Need a little help trouble shooting. The install went great with no problems, the ride from Stumps house was without issue and really nice having fifth gear. Got back in the truck Wednesday evening to drive it to the meeting, once i got up to speed (55 mph) started to feel a vibration. Got worse with speed but would totally disappear by taking foot off gas. Made decision not to continue driving all the way to Springfield. Once at home i checked a few things. Bolts from trans to bell housing, bolts on cross member,drive shaft bolts found nothing loose but vibration seemed to be worse on next test drive. Vibration started at 20=25 mph, still goes away when not on gas.
Chances are it is something from the trans swap and probably something simple but im running out of ideas on what to check. Its not a small vibration it can be felt and heard and its only when on gas (drive train)
Thanks for any input