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New Old Guy with an MG TD suspension question.

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New Old Guy with an MG TD suspension question.
#1
RVN6768 Gary Holyoke (New Member)
Lutz, FL, USA   USA
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I have stripped, non repairable, threads on the driver's side spindle. My research says the early MGTDs had a 5/8" BSF thread on the spindle and the later model TDs have a 3/4" NSF thread on the spindle. Are the rest of the parts interchangeable? My TD has brass trunions top and bottom with what was a 5/8" BSF thread on the spindle. The unit I have located appears similar but has cast Iron trunions top and bottom and 3/4" NSF threads on the spindle. I don't care if I have mixed size castle nuts on each front wheel. I just don't want to start tearing into everything and find out this new (70 yr. old) suspension unit I located won't fit. Other than the differences I have mentioned they appear the same. I'm retired and always loved the look of the TCs and TDs and got this one to restore to a decent driver. All my MG experience was with a 1958 MGA as a high school kid back in 1966, and MGB and an MGBGT. After that, Mustangs and Corvettes. Thanks for the help>

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Re: New Old Guy with an MG TD suspension question.
#2
LaVerne Avatar
LaVerne LaVerne Downey
Fruita, CO, USA   USA
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1954 MG TF "Green Hornet"
1969 MG MGB "The Beater"
1979 Triumph TR8 "Turd 8"
The iron trunions came on MGA's but they function the same as the brass ones that came on the car originally and I believe that is all that is available new. Just make sure you get the correct nut for the drivers side spindle as it is a left hand thread...which probably explains why the one you have is jacked up. The steering arms on an MGA Spindle assembly are different so be aware of that fact.



Edited 2 time(s). Last edit at 2024-04-10 09:08 PM by LaVerne.

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Re: New Old Guy with an MG TD suspension question.
#3
Steve S Avatar
Steve S Gold Member
Abingdon, So Cal, USA   USA
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1925 Ford Model T
1937 MG SA Saloon
1939 Ford V8
1946 Other Not Listed    & more
As far as I know they are identical other than the nut size. I have a very nice set of spindles if you need some, complete with trunions and steering arms.

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Re: New Old Guy with an MG TD suspension question.
#4
hueyhoolihan Huey Hoolihan
Antioch, CA, USA   USA
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good information....

BTW, just in case you don't know. although the left front spindle, as noted, has a left hand thread, the REAR wheels a right handed on BOTH sides. ...strange but true.

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Re: New Old Guy with an MG TD suspension question.
#5
RVN6768 Gary Holyoke (New Member)
Lutz, FL, USA   USA
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Who knows what goes on in the minds of those UK folks. Thanks for the info. I didn't know that. I wonder what the rationale for that one was.

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Re: New Old Guy with an MG TD suspension question.
#6
RVN6768 Gary Holyoke (New Member)
Lutz, FL, USA   USA
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Thank you for the info!

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Re: New Old Guy with an MG TD suspension question.
#7
tdmidget Scott P
Tucson, USA   USA
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What is an "NSF" thread? A search shows NSF as the National Sanitation Foundation.

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Re: New Old Guy with an MG TD suspension question.
#8
GB3 George B
Winter Haven, USA   USA
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The rear axles and drums attached and turn together, hence just a big nut and cotter pin. Unlike modern cars, the front washer under the nut has no tab and mating slot in the stub axle to keep it stationary. The ideas was that if the washer began to turn from wear or friction and wore though the cotter pin, the nut would unscrew on the left front. Hence left hand thread. George

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Re: New Old Guy with an MG TD suspension question.
#9
TD4834 Avatar
TD4834 Bill Chasser
Sacramento, CA, USA   USA
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1950 MG TD
1951 MG TD
1951 MG TD MkII
1952 MG TD MkII    & more
I’m not sure I understand your statement George. That washer is inboard if the castle nut with the cotter pin outboard if the nut.


Bill Chasser
TD-4834
TD-5779
TD/c-8151
TD/c-16920
TD-19408
TD-24060

TF-8200

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Re: New Old Guy with an MG TD suspension question.
#10
RVN6768 Gary Holyoke (New Member)
Lutz, FL, USA   USA
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My mistake, I meant National Fine threads. I spent too many years in the Plumbing Industry. smiling smiley

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