74M35A2
Well-known member
- 4,145
- 330
- 83
- Location
- Livonia, MI
Thanks on the T-case check. Interesting.
OK, so I have some basic dimensional data to compare the stock Allison MT654CR automatic 5 speed to the Fuller RTO-12513 13 speed trans. The 13 speed dual countershaft trans lists as 3/4" shorter, 3/4" wider, and 7.5" shorter on height. The Fuller weighs 70 pounds more. I need to double check the width dimension, as the Allison info may have included the bell housing? If not, then we are good to go I don't see any clearance issue. If anybody has their trans out or is crawling under their truck today, take a tape measure and grab the width of the trans, not including the bell housing. Otherwise I will do it later this evening. Thanks.
The 13 speed fuller has a large 4 bolt clutch inspection window of which a hydraulic release actuator is available to be used for, and is available used for low cost, even an air assisted one I believe as an option, to reduce pedal force. Volvo and Freightliner both used a hydraulic clutch, so parts are available, new and used.
OK, so I have some basic dimensional data to compare the stock Allison MT654CR automatic 5 speed to the Fuller RTO-12513 13 speed trans. The 13 speed dual countershaft trans lists as 3/4" shorter, 3/4" wider, and 7.5" shorter on height. The Fuller weighs 70 pounds more. I need to double check the width dimension, as the Allison info may have included the bell housing? If not, then we are good to go I don't see any clearance issue. If anybody has their trans out or is crawling under their truck today, take a tape measure and grab the width of the trans, not including the bell housing. Otherwise I will do it later this evening. Thanks.
The 13 speed fuller has a large 4 bolt clutch inspection window of which a hydraulic release actuator is available to be used for, and is available used for low cost, even an air assisted one I believe as an option, to reduce pedal force. Volvo and Freightliner both used a hydraulic clutch, so parts are available, new and used.
Last edited: