Diff drain plugs

[jimmy86]

Just a quick question about drain plugs in the diff housing... The two Rover front axles I have both have 2 drain plugs (as well as the filler plug on the diff casting). One at the lowest point in the diff housing and one on the front face which I assume is at the correct fill level. But the 2 rear axles I have are different (both 2A). One only has a single drain plug at base, and one has this plus a second hole (roughly 1/4" dia and threaded but not plugged) drilled in the diff housing like the two front axles. Hope that all makes sense :D

Question is what is the drilled hole for? Is it an amateur job with a powerdrill?:( And why do some diff housings have a second plug while others don't?

If anyone can shed some light that'd be great,

Cheers, Jimmy

[HangOver]

maybe used to be a hole for an airline for lockers? check your diff you never know you luck !:D

[JDNSW]

Series 2/2a diffs have a level plug on the pinion carrier on the rear diff, and a level plug on the front of the front axle housing. All axle housings have a drain plug on the bottom. Salisbury axles (rear option on late 2a 109, but often fitted to earlier 109s off S3s) have a level plug on the back cover plate.

Some, but not all, front diffs have the level plug on the pinion carrier. Where one of these (or a Rangerover one without the level plug) is fitted to the rear of a 2a, it is necessary to make some sort of level plug in the axle housing, and this may well be smaller than the original one in the front axle.

All Series 2/2a axles have a threaded hole in the top of the long section of the axle housing for a breather.

Hope this helps,

John

[jimmy86]

maybe used to be a hole for an airline for lockers? check your diff you never know you luck !:D

haha True you never know :D Don't think so though... but I'll let you know!