It is possible that the extra load of the speedo is causing slippage. This could be because the square in the speedo is worn (possible), the square in the drive gear is worn 9possible, but unlikely), one or both ends of the inner cable are not properly squared (possible, but unlikely), the inner cable is too short (possible, perhaps likely) or the drive gear on the output shaft is slipping because the nut on the output shaft is loose (likely).
Hope this helps.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
Found the issue.
Inside the speedo itself, the spring tension holding the plate/needle back onto zero was too much. This was probably from me fixing it up a bit earlier on. I held the needle on zero and moving the plate back and forth a few times to adjusted the spring tension while I drove up the driveway until 15mph on my phone matched the speedo. Far from being a proper calibration but still it shows it all works now.
2003 D2a TD5 Auto
1960 Series 2 Petrol
If you spring down the stop, and allow the needle to swing back towards zero, there is a tiny dot on the face that shows the correct position for the needle. Spring the stop down again, and move the needle past it and allow the stop back up.
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
So finally doing what in theory should be the second to last job. Rebuilding the swivel hubs. Disassembled one of them last night. Opened the kit to find in a serious derp moment of mine I didn't think the kit wouldn't come with the hub or axle seals. So they have been ordered. The uni joint on the axle feels good thank god. Hopefully, the other side is the same.
I would like to know though from others experiences. Is it better to rebuild it all on the car, attach the ball/seals first then putting it all together, or is it better to rebuild it on the workbench then bolt the whole thing onto the car?
IMG_20181101_190420.jpg
2003 D2a TD5 Auto
1960 Series 2 Petrol
It is (a lot) easier to build it all on the workbench and then fit it - BUT - the completed assembly is awfully heavy and awkward to handle. Really need a second set of hands to lift it into place and guide the axle in.
I have always done it 'on the vehicle' for this reason. Another reason is that if you do it this way, you can avoid bleeding the brakes by just lifting the backing plate complete out of the way and hanging it on a bit of fencing wire out of the way (make sure no strain on the hose). Of course, if doing the brakes at the same time, this is irrelevant.
Another possible advantage, although not a significant one, is that you can put the wheel on and give it a spin to make sure the bearings are properly seated.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
All done! Filled with ep90 so if there are any leaks should know soon enough.
2003 D2a TD5 Auto
1960 Series 2 Petrol
Don't forget to bend your lock tabs over, when you're ready of course![]()
Are the bolts that hold the swivel hub onto the axle tube correct ?
Difficult to tell in the photo but they look like a coarse thread. Should be a fine thread HT bolt with locknut.
I've had some where odd bolts are fitted but because of the stresses involved best to use the correct bolt so I've always swapped them out.
Colin
'56 Series 1 with homemade welder
'65 Series IIa Dormobile
'70 SIIa GS
'76 SIII 88" (Isuzu C240)
'81 SIII FFR
'95 Defender Tanami
Motorcycles :-
Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C, Suzuki SV650
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