Rebuilding My Triumph Spitfire Gearbox 3 - Reassembly

Подписаться 5 тыс.

Просмотров 10 тыс.

50% 1

The long awaited reassembly process begins! Watch as we put the gearbox bits back where they belong in this Triumph Spitfire transmission. Incidentally, the procedure is very similar to other Triumph gearboxes such as a TR gearbox (though the components and torque specs will vary). As always, please don't hesitate to post questions... and subscribe to the channel to see more videos as they come out!

Авто/Мото

Опубликовано:

16 окт 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 68

@cherrypicker8897 3 месяца назад

Just completed the rebuild today, excellent video very helpful. Thanks.

@midwestmotoring 2 месяца назад

Glad to be of service! Hopefully the car is back on the road now

@Chrisozzz78 7 месяцев назад

So glad I found your videos, just tackling my Dad's Spitfire Engine & Gearbox. The gearbox rebuild series is really good. Thanks for posting these great videos!! They are going to be so useful.

@midwestmotoring 7 месяцев назад

Thanks! I'm happy to help. It's a fairly straightforward job, but if you think you might need tech support during or after, consider being a Midwest Motoring member. Enjoy that car!

@Chrisozzz78 7 месяцев назад

@@midwestmotoringThanks I will certainly consider it. Looking forward to getting behind the wheel!!

@billwelter4101 6 месяцев назад

Great video! Thanks! I just bought the same press from H.F. !

@midwestmotoring 6 месяцев назад

It's not the best ever, but it's never let me down. Great purchase

@peterwalker6446 6 месяцев назад

I reassembled my gearbox today and I have found a slightly different method of installing the mainshaft bearing without having to switch between pressing the casing and shaft multiple times: I assembled the mainshaft including the front synchro hub and used some string to tie the whole assembly together so it wouldn't fall apart. I engaged 3rd gear on the assembly as this would bring the front hub outer ring rearwards enough to clear the large gear on the dropped down layshaft and allow the still loose mainshaft to be brought further forward in the casing. This allows the bearing outer race to be easily pressed into the casing all the way to its retaining ring in one go due to the mainshaft being so far forward that it does not engage with the inner race (I found it easier to tap the outer race in using a hammer and brass drift). Then it's just a simple matter of using the hydraulic press to press home the mainshaft rearwards into the bearing inner race, again all in one go! Be sure to remove the string just before the 1st gear thrust washer contacts the inner race otherwise it'll get trapped! Hopefully that made sense, I found it a much simpler method of getting the same result with the rear bearing :)

@midwestmotoring 6 месяцев назад

Definitely a good tip! I've done quite a few more since the video, and using string to hold things together works well

@hugoschyns6937 3 года назад

Great video! This one together with the other two will be very useful for rebuilding my GT6 gearbox next week!

@midwestmotoring 3 года назад

Great to hear! Let us know how the rebuild goes.

@hugoschyns6937 3 года назад

@@midwestmotoring dismantling went well, the most difficult part was to get the speedometer gear out of the mainshaft. I’m now waiting for a new 1/2 synchro hub and the gearbox to be painted before assembling :-)

@midwestmotoring 3 года назад

@@hugoschyns6937 the trick for the speedometer gear is usually a wrench slightly larger than the mainshaft. You can put the open end around the speedo gear and then tap on the wrench with a hammer. (don't forget to remove the circlip!) Sounds like you got it though. Good luck with the build!

@davidbosworth.3395 Год назад

Great video, thanks

@midwestmotoring Год назад

Glad you liked it!

@edwardkendall3905 3 года назад

Great practical detail.

@midwestmotoring 3 года назад

Glad it was helpful!

@cratecruncher6687 2 года назад

Excellent video. I learned a lot! Although I would do one thing different. When you pressed the input shaft bearing into the front of the case 24:10 you applied force on the end of the shaft loading the race. I was always told you should only press a bearing into it's housing by the outer race. So a piece of pipe matching the diameter of the outer race would have been my choice.

@midwestmotoring Год назад

Good call!

@gryfandjane 3 года назад

Excellent again. Would you normally use assembly lube here?

@midwestmotoring 3 года назад

Not really necessary. The gearbox doesn't depend on a pressurized oil system like the engine, and it's also not moving very quickly when you're backing out of the garage, so the gear oil has plenty of time to lubricate everything on startup. Good question though!

@davidbosworth.3395 Год назад

I noticed that you never put the spacer on the inside of the input shaft after the cage bearing, or was it still in place inside the input shaft?

@midwestmotoring Год назад

I haven't rewatched to be sure, but if memory serves not all gearboxes have a spacer. I could be wrong.

@dbarr15 3 года назад

Thanks, great video.

@midwestmotoring 3 года назад

Glad you liked it!

@rayjohnson1778 2 года назад

Excellent video, next question how much would you charge me to rebuild mine. Starting to make noise and won't stay in reverse. I can ship it to you

@midwestmotoring 2 года назад

Hi Ray--sorry I didn't see your message until now. It depends on what type of gearbox you have, as well as whether it's overdrive or not. Typically it's some amount of labor plus parts, so I also won't have a complete idea until it's already partially disassembled--but I can usually estimate pretty close. Shoot me a message at matt@mwmotoring.com and let's chat further. Thanks!

@ozwud9085 3 года назад

Thanks, very timely as I'm doing the same. Where did you get the thicker thrust washer between the 2nd and 3rd gear bushings? The usual vendors either list them as NLA or out of stock.

@midwestmotoring 3 года назад

I don't remember for sure but I think I may have ordered it from Spitbits.

@ozwud9085 3 года назад

@@midwestmotoring Thanks, I'll check with Nigel.

@denislafrance2116 Год назад

Great video! Rebuilt my MG Midget 1500 with it. Thanks a bunch! Quick question though, what type of oil do you use to refill it? My manual says H.D. 90, which I cannot seem to find any direct equivalent. The forums say all sort of stuff but since you are a master in the subject, I guess you know the answer. (Sorry for my english, it is not my first language).

@midwestmotoring Год назад

No problem. HD 90 is just gear oil. The tricky part isn't finding 90 weight oil, but finding GL4 rated gear oil instead of GL5, which will cause damage to gearbox synchro rings. I recommend Redline MT90. You can get it from Redline directly or even from Amazon. I use this in all of my classic gearboxes.

@denislafrance2116 Год назад

@@midwestmotoring Perfect! Thanks again

@doug8715 Год назад

Are you a mechanic by trade? How did you learn so much about these vehicles? How long have you been working on these types of vehicles? I have watched all your videos and all are fantastic!

@midwestmotoring Год назад

I was for a few years to pay for college, but that was decades ago. I'm a financial planner these days, but rebuild some components for people on the weekends for my "garage budget". I've been working on Triumph, MGs, and Healeys mainly for over 20 years. I just enjoy it. :)

@doug8715 Год назад

@@midwestmotoring that is awesome! If you every need a topic for a new video, I would love to see an alternator conversion completed. I have a 1966 Triumph Spitfire MK2 and I am going to convert mine from the generator to alternator. Even with all the forums and directions I read, I still do not understand it completely. I have been working on my car for about 4 years now and I learn much better if I see someone do it while they explaining it. That is why I love all of your videos!

@midwestmotoring Год назад

That'd be a good video. I've done it already on my cars, but could probably take someone through the process. I'll add it to the list, along with how to read a wiring diagram. It's easy, but I think it scares people who haven't looked at one.

@doug8715 Год назад

@@midwestmotoring that would be great if you could do that! I've talked to people on triumph forums and they have all told me it is not difficult. However, if you do not know what you are doing, it seems very daunting. Just like when we learn to tie our shoes, it is not hard, but if you do not know how, it can be difficult until you are showed and know how it works. Thank you and your videos are greatly appreciated by newbies like myself!

@lazyfishsushibistro9386 5 месяцев назад

I just brought splitfire Mk3 1970 but when I change to 3rd gear. I can not change to 3rd gear. It made a grinding noise like it is keep turning and dont stop . need to hear any opinion. can not shaft to 3rd gear. thanks for all comment.

@midwestmotoring 5 месяцев назад

If I were rebuilding it, I could find out, but it's difficult without looking. Start by checking the top cover. Your shift linkage may be sloppy. The shift fork could also be worn especially if the gearbox has been running the wrong fluid. Make sure the clutch hydraulics are working properly and to their fullest, though if that was an issue you might be having trouble with more than 1 gear. Everything else is gearbox out, I'm afraid. The clutch might not be getting its full travel (a worn pin will cause this), the synchro ring may not be gripping properly, or you could have slop in the gear train with too much end float. You'll need to pull the gearbox to measure everything and see what needs to be replaced. If you're near Chicago I can help, and I can repair the gearbox as well if that's the problem.

@darkhart1275 Год назад

posable causes for a 1980 Spitfire mk4 1500 (with over drive) issues going between 2nd and 3rd gear.

@midwestmotoring Год назад

It's going to be either the clutch or the synchro ring. If clutch, could be hydraulic. If it's the synchro, I'm afraid that's gearbox out.

@jerbull88 3 года назад

I followed your video for the rebuild of my 73 trans. However, when I attempt to press in my input shaft I get binding between the synchro and the selector. All of my clips are able to go in place so I'm sort of stumped as to why I'm having this issue. Do you have any ideas what I might be getting wrong?

@midwestmotoring 3 года назад

The synchro ring has 3 extrusions that fit into slots cut out of the hub. Most likely the slots aren't lining up, and if you twist the synchro ring it'll fit right in. If you've tried to assemble things, the synchro ring might also be pressed tightly against the input shaft--so it'll be stuck on. That's normal, and you might have to gently pry it off with a small screwdriver or a plastic stick of some kind. It should then rotate freely. I hope that helps!

@jeremybullington847 3 года назад

@@midwestmotoring turns out my synchro hub/selector was installed in the wrong direction. i assumed if i turned it the same way you did i would be fine, but apparently the inner portion had been flipped at some point. Thanks so much for all of your videos. They are a godsend.

@midwestmotoring 3 года назад

I knew it had to be something simple! Glad you managed it! Don't forget to test the gearbox before reinstalling it. I built a test stand for a video but you can do the same with a big drill.

@michaelfricke9047 3 года назад

I had the same issue with the same cause - I had thought it could only assembly in the correct direction!

@puddingdogs106 3 года назад

All the parts for this gearbox are available fron SC Parts Group Ltd. All the shims & all he parts that are listed as "no longer avialable". But they are expensive!

@midwestmotoring 3 года назад

You can still find everything you need, even if you have to make it. I wonder if there's documentation that lists the specifications for the shims, for example. Type of steel and so forth. I'm sure someone with a lathe can cut shims and thrust washers given the correct material. I'll keep my eye on SC Parts for things I need though--thanks for the tip!

@pavelvavrina254 3 года назад

Hello, when mounting the 1 + 2 and 3 + 4 shafts, there is a small roller bearing between them and there should be a washer on each side. Your video does not show that you have placed it there. I put together the same thing three times. gearbox, but it still rubs 3 synchronous rings, I don't know how to place the washers under the bearing. I'm sorry, I don't know much English ..

@midwestmotoring 3 года назад

Hi Pavel! Your gearbox may be different, since it could be from an earlier or later car. Do you know the gearbox number on the case?

@pavelvavrina254 3 года назад

@@midwestmotoring I forgot to take a picture of the gearbox number, can you guess from the photos what it's like? I'll have the number in two days when I'm in the workshop. vavrinapavel73.rajce.idnes.cz/Repas_prevodovek_Spitfire/

@midwestmotoring 3 года назад

@@pavelvavrina254 you have a later "single rail" gearbox. It should be very similar inside but will have a different shifting system. I think what you mean is the layshaft. It's the piece with all the gears that goes at the bottom of the gearbox. There are needle rollers inside and a thrust washer at both ends. Is that the part you mean? If yes, then you might not have seen the other videos. There are 3 parts to the gearbox rebuilding and 5 videos for the overdrive. Does this help?

@pavelvavrina254 3 года назад

@@midwestmotoring Hi, thank you for the answer, so I was in the workshop today and the gearbox number is FR 25265. The previous pictures come from another gearbox that I previously refurbished. This link shows where my problem is vavrinapavel73.rajce.idnes.cz/Prevodovka/. I don't know exactly how to place these washers. I tried different variants, but the gearbox always stuck ...

@midwestmotoring 3 года назад

Ah, now I know what you mean. I think that not all versions of the bearing use those washers. That might explain why it won't fit (and why my gearbox didn't have them--it had been rebuilt before).

@engtech10 2 месяца назад

11 minutes in on this video you got to 1st gear endfloat thrust washer. Well that thrust should be tested on both sides to achieve your best results. I found .017" on oneside and .007" on the other due to a inside corner radius. Thanks again for your internet pubs.

@midwestmotoring 2 месяца назад

That's a good tip! More measurements are always a good thing. You might find one that doesn't make sense, and it could cause you to look for the reason and maybe catch a problem before it becomes serious. Thanks for the comment!

@alinalin-op7lz Год назад

where are you from mate

@midwestmotoring Год назад

Near Chicago.

@steveporritt1550 3 года назад

You should be pressing in your bearing on the outer race. By pressing on the shaft, you are pressing the balls between the inner and outer races. Ball bearings aren’t designed to take an axial load (taper roller bearings are). Other than that I thought it was quite a good video but since people will assume you are an expert, you should demonstrate it properly. I suspect you will get away with it, since the bearing is large and the balls and races are hardened steel.

@midwestmotoring 3 года назад

Hi Steve, yes that definitely makes sense now that you mention it. I assume you're referring to one of the final steps where I press the input shaft into the gearbox. Going forward, do you think a section of PVC pipe on the outer race would take the force? So long as the surfaces aren't damaged, I would imagine it doesn't take excessive force to press in the bearing. I can use that and put a bar across the top, pressing on the PVC pipe to spread the force out evenly on the outer race as you suggested. Otherwise, the input shaft would be in the way and I'd be pressing in the bearing unevenly--at least without finding some fairly heavy duty accessories for the shop press. Alternatively, I could use a brass drift and tap in the bearing, but that introduces a lot of variables that could cause damage.

@edwardkendall3905 3 года назад

Agree with Steve, I use steel pipe ( called black pipe here) usually available in a close enough diameter. The one time I tried abs it barely made it and was visibly deformed after a single operation. But your video is great, with nice detail on how to deal with not having three hands!

@midwestmotoring 3 года назад

Thanks guys! You're never too good to stop learning, so I appreciate the feedback.

@alecjefferson6993 5 месяцев назад

🥱🥱

@midwestmotoring 5 месяцев назад

I mean, there are more fun things to do with my time, but the car drives great now!

@alecjefferson6993 4 месяца назад

I worked at Standard Triumph from 1962 till the end 🥲 you made it look over complicated. them gears boxes were very strong. It was only the needle roller bearing between 4th gear and the main shaft when worn was noisy it was fitted to all the small car range etc You made it look harder than it was. That’s why I commented. Alec

@midwestmotoring 4 месяца назад

That's fair, and you're absolutely right. I just didn't want to go through the hassle of pulling a gearbox without being more thorough--even if finding anything else is unlikely. Thank you!