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MG TD TF 1500 - T9 speedo drive

Does anybody have a cure for the T9 speedo drive pumping oil up the cable into the speedo.
The cable acts as an Archimedes screw inside the outer.
I have cured it on original boxes with a modified
takeoff.
Any ideas appreciated.
Ray TF2884
Ray Lee

Ray,
Replace the lip seal on the speedo drive.
Regards
Declan
Declan Burns

As Ray has mentioned, there are problems with the inner drive cable on NEW cables now being sold for the reason Ray describes. I have this problem with a new drive cable and I replaced the seal at the T9 gearbox end but this did not stop the archimedes screw effect flooding my speedo head unit. My old cable worked without this problem until the inner drive became too flexible, causing the needle to fluctuate wildly.

Solutions other than a new oil seal at the gearbox drive end would be appreciated. Drilling a drain hole in the outer casing at the gearbox end, perhaps?

Neil. TF XPEG3059 HDC16/9205
N D Wallace

I had this problem a few years back. Doug Pelton at From the Frame Up has a special conversion seal which goes at the gearbox end of the cable. I installed it and have never had the problem since.
Richard TD0460
R A B Wilson

Neil,
You could drill a hole but that only creates another problem.

https://www.type9gearbox.co.uk/store/p131/TYPE_9_GEARBOX_SPEEDO_DRIVE_GEAR_25_TEETH.html
You can see here that the lipseal sits on the metal sleeve at the square drive end of the gear. Maybe the shaft is hollow and that is where the oil is getting through. If so it could be sealed.

Regards
Declan
Declan Burns

Ray, I assume you've discussed this with Peter at Hi-Gear?
JK Mazgaj

There should be no oil around that area anyway. I doubt if it is a cable problem.
Peter had his own speedo drives commissioned as far as I know.
Certainly worth discussing it with him.

Regards
Declan
Declan Burns

JK
Not my car, it belongs to Neil. He is probably doing that.
Ray
Ray Lee

This thread was discussed between 18/06/2023 and 19/06/2023

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