Originally Posted by Casey
MERCON V is different from MERCON SP. You can't use MERCON V in a TorqShift without causing problems.
Casey is right on. Read your owner manuals.
Some transmission fluids may be labeled as dual usage, such as
MERCON and MERCON V. These dual usage fluids are not to be used
in an automatic transmission that requires use of the MERCON type
fluid. However, these dual usage fluids may be used in transmissions that
require the MERCON V type fluid.
MERCON, MERCON V and MERCON SP are not
interchangeable. DO NOT mix MERCON, MERCON V and
MERCON SP. Use of dual usage fluids in an automatic
transmission application requiring MERCON SP may cause
transmission damage. Use of a transmission fluid other than the
recommended fluid may cause transmission damage.