Possible Transbrake Issue

[M Brand 505B]

This weekend I raced my girlfriend super comp dragster and ran into issues of inconsistency. When the weekend started I attempted to back the dragster out the trailer and the transbrake wouldn't engage. We tested power going to the transbrake and that was fine so we swapped the Hughes Solenoid HP7498HD for a BTE Solenoid 2498 and walla it worked. The first time run the dragster ran a 4.84 with a 1.08 60' but then first round it slowed to a 4.91 with a 1.105 60'. The dragster should have only slowed .005 so when I got back to the pit i checked the valves and all looked fine. The next morning I made another pass and it ran a 4.99 with a 1.13 60' when it should have ran a 4.82.

Do you think the different size transbrake (BTE 2498) can cause the issue of inconsistent/slow 60's which turns into slow ET's? Is there a way that the solenoid can get stuck in the trans causing it to release slow and inconsistent?

Thanks for any help.