I have board 484M & 551C b4... seriously, last time when
551C perm on 334 (If i'm not wrong), not ZF gear le... maybe they
change recently i guess ?
I didnt know 497B is a ZF merc... o.O
484M and 551C I have no problems...
I knew 497B was a ZF but when I boarded it on 194 some time ago,
can't tell its a PURE ZF. Acceleration gear is
ZF, but after that comes some wierd & funny sounds that doesn't
tell me if it's a ZF at all. 
If you want to know what is ZF, try 3899E. If you don't
want to know what is ZF, try 414R. =D
SBS 2717D
(BNDEP SP
BNDEP 23) Convert 1 ADD to 1 ASD
SBS 9486Z
(BNDEP 23
BNDEP 58) Convert 1 ASD to 1
ADD
SBS 3652A
(BNDEP 58
BNDEP SP)
SBS 9045M
(AMDEP SP
AMDEP 58)
SBS 0151Z
(AMDEP 58
AMDEP SP)
SBS 0421U
(AMDEP SP
AMDEP 52)
SBS 0414R
(AMDEP 52
AMDEP SP) Pending transfer...? Throwing ZF
to SL ah...
SBS 8368M SBS 8369K
(AMDEP SP
AMDEP 162)
SBS 0457S SBS 2625K
(AMDEP 162
AMDEP SP) Unsure if 0457 go BRBP.