I have a Tr3 and TR4, both have overdrive on 2nd 3rd and 4th gears.
Over 50 years of driving these cars I have learned to pop the clutch as I am shifting into Overdrive.
This smooths the change  to overdrive and takes the strain away from gearbox and overdrive during the change to higher ratio.
No need to use clutch when switching out of overdrive.
Really have enjoyed watching your restoration journey.
The TR4 is a simply engineered and in my opinion, a beatifully styled car that will give you a smile on your face everytime you drive it out on the open road.
The final result will be worth the effort.
Great to see the old guy and the young gun working so well together.

Thanks so much for that video on adjusting the O/D solenoid! I followed what you did and now my overdrive works perfectly!!!

My TR4 engages O/D smoothly and immediately.  perhaps check the oil pump, particularly oil viscosity perhaps.  I have to use a slight trailing throttle to disengage  smoothly however. Perhaps that is wear, I don't know.  What a terrific job you are both doing so far.  your clips have been really informative.

I just can't wait for you guys to get rid of that 2x4

That small jerk when you turn the OD on is normal as I remember from my MGB days. Love your show BTW.

Wow way to go that is a great achievement  I never thought you guys could pull it off congrats it’s like giving birth .

Just come across your videos. Great stuff, watched about 20 back-to-back. Clear descriptions and nicely delivered. I'd second the comments about easing off the gas slightly when engaging OD.

Were done!!  What's next!!

Nice work!

I am glad to use metric system , buddy ! 😂

Well thought thru 👍

Great Video, really helped with our overdrive problem, same as yours it turns out.  All working now.  Thanks

I am in the middle of converting a non-OD TR6 to OD, and your videos have been helpful and entertaining. Thank you for taking the time to share!

I had the same problem with overdrive in my 2000TC. It was easily fixed by topping up gear box oil to the correct level.

The best way is to use youre clutch before you use the overdrive. 🤗

A small jerk is normal having owned TR4's and TR6's with OD - you learn to slightly back off the throttle when OD engaging and you can smooth it so almost imperceptible. Practice makes perfect.

Overdrive on my TR-2 and 3A has a slight jerk too. Your car looks great!!

and to add have always had engagement on 2nd, 3rd and 4th as mentioned by another fan below. Makes the whole setup very versatile when driving in city limits.

Good job guys, yeah you get a bit of a jump when the OD engages.  Normal.

nice good work boys also interior needs some work i have a big roll of carpet you can use real nice old shag i think you guys would like it!