J & A Type Overdrives

[Tinkerman]

How can I tell which type I have?

Thanks, Tinkerman

 

[kodanja]

what year is your car?

 

[Tinkerman]

A post 60000 1960. It did not originally have an OD but the PO bought it and the proper tranny to go with it.(I hope). So what I have is two trannies and an overdrive.

Tinkerman

 

[TR6oldtimer]

Type A overdrives were used on TR's up to the early TR6's then the J type was used. The A type has a vertical external solenoid.
An article on rebuilding an A type.
https://www.vtr.org/maintain/TransRebuild/OverDriveA01.pdf

 

[TR4nut]

And look at the solenoid: vertical, A type - horizontal, J type.

Randy

oops, type too slow, Ray beat me to it.

 

[Tinkerman]

Yep, its vertical, Thanks a bunch.

Tinkerman

 

[TR3driver]

The A type has a vertical external solenoid.

Not all of them ... Stag A-types have the solenoid mounted horizontal. And since it's shown horizontal in the A-type service manual, I'd guess that either the Standard Vanguard or Triumph Renown also had it horizontal. Some Volvo units are also horizontal.

A more reliable identification is the finned rectangular cover held by 6 bolts on the bottom of a J-type; and the large (over 2") round brass plug on an A-type. Early units had a large hex on the plug, later ones had slots around the edge.

 

[Tinkerman]

Must be A-Type, have the drain plug with the slots on the side.

Tinkerman

 

[2wrench]

Beautiful pic, thanks.