Manitou 90 deg angle gearbox drives have been about for many years now in various models and although they have had a few improvements over the years they still have a few common issues but the two i most commonly see are,
1st Is the big nut on the main shaft behind the torque converter, these often work loose. This then wears the splines of the supporting flange and also lets the converter float in an out of the transmission oil pump which can damage the pump and converter. Also will leak 90 deg gearbox oil out in to the bell housing.
2nd The Hydraulic pump bolts to the back of the 90 deg gearbox and is driven via a set of splines off the main shaft. These splines are common to wear causing excessive rattling at low engine speeds and under load. Given time the spines will wear through and a total loss of hydraulics and steering will occur.
I currently have several brand new 90 deg gearboxes part number 224053 in stock on a special offer of £1250 plus vat (£2400rrp), these are not exchange units or rebuilds! They are new units with all the latest improvements. (plus 2 of my own improvements/modificatations i can add if required)
Dealer/trade enquiries are welcome and additional discount is available depending on number of units purchased.