MG Midget 1275 Differential (3.9)
Discussion
Hi All.
I have been suffering from a noisy diff for quite a few years now and have changed the diff oil a couple of times, then added some Moly-Slip into the diff casing, which made no massive difference in the noise. The noise is ok less than 40 mph. The car is an MG Midget 1275 from 1971, and I have owned it for nearly 10 years. Last summer I had the gearbox overhauled and I rebuilt the engine myself and bought new carbs.
This year I am going to attempt to address the diff issue, so looking around for ways to do this seemed to be massively expensive, so I decided to try pot luck and get a reasonably good looking one off E-bay, which I did for £140 (3.9 ratio) visually this looks ok, with no visible wear to the teeth. I did spot a split fibre thrust washer in two pieces under one of the sun wheels though.
Now, for the actual question: I was thinking of simply cleaning it and putting it straight in for a try, or should I change the oil seals, thrust washers or measure the pinion to crown wheel back lash?
Has anyone done a walk through on this? And how on earth if I change the pinion oil seal and pre-load the spacer at the front?
I am fairly experienced on engines and have a good workshop; it’s just that I have no experience of stripping or rebuilding a diff.
I have been suffering from a noisy diff for quite a few years now and have changed the diff oil a couple of times, then added some Moly-Slip into the diff casing, which made no massive difference in the noise. The noise is ok less than 40 mph. The car is an MG Midget 1275 from 1971, and I have owned it for nearly 10 years. Last summer I had the gearbox overhauled and I rebuilt the engine myself and bought new carbs.
This year I am going to attempt to address the diff issue, so looking around for ways to do this seemed to be massively expensive, so I decided to try pot luck and get a reasonably good looking one off E-bay, which I did for £140 (3.9 ratio) visually this looks ok, with no visible wear to the teeth. I did spot a split fibre thrust washer in two pieces under one of the sun wheels though.
Now, for the actual question: I was thinking of simply cleaning it and putting it straight in for a try, or should I change the oil seals, thrust washers or measure the pinion to crown wheel back lash?
Has anyone done a walk through on this? And how on earth if I change the pinion oil seal and pre-load the spacer at the front?
I am fairly experienced on engines and have a good workshop; it’s just that I have no experience of stripping or rebuilding a diff.
try asking on the MG BBS Midget and Sprite Technical forum - http://www2.mgcars.org.uk/cgi-bin/gen5?runprog=mgb...
Gassing Station | MG | Top of Page | What's New | My Stuff