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Post by miniman35 on Jan 1, 2024 21:34:06 GMT
Hi all, happy new year. I've to change the gear box on my 1980 due to damage while it was stored in long term storage years ago. Last summer I picked up a replacement gearbox which I was told was from a 1275 with about 20,000 miles on it and I'll be fitting to my 1 litre. I'm having trouble removing the gear selector cable. I've disconnected it from the selector but can't quite work out how to disconnect from the engine. I was following the hayne's manual but it doesn't seem to be correct. I've searched the forum and find any instructions. Can some one confirm how the cable is removed from the engine?
Thanks
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Post by jockduck on Jan 2, 2024 10:08:31 GMT
On the early boxes its a pin through the fork with I think a small split pin, once the pin is out you can unscrew the fork and then the outer cable nuts, never dealt with a later box but just looked up the Rover manual and it looks similar, there is a bolt through the fork to be removed then it sounds very like the early arrangement.
Jock
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Post by miniman35 on Jan 4, 2024 14:20:08 GMT
On the early boxes its a pin through the fork with I think a small split pin, once the pin is out you can unscrew the fork and then the outer cable nuts, never dealt with a later box but just looked up the Rover manual and it looks similar, there is a bolt through the fork to be removed then it sounds very like the early arrangement. Jock Thanks for the reply. I got it sorted last night. There was a piece of metal that looked to be another bracket that confused me. I discovered it was just sitting against selector. After removing the engine last night. I suspect someone tried working on car/engine before my family took ownership. We know the Mini was part converted for a disabled driver (Paddle controls) and changed back before we got it. Thanks again |
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Post by mra-minis on Jan 14, 2024 18:24:04 GMT
On the early boxes its a pin through the fork with I think a small split pin, once the pin is out you can unscrew the fork and then the outer cable nuts, never dealt with a later box but just looked up the Rover manual and it looks similar, there is a bolt through the fork to be removed then it sounds very like the early arrangement. Jock Thanks for the reply. I got it sorted last night. There was a piece of metal that looked to be another bracket that confused me. I discovered it was just sitting against selector. After removing the engine last night. I suspect someone tried working on car/engine before my family took ownership. We know the Mini was part converted for a disabled driver (Paddle controls) and changed back before we got it. Thanks again I can be contacted on sales@ap2.world Don't forget that the selector system needs to be carried across from the other engine as the differences will cause an issue with gear selection and decrease the life of the transmission. |
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Post by miniman35 on Jan 14, 2024 20:55:34 GMT
Hi Mar-Minis, thanks for the tip. I wasn't aware of that but I had planned on swapping it over anyway. The main reason for the job I'm about to do over the coming weeks is due to damage on gear box casing. While the Mini was in long term storage, it was driven over rocks and through a bog by the owners kids (I wasn't aware of this at the time). Parts of the gear box have been worn to about 1/2mm thickness and also cracks allowing oil leaks. The replacement box I have I got last summer from a guy who forgot he had it. A part from a big clean, I need to compare if the gears/setup is what I have or different. The only thing I know is the box came form a 1275 and my own in 998.
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Post by mra-minis on Jan 15, 2024 12:33:26 GMT
Hi Mar-Minis, thanks for the tip. I wasn't aware of that but I had planned on swapping it over anyway. The main reason for the job I'm about to do over the coming weeks is due to damage on gear box casing. While the Mini was in long term storage, it was driven over rocks and through a bog by the owners kids (I wasn't aware of this at the time). Parts of the gear box have been worn to about 1/2mm thickness and also cracks allowing oil leaks. The replacement box I have I got last summer from a guy who forgot he had it. A part from a big clean, I need to compare if the gears/setup is what I have or different. The only thing I know is the box came form a 1275 and my own in 998. I can be contacted on sales@ap2.world Will you be fitting just the transmission to the 998 engine ? if so then the transfer gears and transfer case may not be compatible, also you will need to reset the idler gear shims and the input gear shims, the idelr is easy with the engine off but the input gear will need this tool to set it correctly... 18G1089 tool for input gear shim resetting |
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Post by miniman35 on Jan 15, 2024 20:14:02 GMT
The plan is to fix it to the 998. What is the difference between the transfer cases? I've not separated the block from the gearbox so I've not been able to compare the 2 units. I've only so far removed the torque convertor which needs replacing. A few things came up so I'm hoping to remove the block sometime in the next 2 weeks.
Is there any other non-standard tools I might need to complete the job?
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Post by mra-minis on Jan 16, 2024 14:37:25 GMT
The plan is to fix it to the 998. What is the difference between the transfer cases? I've not separated the block from the gearbox so I've not been able to compare the 2 units. I've only so far removed the torque convertor which needs replacing. A few things came up so I'm hoping to remove the block sometime in the next 2 weeks. Is there any other non-standard tools I might need to complete the job? I can be contacted on sales@ap2.world If you are fitting the 998 engine to the "new" transmission then then the transfer gears have to match the idler bearing size and the 998 crankshaft, the 1275 gears will not work with the 998 as the front bush is smaller on a 998. so the 2 areas to check are idler bearing diameter, it will either be 3/4" or 7/8" in diameter they need to match, but you must NOT be tempted to mix the gear sets, keep them seperate for now, and the primary gear that sits on the crankshaft tail. to recap 1) Idler bears must be the same diameter 2) Primary gear must be correct for crankshaft tail 3) Gears must NOT be mixed between sets. 4) Transfer case must STAY with the transmission it came off as they are machined as a pair. 5) Selector MUST stay with the relevant transmission. 6) Idle gear must be checked and shimmed correctly to have the correct freeplay of 0.0035" to 0.006" 7) Input gear must be checked and shimmed using the special service tool 18G1089 to set the correct preload (shims may be needed) |
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Post by miniman35 on Jan 16, 2024 15:33:49 GMT
Hi Mra-Minis, the only thing I don't know is what selector was on the "new" box. My own plan was to transfer the running of my "old" box to the "new" box. It's more the transmission case I need over the contains. Of course I will replace were needed any bearings and any shims etc. I'll be putting a list of what is needed when I've taken everything apart, the engine will also be getting all new gaskets/seals and fresh paint. It seems the paint was removed from the box and head was repainted to some sort of blue colour. I was informed that blue was a Mini Sport/Spares colour if they did any performance work.
Is your shop still active? I've to get a replacement torque convertor. I've already had a price from a UK firm but I see on your website you might also do part exchange. Is it something you can do?
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Post by mra-minis on Jan 16, 2024 21:47:00 GMT
Hi Mra-Minis, the only thing I don't know is what selector was on the "new" box. My own plan was to transfer the running of my "old" box to the "new" box. It's more the transmission case I need over the contains. Of course I will replace were needed any bearings and any shims etc. I'll be putting a list of what is needed when I've taken everything apart, the engine will also be getting all new gaskets/seals and fresh paint. It seems the paint was removed from the box and head was repainted to some sort of blue colour. I was informed that blue was a Mini Sport/Spares colour if they did any performance work. Is your shop still active? I've to get a replacement torque convertor. I've already had a price from a UK firm but I see on your website you might also do part exchange. Is it something you can do? I can be contacted on sales@ap2.world If it has park then it needs the park selector and quadrant etc as they are specific. It depends on your transmission but an early 998 internals will not fit into a 1275 case and vice versa. My shop is partly active, if you want anything just create a sale you won't be able to pay but screen shot it too me and I will create an invoice, I have a lot of parts including Torque Converters in stock. |
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Post by miniman35 on Jan 16, 2024 22:19:03 GMT
I'll keep you in mind when I'm putting the shopping list together. So if the "new" transmission lines up with the block, I'll need to swap the selectors over so I can keep N,1,2,3? From the little the guy who I bought the transmission from knew, it sounds the "new" transmission came a 1990's mini meaning the selector would have "park"? Otherwise I'll need to locate transmission case from a 998 and swap the inners?
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Post by mra-minis on Jan 17, 2024 9:58:15 GMT
I'll keep you in mind when I'm putting the shopping list together. So if the "new" transmission lines up with the block, I'll need to swap the selectors over so I can keep N,1,2,3? From the little the guy who I bought the transmission from knew, it sounds the "new" transmission came a 1990's mini meaning the selector would have "park"? Otherwise I'll need to locate transmission case from a 998 and swap the inners? I can be contacted on sales@ap2.world The mating faces are identical so fitting it to the block isn't an issue (I sell a gasket set for this job) park was only fitted to 1275 and a few export 998, look at the front cover (big square cover with the oil filter housing bolted to it), if they have a large boss (with a switch screwed in it) towards the lower edge this is a "park" box and would need the PRN123D lever mechanism fitted if they are both the same but have no park inhibitor switch then fit the RN123D mixing these up will cause premature failure. |
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Post by miniman35 on Jan 17, 2024 10:48:11 GMT
Your a great source of information. I'm away with work/family and won't be home until weekend. I don't recalled seen anything fitted on the section your speaking about but I will confirm at the weekend.
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Post by miniman35 on Mar 23, 2024 22:13:50 GMT
Hi, sorry for the delay as I've been ill and travelling for work. I managed during the week to separate the gearbox from the block. The only difference I can see between the 2 gearbox cases is the hole were the idle gear bearing goes. The gearbox I got that hole is larger. After cleaning the replacement gear box, I have found some minor damage and blocked oil pipes. I also believe the millage is a lot higher on the replacement box than what I was told. There are signs of were. So I'll have to transfer everything from my old box to the new one. Is there anything else I should be aware of?
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Post by mra-minis on Mar 25, 2024 17:48:45 GMT
Hi, sorry for the delay as I've been ill and travelling for work. I managed during the week to separate the gearbox from the block. The only difference I can see between the 2 gearbox cases is the hole were the idle gear bearing goes. The gearbox I got that hole is larger. After cleaning the replacement gear box, I have found some minor damage and blocked oil pipes. I also believe the millage is a lot higher on the replacement box than what I was told. There are signs of were. So I'll have to transfer everything from my old box to the new one. Is there anything else I should be aware of? I can be contacted on sales@ap2.world That will not be as simple as it sounds, I doubt if it will be possible due to the minor and major differences within. |
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Post by miniman35 on Mar 25, 2024 20:45:44 GMT
Hi, sorry for the delay as I've been ill and travelling for work. I managed during the week to separate the gearbox from the block. The only difference I can see between the 2 gearbox cases is the hole were the idle gear bearing goes. The gearbox I got that hole is larger. After cleaning the replacement gear box, I have found some minor damage and blocked oil pipes. I also believe the millage is a lot higher on the replacement box than what I was told. There are signs of were. So I'll have to transfer everything from my old box to the new one. Is there anything else I should be aware of? I can be contacted on sales@ap2.world That will not be as simple as it sounds, I doubt if it will be possible due to the minor and major differences within. I did a bit of reading last night and a chat with someone. It seems that some "A" engines were adapted when A+ came along. I don't know if this is the correct term but something called "racer" was used as a space filler. Meaning idle gears with a smaller diameter can be fitted to gearboxes with the larger hole. I'll try track one down, the only other option I have is to get another case. |
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Post by mra-minis on Mar 25, 2024 21:17:05 GMT
I can be contacted on sales@ap2.world That will not be as simple as it sounds, I doubt if it will be possible due to the minor and major differences within. I did a bit of reading last night and a chat with someone. It seems that some "A" engines were adapted when A+ came along. I don't know if this is the correct term but something called "racer" was used as a space filler. Meaning idle gears with a smaller diameter can be fitted to gearboxes with the larger hole. I'll try track one down, the only other option I have is to get another case. I can be contacted on sales@ap2.world Yes there are bearing adapters to fit older gears in later cases, not something I use or have though. |
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Post by 6886auto on Mar 25, 2024 22:18:40 GMT
Hi, sorry for the delay as I've been ill and travelling for work. I managed during the week to separate the gearbox from the block. The only difference I can see between the 2 gearbox cases is the hole were the idle gear bearing goes. The gearbox I got that hole is larger. After cleaning the replacement gear box, I have found some minor damage and blocked oil pipes. I also believe the millage is a lot higher on the replacement box than what I was told. There are signs of were. So I'll have to transfer everything from my old box to the new one. Is there anything else I should be aware of? Don't transfer the parts. There are way too many differences to do so easily even in a couple of years difference. |
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Post by miniman35 on Apr 7, 2024 20:36:20 GMT
Just any update. I went with changing the bearing. I fitted it today and test fitted gears. All is looking good, I'm hoping to order some seals I forgot about. Hopefully I will have them by next weekend.
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