Rebuilt 727, no Reverse

OK so with a MVB does it have an engine braking low? If not 1st those are kinda dangerous, but drive it and let us know to what G Jones asked. Could be several things buddy.

If no 3rd no reverse uses same clutch stack, but I have seen weak 3rds and no R as a result of masive pressure loss onthe servo. MVBs run much higher pressue in most all cases and I have broken more than 1/2 dozen of the pistons, ripped seals etc.

Who makes the VB?