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MG TD TF 1500 - Engine and Gearbox Compatabilities

The gurus amongst you should be able to confirm or deny what my limited knowledge base has revealed.

The MG Y Type gearbox is the same as a TC box? Are the ratios the same?

The MG Y Type engine is the same as the TC engine and is fitted with a 7 inch clutch?

Thanks in advance.

Graeme
G Evans

I am far from an expert.

I believe the Y-type trans is a TD trans with different shifter, and a reverse light. Same ratios, I think.

Y type engine is a standard XPAG engine, the YA, at least, with the earlier clutch. The single carb reduced the HP rating.

Tom Lange
MGT Repair
t lange



Graeme,

If you have not yet received a satisfactory reply, you might seek an answer from the Y-Type link.

Good luck,

Jerry

Jerry Chandler 1951 TD

From what I have seen of this Board I think Tom is very much an expert.
I am definitely not an expert and very much a newbie. However, I have read quite a lot about our lovely old cars and am sure that I read somewhere that the early Y type engine had a softer cam than either the TC or the TD engines.
Perhaps Tom or some other knowledgeable contributor will correct me.
Lionel Thorne.
L.F. Thorne

Tom Lange is correct. The TC, TD and TF all use a remote selector.

The Y-Type is direct and would likely foul under a T-Series dash.

I have a direct shifter, if anybody is interested

Gord Clark
Rockburn, Qué.
Gordon A Clark

Graeme - The experts on the Y types are here http://www.mgccyregister.com/ Cheers - Dave
David DuBois

Graeme

Neil Cairns has produced a history of MG Engines including the XPAG/XPAW engines. This is at the first link. It downloads as a Word document.

Link 2 is from http://www.mgccyregister.com/ and is a list of XPAG casting numbers. (Neil again)

Link 3 is from Neil Cairns again and details the T and Y-series gearboxes, including ratios.

http://www.mg-cars.org.uk/engine/mgenginehistory.rtf

http://www.mgccyregister.com/node/18584

http://www.mgccyregister.com/xpaggbnctg

He is a very knowledgeable bloke and has some interesting stuff on http://www.mg-cars.org.uk/imgytr/index.shtml , a lot of which can apply to Y or T-series cars

Ian
TF4056
Ian Fry

Thanks fellas especially to Ian Fry those links are "gold".

The reason I wanted this information is there is a Y Type shell with a very rough engine and gearbox up for grabs on "Aussie Fleabay" at present.Current bidding would have made it a very cheap source of back up parts for my TF if and when it turns up its toes.

Not really viable after receiving all your assistance.

Graeme
G Evans

Y type engines are more commonly put into TC's as they have the MG crest cast into the block as per TC. The only visible difference to a TC block is the position of the drain tap, it is at the forward end of the engine whereas the TC drain tap is directly behind the exhaust manifold (ouch).

The later Wolseley XPAW blocks are often put into TF's, they look the same. I am not sure what capacity they can be bored out to.
Max Irvine

Hi Graeme, I see that the Y bits are at $200 AUS. If I were down under I would be really interested. The engine alone is worth much more than this especially if the crankshaft is OK. Usually the gearboxes in Y types are in better condition that are those in a TD or TF. Even if you cannot use this type of gearbox in your car (you have a TC gearbox?) it is still valuable as a complete unit or for parts.
Cheers, Hugh
H.D. Pite

Thanks for your post Ian. Just reading the Neil Cairns Gearbox Rebuilding article (Link 3). Neil says;

"For instance a new lay-shaft (teeth often get broken off the first gear) will set you back twice what a supposedly scrap 'box will cost that has a perfectly good lay-shaft inside."

For the benefit of the novice gearbox restorer this is a typo. The layshaft is just a shaft that the cluster gear rotates on. A rod if you like. It has no teeth. It's the cluster gear that's toothed. This is the expensive bit of kit. The layshaft is comparatively cheap & should be replaced as a matter of course & it would be false economy to reuse one. I'm sure Neil is referring to the cluster gear. However I didn't know that the layshaft is also called the Second Motion Shaft. This makes the use of the terms First Motion Shaft & Third Motion Shaft so much clearer & provides a little more insight into the operation of a gearbox!

Graeme I just tried to find the Y you mentioned. I guess it must have gone. Cheers
Peter TD 5801
P Hehir

This thread was discussed between 27/02/2014 and 07/03/2014

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