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MGB Differential Rebuilder Needed

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MGB Differential Rebuilder Needed
#1
glcaines Avatar
glcaines Gary Caines
Hiawassee, GA, USA   USA
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1968 Triumph MC Bonneville
1975 Norton Commando
I'm looking for someone in the Southeast that can rebuild my 1973 MGB tube-type differential. The car is drivable so I can take the car to the mechanic. The differential is very noisy. Alternatively, I'm looking for a replacement differential in very good condition for wire wheels.

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Re: MGB Differential Rebuilder Needed
#2
albeegreen1 Avatar
albeegreen1 Silver Member bob tresch
bordentown, NJ, USA   USA
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1972 MG MGB MkIII "ALBERT"
Gary, it wouldn't hurt to check out diesel tractor trailer repair shops. They may know how or be able to give you a contact.. Ring and pinion mesh is a very precisioned skilled art. Maybe John at Quantum mechanics can help or leed you. Someday this will be a headache for MGB owners as the supply of good used ones dry up. I just found a good replacement for my spares. Probably the cheapest route. Good luck.


PS. I have a contact in NC on a rolling shell.


"Only those who have patience to do simple things perfectly ever acquire the skill to do difficult things easily"
James J. Corbett



Edited 2 time(s). Last edit at 2024-04-08 05:14 AM by albeegreen1.

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Re: MGB Differential Rebuilder Needed
#3
ClayJ Avatar
ClayJ Silver Member Clay Johnston
Mt. Olive, MS, USA   USA
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1972 MG MGB
Least expensive route would be to locate a 68-75 wire-wheel Salisbury axle assembly.

First try would be local car clubs with MG members (Peachtree)

For salvage yards, might try Mathews in Birmingham, AL, McLeod in Maumelle AR, MidTown Auto in Syracuse NY, ...

For repairs check with local driveline shops, these usually cater to heavy commercial trucks, some do automotive work as well.

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Re: MGB Differential Rebuilder Needed
#4
Michael74MGB Avatar
Michael74MGB Michael Austin
Odessa, TX, USA   USA
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1974 MG MGB MkIII "Maggy"
I would also suggest a local off road shop. Jeep guys are always swapping out ring and pinions as they fit larger tires, so these guys end up with a lot of experience setting up rear ends. You may have to work with them on getting parts, and maybe tech specs, but as far as experience in setting up the actual meshing and preloads they should have that down pretty well as it's common to all live axles.


74 MGB: APT VP11 cam, lifters, valve springs; 9:1; ported head; TT exhaust; vernier timing gear; wizard aluminum radiator; dizzy by Jeff S.; stock HIF4's; it goes on and on.....

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Re: MGB Differential Rebuilder Needed
#5
i AMS 4u Avatar
i AMS 4u Platinum Member alfred dawes
Grimesland, NC, USA   USA
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1967 MG MGB "It's A Keeper"
1968 MG MGB GT "My First MGB-GT"
1968 MG MGB MkII "Is It 'A Keeper'?"
1969 MG MGB GT "My Second GT"    & more
First off,
1) What is the noise?
2) When is it loudest?
3) Does it change w/ road speed?
3) If you pull the emergency brake while maintaining about 40-50 MPH does the noise change? Meaning axle bearings could be bad noisy, if noise quietens.
4) Have you tested the driveshaft for u-joints stiff or WSO?
5) Have you tested the Pinion flange for loose rotational play, which could be axle gear shims WSO if clunking on /off throttle..


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Re: MGB Differential Rebuilder Needed
#6
saanich2006 Avatar
saanich2006 Robert Browning
Atlanta, GA, USA   USA
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1968 Chevrolet Corvette
1973 MG MGB
He is here in Atlanta (you said Southeast)

They specialize in British cars and do fantastic work and have been around forever

Neil Estes

Neil's Restorations

Address: 257 Dekalb Industrial Way, Decatur, GA 30030
Phone: (404) 292-9333


Oil leak?? What oil leak? That puddle under the car is just sweat from all that horsepower!!

Law of Mechanical Repair - After your hands become coated with grease, your nose will itch and you'll have to pee.



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Re: MGB Differential Rebuilder Needed
#7
glcaines Avatar
glcaines Gary Caines
Hiawassee, GA, USA   USA
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1968 Triumph MC Bonneville
1975 Norton Commando
In reply to # 4782693 by i AMS 4u First off,
1) What is the noise?
2) When is it loudest?
3) Does it change w/ road speed?
3) If you pull the emergency brake while maintaining about 40-50 MPH does the noise change? Meaning axle bearings could be bad noisy, if noise quietens.
4) Have you tested the driveshaft for u-joints stiff or WSO?
5) Have you tested the Pinion flange for loose rotational play, which could be axle gear shims WSO if clunking on /off throttle..

1. The noise is a grinding / screeching sound
2. It keeps getting louder the faster I go until I hit about 30-35 and then it stays about the same
3. See #2
3. Have not done that, but both axle bearings were replaced and didn't help
4. New u-joints didn't help
5. Differential was clunking. I replaced the shims myself which solved the clunking, but no help with the noise

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  i AMS 4u thanked glcaines for this post
Re: MGB Differential Rebuilder Needed
#8
glcaines Avatar
glcaines Gary Caines
Hiawassee, GA, USA   USA
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1968 Triumph MC Bonneville
1975 Norton Commando
In reply to # 4782725 by saanich2006 He is here in Atlanta (you said Southeast)

They specialize in British cars and do fantastic work and have been around forever

Neil Estes

Neil's Restorations

Address: 257 Dekalb Industrial Way, Decatur, GA 30030
Phone: (404) 292-9333
Thanks very much! I'll call him tomorrow. Guess what? I previously worked at a U.S. Steel research facility on Dekalb Industrial Way so I know right where he is located.

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