Truck way too fast

[Bill 832]

Hello fellas! My Knight Hauler, now that I finally have it done, is too fast, especially in reverse. I am never gonna get good at backing this thing, if it goes warp 6 in reverse. I got an HPI 55 turn crawler motor, that just came in, and it is a closed end motor, non rebuildable, like the Tamiya motor, and has a capacitor. Will it work good with my MFU? Before I tear my done truck apart and put this thing in, I want to know it will be worth it. Also, I have to pull up the MFU unit itself to get the deck off, and I would like to know about the shock absorbing tape. Can I use regular two sided? Of course I didn't order any of the shock absorbing stuff, and I will if I should, but I've got gobs of the regular stuff around. Thanks, Bill