Start again in the middle of Refurbishing a 05 plate range rover Overfinch 580s one with the bored out 4.4 BMW engine in it I have a problem with a vibration at all speeds but more noticeable at 50mph fitted a new torque converter about 6 weeks ago problem vibration nearly when but was still there any ideas am thinking in may need a rebuild on the gearbox ;( the people that fitted the torque converter landrover themselves changes the old but not the filter ? Could this be the Corporate or am a been a tad Optimistic ;0)
The main issue with the ZF box is the bearing between B & C clutches fails causing movement which wears out the O Ring sealing A & B clutches....this cause A clutch to slip causing a vibration.....the TQ then gives up as it is trying to limit slippage and the poor LUC fails in the TQ....
I would hazard a guess your A clutch is slipping.....
Photos by RRPhil
I would hazard a guess your A clutch is slipping.....
Photos by RRPhil
I hate to point you to another forum, but search for posts by a user called RRPhil on RANGEROVERS.NET HOME the guy is a ZF box genius and has posted superb threads about the ZF box vibration issues....
Just a quick update on this transfer box refurbed chain was slack new rear prop uj bad collapsed ;( rebuilt took for a test drive vibration nearly gone . Gear box out an striped valve block badley warn end bearing an seal was on it way out a Clutch casing was ####ed ;/ gearbox fully rebuilt an fully refurbed 
going bk in this mornin lets hope this mends its looks like u might of been right saint v8 thanks again
going bk in this mornin lets hope this mends its looks like u might of been right saint v8 thanks again
Hope the bill isn't to eye watering for you.....Just a quick update on this transfer box refurbed chain was slack new rear prop uj bad collapsed ;( rebuilt took for a test drive vibration nearly gone . Gear box out an striped valve block badley warn end bearing an seal was on it way out a Clutch casing was ####ed ;/ gearbox fully rebuilt an fully refurbed
