LT77 gearbox overhaul. Part 1 - stripping the box
ฝัง
- เผยแพร่เมื่อ 21 มี.ค. 2018
- How to overhaul a LT77 gearbox - this was a box I rebuilt about 6 years ago and it has been on my shelf a while
I saw some rust on the clutch bearing tube, so I thought it would be a good idea to strip it and explain how to overhaul it
You do need some special tools if you do not want to damage the parts - years ago I was doing a lot so I took the plunge and bought what I needed $$$$!
As TH-cam have moved the goals to become monetized, and I have a niche channel, funding is never going to happen, so I have set up a Patreon as I would like to get a higher speed upload, which means I get post more videos, AND in 1080
Takes me about 2.5 hours to upload a 15 minutes at the moment.
I will be giving credits to my supporters at the end of my videos from now on. I am very grateful to one and all!
/ britrest
You can now support me on PayPal if you like this particular video!
paypal.me/britrest2018
If you have a pre 2005 Land Rover problem and do not know how to fix it, drop me a line! Maybe I can help!
britrest@britrest.com - ยานยนต์และพาหนะ
I enjoy watching this guy work even though I do not do any mechanic work any more. It's so informative.
Thanks!
Mike
Another great video Mike!. I love your little tips you use, there is only so much a workshop manual can tell you. These videos really help. Thanks.
Thank you!
More to come..
Mike
Thank you for this excellent video.
Excellent video 👌👌
These videos!
The best ever!
Thanks Eric!
After watching you it's worth giving you a shout out to our subscribers.
Thanks I would appreciate that!
I get about 50% of my hits from the UK, but ironically, the North American side is pretty lean
I have a link to your channel on the related videos, but I will try and make it a permanent link.
Mike
I live in Texas and spend many hours watching LRTV and find this channel exceptional. Thank you both!
Thanks Stephen!
I think we both agree the workshop manuals are somewhat vague, especially the Haynes manuals - they have the technical details which we need, but actually doing the jobs are lacking in practical details.
I don't have a Haynes manual on hand, but I believe they do not cover stripping Defender gearboxes any more - maybe because of the tools required.
And this is the problem with modern Land Rovers - the cost of specialised tools and computer equipment needed, means it is dealer (stealer) only workshops able to repair even the most simple of jobs.
Mike
I’m also a Patreon of Chris at toolbox and between the two of you there’s not much you can’t find out, I just wish more subscribers would donate to keep these videos alive. So a big thank you to both of you for your time and professionalism. Awesome. Jeff
Hi very, very useful. I'm in the middle of a strip down now, I'm making rough pullers out of threaded rod and scrap. This box looks ok generally but there was a lot of end float particularly on the layshaft. I'm concerned about some corrosion pitting on the layshaft driven gear what's your thoughts on this.
Pitting is never good = what is the box serial number? I have some old stock LT77 layshaft - laying about
@@BritannicaRestorations Hi thanks for getting back to me its 50A0036039G. The end float was caused by the rear mainshaft and layshaft bearing outer races turning in their housing and burrowing outwards. Seen that one before? I'm thinking new bearings, shim and centre pop the bearing recesses and give them a dose of bearing adhesive.
Hi Mike. I’ve just just took apart the lt77 transmission on a 1990 defender and the damage is in 3 different gears. I am in Mexico and I have called different suppliers in the United Kingdom but they currently do not have the spare parts. Could you suggest me please if I can replace the gear box with another one or any solution on how to repair the damaged gear teeth? I thank you very much in advance for your suggestions
What parts do you need, and what is the gearbox number? I have lots of used parts here britrest@britrest.com
Mike, what's your opinion on "gearbox (oil) cooler" assembly (which is NOT installed on my R380 gearbox, by default). It's mostly 30+ °Cs in summer, in here. Cheers 👍
Well I have never needed one, but you need the thermostatic block that goes on the side of the box
@@BritannicaRestorations thank you Mike
Hello Mike. May I ask please, how do you remove gearboxes from the vehicles ? Do you have a car liift, or a hoist ? I am wondering if, in my business, I could do it on my own as well. Garth Richert.
GarthI have tried several methods of getting the box out and all vary.I will do a video in the near future, but for now I will tell you the way I used to do it and the way I do it now.I am fortunate to have a fork lift, so I used to lift up the back and support the vehicle on 3 foot stands on the rear axle, then by removing the floor I could get access to the balance point of the gear box and with an extension on the forklift I attached a chain, swung the box back and dropped it on the floor.Now I have 2 post liftI also have a small transmission jack I bought usedSo as my lift height is limited, I set the whole car on 4 x 3 foot stands (safety first!) and used the transmission jack to lift out the gearboxOne thing to watch which will save you a ton of hassle refitting is take off the High / low shift assembly as it catches the front edge of the seat base when trying to get the tranny back in (and easy to get out too!)
I am flat out trying to get my bathroom remodelled which has been going on for a week now (hence no videos!)
If I get chance over the weekend I will do a few video notes as it is simpler to explain than type!
Mike
th-cam.com/video/NSUlENy_y5E/w-d-xo.html
Just got LT77 50A.......J suffix.
Hello, first you make very good videos about repair Land Rovers. I have a question. Where do you buy the parts for the LT 77 gearbox?
Sorry for the bad English I am German.
Best regards Gerhard
Gerhard - I use Ashcroft's as they have some kits already made
@@BritannicaRestorations Thank you for the answer
hi mike ive got a 1st and 2nd crunch how much do you charge to rebuild one thanks
Depends on what parts are needed = labour is C$550/750 depends how clean the box it - but it sounds as the synchro hub is defective $$$$!
Hey mate . I’m stuck with trying to find that collar remover .
I got mine from Dingocroft - not cheap
www.dingocroft.co.uk/acatalog/Gearbox_Tools.html
Mike
Hi. Could you explain how to strip the box without the special land rover tools. I'm sure many others like myself can't justify the expense. Cheers
I understand, but this rebuild was a request by someone who had the tools but didn't know how to use them
You could use pullers to get the collar off, and tube and screw bar to put it back on
You must never hit the collar or you could damage the bearings on the mainshaft
If I get chance over winter I will try and strip one using improvised tools, but at the moment I am extremely busy with work
Mike
@@BritannicaRestorations Thanks for that. No need to go through that bother. I just wasn't sure how it could be done.
🧐 My goodness! The tools to take one of these boxes apart cost more than a second hand box! I recently purchased an LT77 Suffix C box for £200 with a remote tail shaft for a Rover SD1 (which I intend to put in my P6).. But I have to admit, I'm starting to wonder if I will ever get it apart, as I cannot justify the cost of the tools or the cost of a rebuild! 😱
A box like a Ford T5 or the Getrag out of my brothers BMW E21 can be stripped using nothing but basic tools and a press.. Maybe there is a way a skinflint (I mean money conscious) person can strip one of these down using just a press.. 🤔
Let me know your thoughts if you ever have a moment.. I don't want to end up butchering the box as they are getting a bit rare now (especially ones out of cars) - and it feels really good for a box of its age.. Not much play in the gears or reverse, splines look untouched but it is wobbling tiny bit on the input shaft.. 🧐
I do about 10 gearboxes a year so they have paid for themselves - you can get into the box by fabricating tools
R380 next please!
Lee
It's coming up soon as I can get into my container!
Flipping doors are still iced up!
Mike
So the oil pump is driven off the main shaft and pumps all the time the prop shaft is turning?
The oil pump is driven by the layshaft - so it is always pumping when a gear is selected
@@BritannicaRestorations great video by the way, thanks. I presume the layshaft turns the whole time the engine is running even if the gearbox is in neutral?
Yes - however if the vehicle is towed and the transfer is not in neutral, then the drive will not turn the layshaft and oil pump even if the main gearbox is in neutral
@@BritannicaRestorations Sorry to be a pain but do you know if the version of the LT77 used in the Triumph TR8 has the same pump setup.
Yes - I believe it has
😃
Another great video Mike!. I love your little tips you use, there is only so much a workshop manual can tell you. These videos really help. Thanks.
Thank you for the support!
Sorry for the late reply - just found out TH-cam is not reporting a lot of comments, so I do not see them
Mike