Felix Posted September 9, 2016 Report Share Posted September 9, 2016 During a long run the J type overdrive was becoming slower to engage taking a good few seconds. After an overnight rest the overdrive engaged once more before stopping altogether. The oil level was checked but still no change. Did not have facilities to check anything else while completing north coast 500. Any areas I should check first would be appreciated. Craig Quote Link to post Share on other sites
RogerH Posted September 9, 2016 Report Share Posted September 9, 2016 Hi Craig, there is an alignment jigging hole on the righthand side of the OD. When engaged the holes should align. The solenoid pull in stop (lefthand side) may be slackening off and going out of adjustment. Filter clogging up. Drain, remove, clean. Can you hear the solenoid and relay clicking in? What GB oil do you use.? GB40 works well but may leak more GB90 works but may leak less 20/50 Engine oil works but may froth depending on type/make and aerate the oil - this will cause a sluggish/no response Roger Quote Link to post Share on other sites
peejay4A Posted September 9, 2016 Report Share Posted September 9, 2016 Not on the J type Roger. Quote Link to post Share on other sites
astontr6 Posted September 9, 2016 Report Share Posted September 9, 2016 Hi Felix! Check electrics first? I have had at least 4 s/column switches in 43 years on my J type and bullet connector(s) under centre of dashboard above G/B tunnel, as they can pull out. Lastly ,as Roger says, check solenoid operation. I have never had a problem with the interrupter switches Bruce.. Quote Link to post Share on other sites
Guest ntc Posted September 9, 2016 Report Share Posted September 9, 2016 Hi Craig, there is an alignment jigging hole on the righthand side of the OD. When engaged the holes should align. The solenoid pull in stop (lefthand side) may be slackening off and going out of adjustment. Filter clogging up. Drain, remove, clean. Can you hear the solenoid and relay clicking in? What GB oil do you use.? GB40 works well but may leak more GB90 works but may leak less 20/50 Engine oil works but may froth depending on type/make and aerate the oil - this will cause a sluggish/no response Roger Quote Link to post Share on other sites
RogerH Posted September 9, 2016 Report Share Posted September 9, 2016 Quote Link to post Share on other sites
Felix Posted September 9, 2016 Author Report Share Posted September 9, 2016 I use GB40 oil and it has only recently been replaced. I have just tried the solenoid by putting in 3rd gear and ignition on. I can hear a click going on and off when stalk put on & off. Under car to check filter next???. Craig Quote Link to post Share on other sites
RogerH Posted September 9, 2016 Report Share Posted September 9, 2016 Hi Pete, fiddle sticks - I keep being caught out by the A & J differences. Roger Quote Link to post Share on other sites
Peter Cobbold Posted September 9, 2016 Report Share Posted September 9, 2016 I use GB40 oil and it has only recently been replaced. I have just tried the solenoid by putting in 3rd gear and ignition on. I can hear a click going on and off when stalk put on & off. Under car to check filter next???. Craig Craig, If you're short of time I once used a ali coat hanger to fashion a hook that could be tugged by the driver to assist the solenoid's action to engage the o/d. It switched out of o/d as normal. Peter Quote Link to post Share on other sites
peejay4A Posted September 9, 2016 Report Share Posted September 9, 2016 Not on a J type Peter. Quote Link to post Share on other sites
Peter Cobbold Posted September 9, 2016 Report Share Posted September 9, 2016 Not on a J type Peter. Thanks Peter, my mistake. I must have used that trick when I had the A-type o/d fitted temporarily. Long time ago... Peter Quote Link to post Share on other sites
alec Posted September 10, 2016 Report Share Posted September 10, 2016 Hi I had a similar problem with my 1974 TR6 the overdrive would drop out then re- engage again after a few seconds. The spade connector onto the solenoid was loose / corroded. 42 years old. New spade terminals & new earth lead fixed the problem. So check there first. Alec Quote Link to post Share on other sites
TriumphV8 Posted November 21, 2016 Report Share Posted November 21, 2016 (edited) The bad news is that the pressurized oil gets lost somewhere on its way to the pressure pistons. The good news is that you get access to many more items from the outside than former at the A-Type. It can be the solenoid that best is swapped to a good working one for a test. Mostly this is not the problem. Next is the bottom plate to be removed. In the middle is the pump bottom that should be inspected for the ball and the spring and the ball seat. On one side is the filter that should be removed and cleaned. On the other side is the pressure valve that was the culprit in many cases when I had to repair an item. Unfortunately the fitted rubber rings are from wrong size and do not fit properly just from the beginning and get worse over the time. Needs some experience which rubber ring is able to do the job properly. Do not fit the new rings just because they had been delivered in the right box. They will be sometimes too small. Edited November 22, 2016 by TriumphV8 Quote Link to post Share on other sites
Felix Posted November 22, 2016 Author Report Share Posted November 22, 2016 Cheers to all who replied, The problem turned out to be a simple spade in the engine bay that did not even look corroded. Removal and replacement of the spades was enough to make it operate again as it should. Craig Quote Link to post Share on other sites
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