Rob-Michigan
Freshman Member
Offline
Hello,
Last summer I bought a nice 1959 TR3a with a bad original gearbox. I ordered a reconditioned one with overdrive from an East Coast company. It promptly arrived and appears to have all I wanted, four speed synchro, OD and new replacement parts including clutch and related hardware. The fellow who sold it to me told me he also, as requested, installed it with a TR4 bell housing which apparently has a thicker flange to mount to the engine, better for more horsepower should I want it. This TR4 bell, he said, will require re-boring of the rear mounting bolt holes. It also had the switch, relay, solenoid for the OD with one wire attached and two wiring harnesses; an upper and a lower. With it was a sheet showing some information about how to wire the relay.
I’ve begun to remove the old transmission but before I do, I want to fully understand how to wire up the new one. My problem is that I don’t really know which wires go where. I have a couple of diagrams and I made photos of the harnesses. I have noted colors of the wires and need to know what goes where. I sent the photos to the fellow I bought it from but over the months I guess he has had some personal issues and I just can’t pin him down. I’d like to get the job done so if someone can help I would be very grateful. The vertical wing image with the colored wires (third from left) is one I found from a post here on the forum and, I think, holds the most promise. The car has no reverse lights and one of the harnesses may be from a TR6. I’ll attach the images.
Cheers,
Rob
Last summer I bought a nice 1959 TR3a with a bad original gearbox. I ordered a reconditioned one with overdrive from an East Coast company. It promptly arrived and appears to have all I wanted, four speed synchro, OD and new replacement parts including clutch and related hardware. The fellow who sold it to me told me he also, as requested, installed it with a TR4 bell housing which apparently has a thicker flange to mount to the engine, better for more horsepower should I want it. This TR4 bell, he said, will require re-boring of the rear mounting bolt holes. It also had the switch, relay, solenoid for the OD with one wire attached and two wiring harnesses; an upper and a lower. With it was a sheet showing some information about how to wire the relay.
I’ve begun to remove the old transmission but before I do, I want to fully understand how to wire up the new one. My problem is that I don’t really know which wires go where. I have a couple of diagrams and I made photos of the harnesses. I have noted colors of the wires and need to know what goes where. I sent the photos to the fellow I bought it from but over the months I guess he has had some personal issues and I just can’t pin him down. I’d like to get the job done so if someone can help I would be very grateful. The vertical wing image with the colored wires (third from left) is one I found from a post here on the forum and, I think, holds the most promise. The car has no reverse lights and one of the harnesses may be from a TR6. I’ll attach the images.
Cheers,
Rob
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