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TR6 TR6 tranny
- Thread starter LarryB
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Marvin Gruber
Yoda
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Larry,
I have put a TR6 tranny in a TR3 so it should go the other way. You know you won't have a syncronized first gear.
Marv
I have put a TR6 tranny in a TR3 so it should go the other way. You know you won't have a syncronized first gear.
Marv
TR3driver
Great Pumpkin - R.I.P
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It is possible, but IMO not a good idea. The tranny was beefed up several times (even before increased torque of the 6 cylinder engine).
Not certain, but you may have to cut down the input shaft just a bit. It got shorter, although I'm not sure why offhand. But ISTR the pilot bearing moved closer to the gearbox at some point, so it may be the long shaft would bottom against something. A TR6 box will rest flat on it's face on the floor, while a TR3 box won't.
The front cover of the gearbox (where the throw-out bearing carrier rides) also has to be cut down for use with the diaphragm clutch. The smooth portion should be only 2" long, not 2-3/8" as the TR3 was.
If it's from an earlier car than TS50000, then you'll also want to do something about filling the gearbox in the car. TR2-early 3A had a dipstick in the top cover and a hole in the bodywork for access; but lacked the fill hole in the side of the gearbox. I'm not certain, but it may be that the center console blocks where the bodywork hole would be on a TR6.
I assume this is non-OD. There may be other issues with installing an A-type OD in a late TR6. The OD itself was modified for use with IRS as well.
Not certain, but you may have to cut down the input shaft just a bit. It got shorter, although I'm not sure why offhand. But ISTR the pilot bearing moved closer to the gearbox at some point, so it may be the long shaft would bottom against something. A TR6 box will rest flat on it's face on the floor, while a TR3 box won't.
The front cover of the gearbox (where the throw-out bearing carrier rides) also has to be cut down for use with the diaphragm clutch. The smooth portion should be only 2" long, not 2-3/8" as the TR3 was.
If it's from an earlier car than TS50000, then you'll also want to do something about filling the gearbox in the car. TR2-early 3A had a dipstick in the top cover and a hole in the bodywork for access; but lacked the fill hole in the side of the gearbox. I'm not certain, but it may be that the center console blocks where the bodywork hole would be on a TR6.
I assume this is non-OD. There may be other issues with installing an A-type OD in a late TR6. The OD itself was modified for use with IRS as well.
TR6oldtimer
Darth Vader
Offline
Lost of work as previously stated. Why chance blowing the three trany just to have overdrive.
Sell or trade the TR3 OD transmission and get one designed for the TR6. I am sure there are TR3 guys out there who would pay the price.
Sell or trade the TR3 OD transmission and get one designed for the TR6. I am sure there are TR3 guys out there who would pay the price.
TR3driver
Great Pumpkin - R.I.P
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Sorry, I missed the "OD" in the original post.
Another thought might be to put the OD from the TR3 tranny on the TR6 box. He'll need the TR6 mainshaft, and I'd suggest the uprated adapter plate from John Esposito (who will also sell him the shaft); and it would probably be best to convert to the TR6 style accumulator (which gives softer shifts to avoid shocking the IRS).
Randall
Another thought might be to put the OD from the TR3 tranny on the TR6 box. He'll need the TR6 mainshaft, and I'd suggest the uprated adapter plate from John Esposito (who will also sell him the shaft); and it would probably be best to convert to the TR6 style accumulator (which gives softer shifts to avoid shocking the IRS).
Randall
TR3driver
Great Pumpkin - R.I.P
Offline
Yup. At least if you're only driving on the street.
If it's originally from a Triumph, the serial number on the unit will tell you if it originally had the smaller accumulator piston. But since they interchange to some extent (and the smaller piston is one way of saving the housing from a certain type of damage) the only way to know for sure is to have the piston out.
According to the Moss catalog, the solid axle 4A still had the earlier OD.
If it's originally from a Triumph, the serial number on the unit will tell you if it originally had the smaller accumulator piston. But since they interchange to some extent (and the smaller piston is one way of saving the housing from a certain type of damage) the only way to know for sure is to have the piston out.
According to the Moss catalog, the solid axle 4A still had the earlier OD.