What's involved in converting a 4 speed to a LT77 gearbox?

[Cobber]

Anyone tried the transmission jack adapter that goes on the normal trolley jack?

I have one, though I've not used it on the TR, so I cant tell you if it's any good for our cars, but I've used it on others and found it a quite cumbersome due to the combined height of the jack and adapter.
The problem is that you need to get the car fairly high to get the gear box out from under the transmission tunnel, it's more use for commercial vehicles in my opinion.
Considering the height needed you may as well use a proper car hoist instead and be able to stand up under the car instead of grovelling about on your back.

[john 215]

Hi,

dursleyman wrote:
Anyone tried the transmission jack adapter that goes on the normal trolley jack?

I welded my own up but you always have the issue of how it high it ends up, unless you have a low entry jack. The type you buy can be very specific to jack manufacture too.

If you do the five speed conversion dont scrap the old stuff, I can always find a home for it, espically the axle, mines singing like a bird at high speed and cant be ar53d to rebuild it !

Cheers John

[march]

John,

When I get around to this I will actually have 2 4 speed axles going begging as the car I will be scrapping also has 4 speed axle, if they are of use to you they are yours.

We are lambing at the moment ( = sleep deprivation torture & no time for anything not sheep related) so all car related activity has stalled for the present but if you are desperate I may be able to get one off a car in about a month.

[john 215]

Hi,

That's very decent of you, thank you very much. No rush whatsoever, I realise must be a very busy time of the year for you guys, just let me know.

Thanks again,

John

[rosey]

There are some interesting stories here, I got a 4 speed TR7 fhc in 1978 and the diff whined even then, I was always looking for a fifth gear on the 80 miles a day commute to Nottingham but I was young and she was my pride and joy so I put up with it.
Wind forward to 2010 and I got the chance of another fhc from someone on this forum that needed the engine rebuilding and the bodywork sorting, I did that and put it back on the road, great but oh that *#%ing gearbox and back axle, it belongs on the Morris Marina and that's where it should stay IMHO.
I swapped the gearbox and back axle for a five speed and passed on the old kit to someone renovating a 7 in SW France, the FHC I have now feels like a different car and I don't care if it's not a four speed and they may become rare because I don't want to drive one.
I swapped the gearbox and back axle in my council garage with some decent axle stands, 2 trolley jacks from Aldi, assorted bits of wood and some threaded bar to align and pull together the gearbox and engine.
All you need is ingenuity, willpower and basic tools but the overriding desire is to put a decent gearbox in the car so it's a pleasure to drive again over longer distances I.e. 10 miles as that was about my limit

That's my twopence worth on the subject for what it's worth.

Dave

[John_C]

And then there's my car still sporting its lighter and quicker 4 speed gubbings. It's all properly sorted and makes no noise at all - at any speed. It just goes to show that it can be done.

The problem is the differential and if you are lucky enough to get one built properly then your troubles are over.