GT40s.com - View Single Post - Inversion ZF 5DS-25/1 transaxle and bell housing

Brian Magee · 12-13-04, 04:58 AM

Hi Didier
To answer your first question as to why most people don't use the 25/1 box is that they are extremely rare and therefore don't appear very often. I had never heard of a 25/0, all the boxes fitted to the original cars had an NR prefix to the number, maybe these are 25/0. Also the early boxes can be identified by not having the extended side plates and cross bolts in the 'top' cover. Just to confuse things, my box is from an early Pantera and is a 25/1 with the extended plates and cross bolts!. With regard to inverting, try and get hold of a ZF 'Assembly, Maintenance and Operators Manual'. In it you will see that there is a small trough under the gear cluster that directs oil through to the crown wheel. This is only fitted to the box when used with the removable cover plate to the top, (the correct way up!).Also the side plates that hold the output shaft bearings have to be modified to allow the oil into the top and the existing ones now at the bottom should be filled in. Apart from reversing the crownwheel, the only other thing to do is to drill a few holes into the bottom of the wall between the main gearbox and the crownwheel housing to allow the oil to flow through.

Hope this helps.

Brian.

12-13-04, 04:58 AM	#5 (permalink)
Brian Magee Brian Magee Bronze Supporter Join Date: Sep 2001 Location: Newbury England GT40: GTD Posts: 437 Rep Power: 12	Re: Inversion ZF 5DS-25/1 transaxle and bell housing Hi Didier To answer your first question as to why most people don't use the 25/1 box is that they are extremely rare and therefore don't appear very often. I had never heard of a 25/0, all the boxes fitted to the original cars had an NR prefix to the number, maybe these are 25/0. Also the early boxes can be identified by not having the extended side plates and cross bolts in the 'top' cover. Just to confuse things, my box is from an early Pantera and is a 25/1 with the extended plates and cross bolts!. With regard to inverting, try and get hold of a ZF 'Assembly, Maintenance and Operators Manual'. In it you will see that there is a small trough under the gear cluster that directs oil through to the crown wheel. This is only fitted to the box when used with the removable cover plate to the top, (the correct way up!).Also the side plates that hold the output shaft bearings have to be modified to allow the oil into the top and the existing ones now at the bottom should be filled in. Apart from reversing the crownwheel, the only other thing to do is to drill a few holes into the bottom of the wall between the main gearbox and the crownwheel housing to allow the oil to flow through. Hope this helps. Brian.