645B Transmission Parts

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   I have a 645B that the transmision is slipping in both low and high foreward, and a 645 that is slipping only in reverse.  Can anyone tell me if there are new parts available for these transmisions still?  And where might I source them.  They are both allison transmisions, but when I called Wajax here they told me that they call these twin disc transmissions and they no longer handle them.

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Amos Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Ontario Points: 1318	Post Options Post Reply Quote Amos Report Post Thanks(0) Quote Reply Topic: 645B Transmission Parts Posted: 11 Nov 2024 at 6:44pm
	I have a 645B that the transmision is slipping in both low and high foreward, and a 645 that is slipping only in reverse. Can anyone tell me if there are new parts available for these transmisions still? And where might I source them. They are both allison transmisions, but when I called Wajax here they told me that they call these twin disc transmissions and they no longer handle them.

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DougG Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 20 Sep 2009 Location: Mo Points: 8124	Post Options Post Reply Quote DougG Report Post Thanks(0) Quote Reply Posted: 25 Nov 2024 at 6:20pm
	You may try Kwik Parts out by kingdom City- Fulton Mo; they are a spin off of Oscar Cooke Allis Chalmers construction equipment dealership out of Fulton ,,

orangeman Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Points: 1771	Post Options Post Reply Quote orangeman Report Post Thanks(0) Quote Reply Posted: 30 Nov 2024 at 2:45pm
	Amos - Check the tag on the transmission if it is still on there. The 645 and 645B should have an Allisson TT Soft Shift Transmission. I don't believe that Twin Disc had anything to do with building the Allison Transmission. Perhaps these folks could help - see link here:https://catalystpowertrain.com/allison-off-highway-tt-trt-series/ ~ Orangeman

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8283	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 02 Dec 2024 at 12:03pm
	Old Allis dealer told me the slipping was likely a bad sprag.

Amos Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Ontario Points: 1318	Post Options Post Reply Quote Amos Report Post Thanks(0) Quote Reply Posted: 03 Dec 2024 at 3:03pm
	Steve, I have three allis chalmers loaders, the 645B slips in all gears , torque temperature really goes up high if you drive it down the road in second for more than a half mile. I am thinking its likely the converter or a leak someplace internal. however my trans pressure is the same as it has been for a decade. My 645 has great first and second, will push a loaded train easy, but won't back over a 6x6 piece of blocking. I figure there is something smoked or leaking on the reverse clutch side of it. The 545 just pushes anything or spins the tires. Twin Disc are the parts supplier now for these transmissions I have been by my detroit allison dealer