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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - 4.3:1 Diff conversion

Can I use a 4.3 banjo diff from an early MGB for the conversion of an original TD diff.
Thanks...John
J Walton

I'm not sure John. The early B & the MGA 4.3 C & P are the same & these do fit into the TD banjo. You will need an MGA pinion flange. Google Virgin Rear End Conversion. I had mine done at Craft Differential here & purchased the components from Cambridge Motor Parts in England. This was the best deal on parts that I could find anywhere in the world. I also have a copy of Carl Cederstrand's article that I can lend to you. Cheers
Peter TD 5801
P Hehir

John

Dont know if you are familiar with this doco:

http://www.mgccsa.org.au/Front%20Page%20Files%20%28New%29/Interchange%20between%20MG%20&%20others.pdf

No mention of MGB diff components being transferable however provides some interesting options if you can find the vehicles mentioned.

Graeme
G Evans

John

Here is a very explicit answer to your question:

http://www.mg-cars.net/mgtd-mgtf1500-bbs/mgb-final-drive-gears-2010103110513312916.htm

Graeme
G Evans

Never saw a 4.3 in an MGB here. 3.9 is the only ratio I've seen. I have a banjo rear on the shelf from an early MGB and it's a 3.9. 4.3 and 4.1, to my knowledge, were only in the MGAs. Don't know about ratios in other models. PJ
Paul161

4.3 also in early B's PJ. Cheers
Peter TD 5801
P Hehir

Didn't know that Peter, thanks for the info. PJ
Paul161

Thank you all for your help.
John...Sydney
J Walton

Surprised to learn that the 4.3 was fitted to an early MGB - certainly not here in North America. CWP for both banjp and split axle diffs (TD/TF/MGA/MGB/Magnette) all interchangeable (but not Y-Type)


I have published the below chart several time on this forum, but it never hurts to do it again ...

A LIST OF INTERCHANGEABLE CROWN-WHEEL AND PINIONS, FOR ALL MGs, FROM THE TD TO THE MGB

CW-P Ratio Teeth P to CW Application MPH/1000 RPM RPM @ 1 mph

5.455 9 : 49 Opt TD

5.125 8 : 41 Std TD 14.80 67.530

4.875 8 : 39 Std TF & ZA/ZB 15.57 64.236

4.556 9 : 41 Tunung Opt for TF 16.66 60.027

4.300 10 : 43 Std MGA 17.65 56.659

4.100 10 : 41 MGA MK II 18.51 54.024

3.909 11 : 43 Std. MGB 19.41 51.509

3.727 11 : 41 Opt MGB 20.36 49.113

If this isn't clear, ask me for a copy in Excel.

Gord Clark
Rockburn, Qué.
Gord Clark

Gord,
Would you be good enough please to send a copy of the above in Excel.
Many thanks,
John...Sydney
J Walton

The following is from the invoice I received in 2011 from Cambridge Motor Parts in England.


MGB 4.3:1 CWP Banjo Axle 294.50
100897A TR pinion bearing inner 1 28.04
Spacer diff MG Banjo 1 20.85
Bearing pinion outer MG Banjo 1 20.55
88G320 Oil seal 1 2.39
FNZ612 Nut 2 3.90
WL600121 Washer 1 0.59
ATB7066 thrust washer 1 5.77
ATB7102 thrust washer 0.004" 1 1.06
ATB7103 thrust washer 0.006" 1 2.54
ATB7104 thrust washer 0.008" 1 1.19
ATB7105 thrust washer 0.010" 1 1.32
ATB7106 thrust washer 0.012" 1 1.58
ATB7107 thrust washer 0.020" 1 1.65
Bolt crown wheel 8 7.84
CW diff bearing MG TD/TF 2 36.94
GHB158 bearing 2 35.66
266-040 lock tab 4 25.96

Unless this is a typo it shows the 4.3 CWP was also fitted to an MGB. I had heard prior to ordering that the MGA 4.3 was also fitted to the early B. I didn't need all of the thrust washers but got them anyway so I could be sure I had the thickness that was needed. I still have those that were not required. Also got 2 nuts so that the one used during the test assemblies could be discarded as suggested by the Atlanta gurus. Prices are in English pounds. Diff was rebuilt by Craft Differential in Sydney. Cheers
Peter TD 5801


P Hehir

Thanks Peter.
John
J Walton

John

Glad to oblige, but where do I send it? Send me an e-mail at the address at the left.

Gord Clark
Rockburn, Qué.
Gord Clark

Gord - In your list you might want to add that the 4.875 ratio was also standard in the Mark II TD.

Tom Lange
MGT Repair
t lange

Gord,

I believe the YB used the '52 and later T axles. That is why there is a triangular tab out by the springs on all but the '51 axles. That was used for the YB shock mount. Also the 1951 T axles are BSF case studs and drain plug.
Dave

Dave Clark Arizona

Dave,

Will check it out.

I do know however that there were 6 Y-Types ordered by Ferguesson Motors in Toronto that were made to order, for the Canadian market that were complete with late TD running gear, including magnetic instruments. I've seen one that belongs to an acquaintance, and know of the location of another.

Ergo: its entirely possible that the TD split axle also found its way on to a Y-Type.

Gord Clark
Rockburn, Qué.
Gord Clark

This thread was discussed between 09/05/2016 and 22/05/2016

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.