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2 weeks ago i bought from a autosales a mini one 2004 (january vin 160 000km ) , i tested good all the front gears, 1,2,3,4,5 and they works perfect and well, fast changement, no problem on syncros, no bearings noise.......
so...when i engage the reverse gear the car slap, the gear engage well, so i hear from the gear box a CLA CLA CLA CLA like a woodpecker bird in my gearbox, and when i increase the speed, the noise increase the speed , more fast, and a cltuch bad smell....
this JUST with reverse box, i tested the first 1th gear, and i dont hear any splap or claclacla sound, just the reverse....
i bring my car to who sell me the car, its a mechanic, he want to pull down the gearbox the next week , to find the problem.
He talks as who knows these gearbox units (midlands ) so i havent full trust in him,
parts or rover parts...sooo....who knows........
.
well,anyone can help me to undertnd waths the the problem on gearbox and if u ve to sell the parts to fix the gearbox (reverse gear?) ,
used unit here are expensve more than new (crazy italian marked full of after crisis bloodsuckers)
so i can found very cheap rover r65u and pegeout MA gearbox unit, i can use the parts inside those units to rebuild my gearbox?
Thanks for the first replies...
so theres no any sincro in reverse.
the gearbox dont have any problems in gear connection. every gear come well with no sound. just the reverse sound crazy
Im not sure about the 5 speed but the Getrag 6 does have a reverse synchro. Try putting it into reverse with the engine off and no clutch. If it goes in reverse then it may be a clutch problem. If it won’t go into reverse with engine off and no clutch then it may be shift linkage problem. The bad smell could be a clutch issue. Also the 5 speed midland has a history of problems including a class action law suit that was won against BMW.
Please substantiate your assertion that the Getrag 6 reverse has synchro. I want to know for academic interest rather than daily needs. Synchro would only encourage those clueless from trying to put it into wrong gear (i.e. opposite to the vehicle direction of travel). While the forward gears are helical, the reverse are nearly always straight cut and are not constantly engaged (rotating).
Here you go. https://www.ebay.com.au/p/BMW-Mini-G...Ring/860980111 https://picclick.co.uk/BMW-Mini-6-Sp...541345411.html
Ive learned from my own experience to never assume. I researched this issue before answering. I also read several blogs that state that reverse is synchroed in the 6 speed. In fact some manual transmissions are and some are not. Older transmissions often are not and required a double clutch technique to prevent grinding. I have driven vehicles that required double clutching for every gear so I know what I’m saying.
Right. Good try in grabbing for a handful of sand when you are down. That is crap proof, and one reason I rarely buy from feaBay. It does so as a clickbait that is bait and switch taking advantage of google search that is purchase-bias. You can search for all those unobtainums and you will always get a feaBay hit. Only that clicking the link to see this same crap "list" that is currently sold out. Let me tell you, it has never available either for the price, supply, or that it is so rarified so let us recommend to you these other consigned items instead.
You stated that you , “doubt” that reverse has a synchro. Obviously you aren’t sure so why don’t you prove that there isn’t a synchro? Why do you assume that I was, “down?” I wasn’t trying to prove myself correct merely doing my best to answer your question that you yourself didn’t know the answer to. Why don’t you research it and come back and give us the definitive answer so we will all know. Quite frankly I don’t care who is right. As I stated I read several blogs that stated the 6 speed Getrag does have a synchro. Putting a transmission in reverse in a Mini is not that easy as it requires a deliberate push to the left from neutral requiring significant force to do so. That would be the safety feature that would prevent, “those clueless,” as YOU put it from putting it in reverse.
Not picking a fight here, but if you are going to accuse me of trying to defend a position just to be right, I’m going to defend myself. Maybe someone else, with actual experience with these transmissions, will contribute and give us the correct answer.
I’m still searching; are you? Here is an article about the Getrag 5 speed that states it has a fully synchronized reverse. https://en.m.wikipedia.org/wiki/Getrag_F23_transmission
So, we know that some transmissions are synchroed in reverse.
The function of a synchromesh ring - which is made of bronze for it high frictional characteristic against the harder harden steel gear ring it to spin up the output shaft that is not at the same speed. This is what you want for forward gears as most often the gear change takes place when the vehicle is in motion. Not so with reverse and you want to prevent the catastrophe of shifting into reverse while the car is coasting forward. Rather than facilitate two gears engaging, you want to discourage. If there is a synchro ring for the reverse gear, it must have to do with the peculiar packaging of a gearbox for FWD which necessitates two lay shafts rather than one.
Most unfortunately the Getrag 6 speed is not serviceable per Getrag so credible documentation or even teardown photos are difficult to find - thanks too to its reliability that few ever need servicing.
For relevance the OP asked about the Midland 5-speed box.
There are 1st/2nd synchro, 3rd/4th synchro, and 5th gear synchro assemblies,
but no reverse synchro listed.
It does put a reverse idler gear into play to select reverse and may use the
1st gear as the reverse gear in combination with that, so this may give it
synchro function in reverse, if I understand correctly.
Maybe someone with more experience than I have can interpret it more accurately.
In any case it doesn't sound like a synchro problem anyway.
The function of a synchromesh ring - which is made of bronze for it high frictional characteristic against the harder harden steel gear ring it to spin up the output shaft that is not at the same speed. This is what you want for forward gears as most often the gear change takes place when the vehicle is in motion. Not so with reverse and you want to prevent the catastrophe of shifting into reverse while the car is coasting forward. Rather than facilitate two gears engaging, you want to discourage. If there is a synchro ring for the reverse gear, it must have to do with the peculiar packaging of a gearbox for FWD which necessitates two lay shafts rather than one.
Most unfortunately the Getrag 6 speed is not serviceable per Getrag so credible documentation or even teardown photos are difficult to find - thanks too to its reliability that few ever need servicing.
For relevance the OP asked about the Midland 5-speed box.
Not trying to cloud the issue here, but are you saying that no manual transmission has a reverse synchro? My research has uncovered that there are transmissions that have a reverse synchro. I did contribute that the OP should check the shift linkage and how to test if it is the linkage it possibly the clutch.
cazzo :D my question and topic about my reverse probleme become a fight about syncro....... im not an enginner, so i worked with cars for years, and i never see or never talk about a gearbox with syncro on reverse :D
About my problem someone suggest just the linkage?
2 weeks ago i bought from a autosales a mini one 2004 (january vin 160 000km ) , i tested good all the front gears, 1,2,3,4,5 and they works perfect and well, fast changement, no problem on syncros, no bearings noise.......
so...when i engage the reverse gear the car slap, the gear engage well, so i hear from the gear box a CLA CLA CLA CLA like a woodpecker bird in my gearbox, and when i increase the speed, the noise increase the speed , more fast, and a cltuch bad smell....
this JUST with reverse box, i tested the first 1th gear, and i dont hear any splap or claclacla sound, just the reverse....
i bring my car to who sell me the car, its a mechanic, he want to pull down the gearbox the next week , to find the problem.
He talks as who knows these gearbox units (midlands ) so i havent full trust in him,
parts or rover parts...sooo....who knows........
.
well,anyone can help me to undertnd waths the the problem on gearbox and if u ve to sell the parts to fix the gearbox (reverse gear?) ,
used unit here are expensve more than new (crazy italian marked full of after crisis bloodsuckers)
so i can found very cheap rover r65u and pegeout MA gearbox unit, i can use the parts inside those units to rebuild my gearbox?
thanks
I rescind my remark that it could be a gear shift linkage problem as I didn't read carefully. Reverse gears should last longer than the lower forward gears so the cause of you problem may be more obscure, given that there is bad clutch smell. A failing clutch can manifest strange symptoms including noise. Evidently you have the car not long so you have little knowledge that makes it more difficult to diagnose the problem.
There is the possibility the cause can be the drive axle(s). When the CV joint is worn it can also exhibit obscure symptoms but seems OK at speed.
I have seen rebuilding kit on eBay for the R50 Midland box. Most of the vendors are in UK. I would not buy any parts until I tear into the gearbox and find evidence of the cause.
I rescind my remark that it could be a gear shift linkage problem as I didn't read carefully. Reverse gears should last longer than the lower forward gears so the cause of you problem may be more obscure, given that there is bad clutch smell. A failing clutch can manifest strange symptoms including noise. Evidently you have the car not long so you have little knowledge that makes it more difficult to diagnose the problem.
There is the possibility the cause can be the drive axle(s). When the CV joint is worn it can also exhibit obscure symptoms but seems OK at speed.
I have seen rebuilding kit on eBay for the R50 Midland box. Most of the vendors are in UK. I would not buy any parts until I tear into the gearbox and find evidence of the cause.
thanks u right
about the drive axles and joint are checked and tested and one is brand new. about the bad smell is jus when I use the reverse gear ., with the front gears the car run perfect.....
it's an obscure problem right... I hope to can open the gearbox this week and I hope to can get some pics too! I suspect a broken gear or some broken tooth especially in the reverse gear tooth.
about the sellers on the bay some sell just bearings , I hope to get parts from an UK store and u re again right when u said only when I inspect the gearbox inside and find the problem
I will just trjust ask to you or some other members if someone know if I can use Peugeot ma boxes or rover r65 boxes to get parts for my Midland... this is south Europe and Peugeot are common here
From this exchange it seems you have reasonable knowledge of manual gearbox. It seems that your are up to something to suspect there are broken bits in the transmission that binds when in reverse, which may explain for the fouled clutch friction material smell. If it were me before removing the gearbox for inspection I would try the following (which needs to be carried out carefully as it involves some risks in the wrong hands):
Lift one front wheel off the ground and support the suspension of that side safely with a jack stand. Apply the parking brake firmly to lock the rear wheels.
Leave the other front wheel on the ground, and this allow you to spin the gearbox gears without the differential getting in the way.
Leave the gear in neutral and engine off. Hand rotate the free front wheel to see if you can feel abnormal resistance cause by the broken bits in the transmission.
Put the gear in reverse and engine off. Depress the clutch pedal and hand rotate the free front wheel to see if you can feel abnormal resistance cause by the broken bits in the transmission.
If all seem well so far the next step will require extreme care.
Place the gear in reverse and depress the clutch. Start the engine and carefully and slowly release the clutch. The engine will drive the free wheel to rotate in reverse. Pay attention for abnormal noise which can suggest some broken pieces in the gearbox. DO NOT apply the brake while the free front wheel is turning as this can launch the car backwards.
I have no idea if Peugeot gearbox is compatible with the R50 Mini. You might have better luck with European Neon as it also has the Tritec engine that our Minis use. Still there are a lot of risks unless you can access one to check without buying it. The interface to the drive shafts may very well be different.
Just a thought. There are few members here have failed Midland box. May be you can get one to sell you the gear from their box. It depends on how much work for them to get the part for you.
thanks. I need 2nd gear and syncro and reverse gear. i just wrote to John tee. I'm sure according to some old post that I can find used parts innavrover r65 or a Peugeot ma box. so I need the help of god
the car slap, the gear engage well, so i hear from the gear box a CLA CLA CLA CLA like a woodpecker bird in my gearbox, and when i increase the speed, the noise increase the speed , more fast, and a cltuch bad smell....
