         a guy in pennsilvania did the same thing buy took a 2070 out and put a 2130  mack  tranny in        He said it was a big difference too   

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9 hours ago, TeamsterGrrrl said:

Why?

The reason WHY I'm thinking of doing it is you can get a fuller for about half the price of a Mack.  I had a fuller in my ch and didn't have any problems.

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Thanks for the replies.

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Luke, sounds like your Maxidyne engine may not be running right- It should have enough power to pull the next gear after an upshift, even at 1200 RPM. Perhaps a pervious owner swapped in a conventional torque rise engine or the pump off of one? Keg 1, the Fullers are cheap because there's so many of them laying around. 

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thanks for the feed teamstergrrrl    You are probably right about the running of the engine    Im sure is due for a overhaul      when I decide to do it id like to get it up to more like 350 to 375 horse      Any advice on how     I can sent you some pics of the engine and truck if you want to see it       Its a work in progress     I call it the    Big Stack Mack

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Do you need to swap the chassis mounting brackets to put Fuller in place of Mack or vice versa?

Just today looking my MH model frame (which should be similar to Suerliner) I noted those brackets the tranny housing seats on have only one rubber unsulator pad on each side of the truck. MH has Fuller 9 speed. On the other hand my R's with Mack T2090 have two pads on each side. Wonder what do MH/RW2 with Mack tranny have of them? 

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4 hours ago, Vladislav said:

Do you need to swap the chassis mounting brackets to put Fuller in place of Mack or vice versa?

Just today looking my MH model frame (which should be similar to Suerliner) I noted those brackets the tranny housing seats on have only one rubber unsulator pad on each side of the truck. MH has Fuller 9 speed. On the other hand my R's with Mack T2090 have two pads on each side. Wonder what do MH/RW2 with Mack tranny have of them? 

I was told Superliners and Mh have one bolt and R models have two. But the mounts on the trans are different between Mack and Fuller.

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the mounts on transmission are definitely different      on my dm I did not have to change the brackets on the frame        mine was a 2 bolt per side set up     

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19 hours ago, keg1 said:

I was told Superliners and Mh have one bolt and R models have two. But the mounts on the trans are different between Mack and Fuller.

So does it mean there are both one bolt and two bolt tranny brackets for every kind of transmission used on those Macks?

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On ‎12‎/‎26‎/‎2016 at 7:14 AM, keg1 said:

I thought I saw somewhere the pilot bearing needed changed or snap ring taken off. Didn't know if that was true or not. If so what holds it in?

Gray engine with Mack or Eaton trans--pilot bearing with snap ring 

Red engine with Mack or Eaton trans-no snap ring on pilot bearing

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16 hours ago, Challenger said:

Gray engine with Mack or Eaton trans--pilot bearing with snap ring 

Red engine with Mack or Eaton trans-no snap ring on pilot bearing

Thank you

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