Auto gearbox problem? - Page 7

Shuriken_57 · 17th August 2021, 19:20

Hello, I will now try to repair my gearbox.

I always get jerks when I change gears, especially 1-2 and 2-3.
I also get jerks when I’m braking.
I drained the gearbox several times and the level is good.

I tested the solenoids and they are all good.

xsport · 17th August 2021, 20:02

can you get her on t4 to see if you have any autobox stored codes ? i keep going back to my post that suggested a problem with the t.p.s . in my case it was unplugged. do you have e.p displayed on the ipk ? mine did not even when the t.p.s was disconnected. your description of jerking and clunk whilst the box goes up or down is exactly the same as mine did. quite forcefull too. worth checking before you strip the box down ... that will be some experience im sure !! (not to mention the cost and obtaining parts) have a look at t4 first if you can . all the best.

Shuriken_57 · 17th August 2021, 20:13

Quote:

Originally Posted by xsport

can you get her on t4 to see if you have any autobox stored codes ? i keep going back to my post that suggested a problem with the t.p.s . in my case it was unplugged. do you have e.p displayed on the ipk ? mine did not even when the t.p.s was disconnected. your description of jerking and clunk whilst the box goes up or down is exactly the same as mine did. quite forcefull too. worth checking before you strip the box down ... that will be some experience im sure !! (not to mention the cost and obtaining parts) have a look at t4 first if you can . all the best.

Hello, here in France we haven't T4.
I haven't ep displayed on the ipk.
Thanks you.

xsport · 17th August 2021, 21:02

you have to accept some jerking on the box.for example if you drive down a hill with foot off the accelerator and than lightly apply the footbrake for more than 2 or 3 seconds it will indeed change down with a jerk as the brake duty solenoid cuts in. thats normal. second to third on mine can be harsh at times but usually only when im accelerating hard. dont try to compare these nearly 25 yr old boxes with modern ones . not sure if you can access autobox with toaf as i dont have it. a member on here had electrical problems very recently which he thought was a mechanical issue but all was resolved with a fuse change. you could also try a battery reset if you have not already. and again pull out / inspect plug wires and spray/clean and reconnect the t.p.s sensor plug a number of times(under the throttle body housing.) its possible you could have a bad connection. nothing to lose here. .....

Shuriken_57 · 24th September 2021, 12:07

Hello guys, after changing my thermostat, I will now take care of my automatic gearbox.

I noticed that all my engine mounts were broken (I ordered them on dmgrs).
The hydramount is leaking and the others are cracked and move around a lot.

I would replace all this as soon as the parts are received. I hope the box will be smoother.

The gearbox oil level is good (oil replaced recently) and the solenoids are all good ( tested several times).
I'll keep you informed.

Goodbye, thank you for your answers.

bl52krz · 24th September 2021, 17:40

Renewing The mounts will make a big difference to how it feels when you change them.

Shuriken_57 · 3rd October 2021, 02:33

Good evening, I changed the engine mounts.

The gearbox is a little smoother now, but I always feel jerk in the second and third gears.

I’m driving like this for the moment, it's not akward.
Good bye.

17th August 2021, 19:20	#61
Shuriken_57 Avid contributor Rover 75 Join Date: Jan 2019 Location: Freyming-Merlebach Posts: 212 Thanks: 104 Thanked 21 Times in 12 Posts	Hello, I will now try to repair my gearbox. I always get jerks when I change gears, especially 1-2 and 2-3. I also get jerks when I’m braking. I drained the gearbox several times and the level is good. I tested the solenoids and they are all good. Last edited by Shuriken_57; 17th August 2021 at 19:22..

17th August 2021, 21:02	#64
xsport Posted a thing or two rover 75 club se Join Date: Apr 2011 Location: Leicester Posts: 1,636 Thanks: 358 Thanked 419 Times in 310 Posts	you have to accept some jerking on the box.for example if you drive down a hill with foot off the accelerator and than lightly apply the footbrake for more than 2 or 3 seconds it will indeed change down with a jerk as the brake duty solenoid cuts in. thats normal. second to third on mine can be harsh at times but usually only when im accelerating hard. dont try to compare these nearly 25 yr old boxes with modern ones . not sure if you can access autobox with toaf as i dont have it. a member on here had electrical problems very recently which he thought was a mechanical issue but all was resolved with a fuse change. you could also try a battery reset if you have not already. and again pull out / inspect plug wires and spray/clean and reconnect the t.p.s sensor plug a number of times(under the throttle body housing.) its possible you could have a bad connection. nothing to lose here. ..... Last edited by xsport; 17th August 2021 at 21:04..

24th September 2021, 17:40	#66
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,387 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Renewing The mounts will make a big difference to how it feels when you change them. __________________ Great Barr, Birmingham.

3rd October 2021, 02:33	#67
Shuriken_57 Avid contributor Rover 75 Join Date: Jan 2019 Location: Freyming-Merlebach Posts: 212 Thanks: 104 Thanked 21 Times in 12 Posts	Good evening, I changed the engine mounts. The gearbox is a little smoother now, but I always feel jerk in the second and third gears. I’m driving like this for the moment, it's not akward. Good bye. Last edited by Shuriken_57; 3rd October 2021 at 04:06..

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17th August 2021, 20:02	#62
xsport Posted a thing or two rover 75 club se Join Date: Apr 2011 Location: Leicester Posts: 1,636 Thanks: 358 Thanked 419 Times in 310 Posts	can you get her on t4 to see if you have any autobox stored codes ? i keep going back to my post that suggested a problem with the t.p.s . in my case it was unplugged. do you have e.p displayed on the ipk ? mine did not even when the t.p.s was disconnected. your description of jerking and clunk whilst the box goes up or down is exactly the same as mine did. quite forcefull too. worth checking before you strip the box down ... that will be some experience im sure !! (not to mention the cost and obtaining parts) have a look at t4 first if you can . all the best.

24th September 2021, 12:07	#65
Shuriken_57 Avid contributor Rover 75 Join Date: Jan 2019 Location: Freyming-Merlebach Posts: 212 Thanks: 104 Thanked 21 Times in 12 Posts	Hello guys, after changing my thermostat, I will now take care of my automatic gearbox. I noticed that all my engine mounts were broken (I ordered them on dmgrs). The hydramount is leaking and the others are cracked and move around a lot. I would replace all this as soon as the parts are received. I hope the box will be smoother. The gearbox oil level is good (oil replaced recently) and the solenoids are all good ( tested several times). I'll keep you informed. Goodbye, thank you for your answers.