| Author | Message | ||
     Patrick Francis Prolific User Username: jackpot Post Number: 198 Registered: 11-2016 |
Hi Guys I have just installed a 4 speed Moss gearbox with overdrive in my Jag Mk2. I find that the overdrive switch effects a smooth change when engaging, but a slightly abrupt change when disengaging. To satisfy my mechanical sympathy, I have been using the clutch to help engage and disengage. Since I have never driven and overdrive vehicle before, I was wondering if it is normal to use the clutch with the overdrive, or if they were designed to work without? Thanks Patrick | ||
| Mark Luft Prolific User Username: bentleyman1993 Post Number: 133 Registered: 10-2016 |
Patrick, on my MKII overdrive went in and out by flipping the switch and letting up on the gas. Wasn't a Moss box though. I will say that when the overdrive is set up right, that was the sweetest setup I've ever had. I mounted the OD toggle switch on the gear shift, like a splitter in a large truck. OD on top two gears. | ||
| Jonas TRACHSEL Prolific User Username: jonas_trachsel Post Number: 149 Registered: 2-2005 |
Patrick I once had a Volvo Amazon with OD. Yes, you can shift the OD without using the clutch, but I think it hurts the OD in the long run. At least lift your right foot while switching on/off. I also have had a Laycock OD retrofitted to my 20/25 HP. I always use the clutch when engaging or disengaging. I hate the jerk it gives without de-clutching, and that is not befitting a R-R. | ||
| Robert Noel Reddington Grand Master Username: bob_uk Post Number: 1570 Registered: 5-2015 |
An overdrive such as described works like an automatic gear box and can be changed under power. But its good practice to lift off whilst changing in and out of overdrive. | ||
| Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 1609 Registered: 9-2004 |
Many years ago I ran a Jaguar with a four speed box I soon fitted a moss overdrive box and wired it up with the O/D working on 3rd and 4th. had to wire up a cut out so it would not engage in reverse, it transformed the car for MPG and lower revs. | ||
| Patrick Francis Prolific User Username: jackpot Post Number: 201 Registered: 11-2016 |
Thanks guys. Patrick, you are right. Mine was an auto, she is now a different car altogether! |
