allison mt645cr wont upshift past 2nd - Printable Version

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+--- Thread: allison mt645cr wont upshift past 2nd (/showthread.php?tid=9063)

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allison mt645cr wont upshift past 2nd - meltdown - 08-16-2026

Hi all. Fluid level checked and at the correct level, no discoloration and or burnt smell. Ihave not found a manual specific to this particular transmission. I di find SM1317EN. Nothing there about upshift failure. Is this controlled by mechanical linkage from the injection rack? Or another means.
What are general upshift blocking issues on this transmission? Rhank you All.

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