Case 310 crawlers suffer from the same problem at Oliver Cletrac HGs and OC3s. That because they use the same Clark transaxle with a fast 1st gear.
The Case crawlers that use torque-oonverters don't have that problem.
It's also why having a aux. transmission makes a world of difference.
Case 310 - 1st gear at full throttle is 1.8 MPH
Cletrac HG/OC3 - 1st gear, full throttle - 2 MPH
HG/OC3 with aux. in 1st low - .6 MPH
The Case 310 is a little better since the final-drives are geared a little different.
Compare to a Deere of Oliver OC4
Deere 420-440 .85 MPH in 1st
Oliver OC4 (with low range) .8 MPH in 1st