Hi everyone. I have the usual leaking issues from the gearbox and about to put her on a set of ramps. Changing the sump seal for a nice new rubber one and the inhibitor (due to a leak and sticking issues) does not appear to pose much of an issue, but need a bit of advice on the Gear shaft seal as it looks like a bit of a so and so to change. Any advice on how to remove the old seal while in situ? Thanks in advance. John.
Grind something to a nice sharp gradual point (I always used a pushrod, but they were readily available to me) stick it into the seal and prise it out. The problem comes when putting the new seal back in as there is a step on the shaft which tends to roll the seal edge outwards distorting the seal. To do it properly you need to make a protector to go over the shaft and protect the seal. If you can't do that, buy more than one seal, because although it can be done without, you may need more than one go at it.
You need to clean the gearbox casing off, white spirit and paper towels. Then pack paper towels on the ridge that the sump attatches to. That will give you an idea of where the fluid is leaking from. On mine it actually came through the inhibitor switch. There was also a pin hole where the switch screws in that was leaking. The rear housing can also leak. Do not over tighten the sump bolts - 8lb/ft, which is not much more than finger tight
What Harvey said. Plus be careful with the sharp tool not to scour where the seal runs in the case. I use a 1/2" socket to tap the seal in once it's gone over the threads. Lots of rubber grease. You can 'roll' the seal over the shaft, making sure the internal lip doesn't catch. Try to get a rubber-backed seal, as they make a steel-backed one that isn't as forgiving. Don't use RTV sealant on the pan gasket.