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Thread: Type 9 Gearbox in a Roadster

  1. #1 Type 9 Gearbox in a Roadster 
    club member Club Member andyf's Avatar
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    I have had the 4 speed and 5 speed type-9 gearboxes fitted to my roadster. The 4 speed box started making noises shortly after I recommissioned it and I though it was because it had stood idle for 18 years. But then the 5 speed box did exactly the same thing and started making the same noises. So I rebuilt it with new bearings and it was fine for a year but now it's started making the same noise It always starts with a "shing shing" noise off throttle in 4th then infects 3rd and 5th. I'm starting to think I have an installation problem. Could it be getting too hot as the transmission tunnel gets quite not? Or the other issue I have is that the engine mounts provided by Marlin are slightly offset so the gearbox mount is under some side load to straighten the engine and gearbox in the chassis?? Do other roadsters with type-9s have the same issue or is it just mine?
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  2. #2 Re: Type 9 Gearbox in a Roadster 
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    What type of propshaft do you have, is it the type with one doughnut and one u/J. If it is the doughnut they
    do not like to be run out line, I have a type 9 box with a u/j at each end of the prop , I had it made 20 years ago and so far it has never given any problem, just grease the u/j once in a while. Mind you the type 9 gave up the ghost at the start of the lockdown when the circlip that keeps the 5th gear in place on the mainshaft split in half, why ?, but I was able to check my hydraulic concentric slave cylinder conversion and check the clutch plate for wear, 0.3mm in 11 years but I changed it any way having got that far.
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  3. #3 Re: Type 9 Gearbox in a Roadster 
    club member Club Member andyf's Avatar
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    @Phil, Mine has a U/J at both ends. The front one is sealed and I had to replace the rear one a while ago as it had started to wear. What seams odd is that they start off fine and then after a relatively short while they start to get noisy. I do wonder if the oil is getting too hot??
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  4. #4 Re: Type 9 Gearbox in a Roadster 
    club member Club Member jon_wilkinson's Avatar
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    What oil are you using in the gear box? There was a thread on here about the newer GL-5 oils damaging older boxes.

    Edit: stevejgreen has an article about this on his Keepandshare site.
    Last edited by jon_wilkinson; 24-08-2020 at 01:27 PM.
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  5. #5 Re: Type 9 Gearbox in a Roadster 
    club member Club Member andyf's Avatar
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    Quote Originally Posted by jon_wilkinson View Post
    What oil are you using in the gear box? There was a thread on here about the newer GL-5 oils damaging older boxes.

    Edit: stevejgreen has an article about this on his Keepandshare site.
    I've used the Castrol and the Comma 75/90 Synthetic GL4 gear oil it's still lovely and clean...
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  6. #6 Re: Type 9 Gearbox in a Roadster 
    club member Club Member jon_wilkinson's Avatar
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    Quote Originally Posted by andyf View Post
    I've used the Castrol and the Comma 75/90 Synthetic GL4 gear oil it's still lovely and clean...
    Not that then.

    Like andyf I've not had the problem you're seeing but I've only had mine 4 years.

    If it was the oil getting too hot you would have thought it would affect other Ford engined Roadsters.
    Last edited by jon_wilkinson; 24-08-2020 at 03:48 PM.
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  7. #7 Re: Type 9 Gearbox in a Roadster 
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    Is the gearbox fitted to a Ford engine or something else via an adapter plate. Not sure what the effect would be if the gearbox input shaft was mis-aligned with the small bearing or bush in the flywheel/crankshaft end. I believe the input shaft will tolerate a small amount of misalignment but there must be a limit. Just a thought!
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  8. #8 Re: Type 9 Gearbox in a Roadster 
    club member Club Member andyf's Avatar
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    Quote Originally Posted by ggrum View Post
    Is the gearbox fitted to a Ford engine or something else via an adapter plate. Not sure what the effect would be if the gearbox input shaft was mis-aligned with the small bearing or bush in the flywheel/crankshaft end. I believe the input shaft will tolerate a small amount of misalignment but there must be a limit. Just a thought!
    A good point. It's mated to a Pinto so it should be ok. The bearing in the flywheel was in good condition. What I'm wondering is if it is the needle lay shaft bearing as it was the only one I did not replace and I see that BGH Geartech list a variant for the 2.0 with a roller lay shaft bearing as an upgrade.
    Mk2 SWB Marina Roadster with a 2.0L Pinto built in 1986
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  9. #9 Re: Type 9 Gearbox in a Roadster 
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    One thing to check is that the gearbox is level longitudinally and laterally. The oil should be about level with centreline of the input and output shaft. A slight lowering of this level might cause the small bearing between the two shafts to run dry and fail. Failure of this bearing causes the two shafts to run out of alignment and the gears will not mesh correctly.

    Did you, or could you, take a look at the internals of the old boxes?
    Paul
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  10. #10 Re: Type 9 Gearbox in a Roadster 
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    Andy, Obviously the propshaft is short on a Roadster but was there any vibration at a particular speed that could suggest that the propshaft may be out of balance?
    Provided you replaced the uj joint with like for like joint it is unlikely to need rebalancing , however I have seen balance weights fall off the propshaft , so inspect that carefully.
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