• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

Replace rear differential gasket?

zschicago

Freshman Member
Offline
My rear diff is leaking. Whats it take to replace? Trying to decide if I should take it to a shop instead of doing myself. cheers,
 
D

Deleted member 8987

Guest
Guest
Offline
Boy, rear diffs are very difficult to fix.
Front ones are real easy on these cars, however.
Too bad it's not the front one.

You sure it's the gasket and not the pinion seal?

Been a lotta years since I did one, but it's a drop out third member isn't it?

You have to pull the wheels, pull the axle shafts, drop the driveshaft, unbolt the thrid member, drop it out the front.

Usually it's the pinion seal, but if you think it's the gasket, that's what you have to do.
 

Michael Oritt

Yoda
Gold
Country flag
Offline
Zs--

Where exactly is it leaking? If it is at the pinion seal you can repair that without pulling the differential unit by picking the seal out from the front.

If it is leaking from around the flange of the differential unit perhaps you will only need to replace the paper gasket and torque down all the nuts evenly. Maybe it is just the drain plug?

Or is it leaking from somewhere out toward the hubs--a whole nother experience.

It is not hard to isolate and accurately locate the source of the leak. Come back to us with more information and we'll take it from there.
 

TimK

Jedi Knight
Silver
Country flag
Offline
I would be really happy if the only leak I had was the differential. Mine doesn't leak, but everything else does -- transmission, rear main, front seal, steering gear, etc.
 
OP
zschicago

zschicago

Freshman Member
Offline
You guys got me thinking. I really didnt notice a leak until after I replaced the oil in the diff a few months ago. It could be the drain plug. I didnt have the correct tool for that square plug. So I improvised. Any idea where I can get that correct tool? cheers, Zane
 

Michael Oritt

Yoda
Gold
Country flag
Offline
Sounds like you need a smoke wrench.
 

GregW

Yoda
Platinum
Country flag
Offline
Another option would be cutting a piece of 7/16" square bar and putting it in a 7/16" 8 point socket. This one is for a 1/2" ratchet.
 

Attachments

  • 19071.jpg
    19071.jpg
    43.7 KB · Views: 413
D

Deleted member 8987

Guest
Guest
Offline
If I recall, 'tis.

If you have the ability......find a piece of 7/16" square stock about, oh, 12-14" long.
Clamp about 1.5 to 2" in a vise, heat it cherry red with an oxy-acetylene torch, BEND the long part to 90 degrees, let it cool, de-burr the edges, and you now have a tool you can keep in your toolkit.
 

Michael Oritt

Yoda
Gold
Country flag
Offline
You can also use a 19 mm 12 point socket to remove a 1/2" square fill plug--I just did it today when I changed my diff oil.
 
Similar threads
Thread starter Title Forum Replies Date
jfarris TR2/3/3A Rear Shock and link remove and replace Triumph 1
AngliaGT Easiest Way to Remove/Replace Rear Axle Seals/Etc.? Spridgets 9
drooartz MGB-GT Any gotchas when remove/replace rear axle? MG 4
P how to replace rear main seal in 1500 midget Spridgets 2
boxfullofyertoys Front and Rear Springs...Repair? Replace? Spridgets 12
B Help to replace 3000 leaking rear axle oil seal ? Austin Healey 25
K TR2/3/3A TR3 Rear Bush Replace Pic from More BS aboutTR's Triumph 5
A Clutch Replacement + Rear Crank Oil Seal Replace? Austin Healey 8
MadRiver Anyone replace the glass in a rear view mirror? Triumph 1
J MGB Front Wheel Bearings. Re-grease or replace? MG 19
K TR2/3/3A Wiring a voltmeter gauge to replace the ammeter. Triumph 1
V MGB Replace late intake manifold angled breather with early model straight? MG 1
W replace rigid master cylinder lines with flex. Spridgets 2
K TR2/3/3A Can anyone confirm that if you replace the ammeter with a voltmeter ( generator removed and alternator added) that you...... Triumph 5
BoyRacer Replace BN1 steering box with later version? Austin Healey 0
B A plan to replace BE floor pans Spridgets 0
nichola TR6 Rebuilder or replace wiper switch? Triumph 7
R TR2/3/3A Replace wiring harness in steering column Triumph 61
mrv8q TR2/3/3A Brake master cylinder: rebuild or replace? Triumph 9
K TR2/3/3A Time to replace the exhaust header wrap.... Triumph 2
R TR4/4A Master Cylinder Corrosion Do I replace? Triumph 4
J TR2/3/3A replace brake and fuel lines? Triumph 4
J TR2/3/3A Replace rusty sills? Triumph 10
NutmegCT Brake fluid - flush and replace. Why? Restoration & Tools 8
F Dynamo not charging [BT7] - replace brushes or buy new? Austin Healey 24
JPSmit replace shocks in pairs? Spridgets 7
JPSmit When do you replace things? Restoration & Tools 22
wangdango BN2 wheel cylinders/rebuild/replace? Austin Healey 3
AUSMHLY When to replace spark plugs Austin Healey 1
drooartz MGB What to replace when engine is out MG 10
71TR6 TR2/3/3A Inner sill or floor pan- which to replace first? Triumph 5
G TR2/3/3A Hydraulic supply lines from reservoir..replace with flexible Triumph 19
AHS BJ8 blower motor switch - how to replace? Austin Healey 1
R TR2/3/3A Replace Upper Wishbone Ball Joint Triumph 4
R TR2/3/3A Replace Rubber bushings in front suspension Triumph 11
R TR2/3/3A Replace Upper Wishbone Ball Joint Triumph 15
TRMark TR4/4A Replace Water Curtain Triumph 5
H Bugeye fuel tank sending unit - repair or replace Spridgets 5
John_Mc TR6 Rebuild or replace Clutch Master Cylinder? Triumph 8
S Replace original suspension for shocks? Austin Healey 2
J Replace the outside skin on a cargo trailer??? Restoration & Tools 0
drooartz MGB Good people go to heaven, bad people replace MGB clutch hydraulics MG 2
7 How to replace door windows on a 77 MG Midget Spridgets 6
AngliaGT '74 Midget - Best way to Replace Brake Line? Spridgets 1
S Replace seal and dust cap BJ8 steering box. Austin Healey 23
gbtr6 TR6 TR 6 Head Studs, replace? Triumph 3
J TR2/3/3A What is the best way to remove and replace carb shaft bushings. Triumph 4
B Radiator - repair or replace? Pics attached Austin Healey 20
Lukens TR2/3/3A Water pump bearings making noise... time to replace Triumph 9
mailbox General Tech Fix, replace or rewire? Triumph 8

Similar threads

Top