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Author Topic: No power in reverse  (Read 250 times)

Offline martiny25

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  • Posts: 3
  • Thanked: 0
  • Model: Alhambra Mk2 Auto
  • Spec: 04 1.9 TDI 115 SE
  • First Name: Martin
  • Region: South
  • Country: United Kingdom
No power in reverse
« on: March 29, 2020, 04:19:43 PM »
Hi, I'm new to the forum so please be gentle.

I have a Seat Alhambra 2004 plate, 1.9tdi Auto, that has been a right pain the last few weeks.
Currently the car has no power when engaging reverse gear, the car will reverse but only under its own power whilst idling,  it cant seem to transfer any power from the engine to the wheels, pressing the accelerator pedal increases the revs but doesn't do anything else. The car works fine going forward, gears change smoothly.
I have managed to do a oil change on the gearbox using a kitchen thermometer replacing approximate 3LT of oil which hasn't improved anything.

Last week the car had 20lt of petrol added to 5LT of diesel and then driven 4 miles before breaking down, the car was then brought home on a breakdown truck and the tank emptied and refilled. Upon 1st starting, the car was running rough  and wouldn't reverse and on the initial drive it entered limp mode. Came up with an error code for the MAP sensor(G71) and the gearbox temp sensor(G93), checked to find the MAP sensor had came loose. Cleared all codes and everything seemed fine, car reversed ok and drove like normal.
Next morning the reverse problem reappeared and has been like it since, I have taken it out for a few long drives to get it hot but it still wouldn't reverse, there are no current codes stored.

I'm sort of at a loss on where to look next so any advice would be much appreciated.

Offline brianh

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  • Posts: 722
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  • Model: Galaxy Mk2
  • Spec: 2001 2.3 Ghia LPG
  • First Name: Brian
  • Region: South East
  • Country: United Kingdom
Re: No power in reverse
« Reply #1 on: March 29, 2020, 06:36:40 PM »
When your filling the oil, theres a specific process to follow - details are here > https://www.fordmpv.com/smf2/ford-galaxy-common-faults-and-problems/ford-galaxy-automatic-transmission-fluid-replacement-level-check-(ag5-09b)/

The critical bit is the final fill, where you want the engine running to check the level. Is that what you've done? if not, its probabbly still a bit short of oil. If you've taken the drain plug out, it should be closer to 5lt to go back into the box to fill it up again, so 3lt would suggest its still a bit low.

What sort of condition was the oil you removed in? if its particually poor, it may need another go to get the majority of it out of the box.

Offline johnnyroper

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  • Model: Galaxy Mk2
  • Spec: 02 tdi 115 ghia
  • Region: South West
  • Country: United Kingdom
Re: No power in reverse
« Reply #2 on: March 29, 2020, 10:15:15 PM »
Was the problem evident before oil change?

If so I would be looking at a potential solenoid issue,if itís been since like change confirm oil level is correct before going any further as per advice above

Offline martiny25

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  • Posts: 3
  • Thanked: 0
  • Model: Alhambra Mk2 Auto
  • Spec: 04 1.9 TDI 115 SE
  • First Name: Martin
  • Region: South
  • Country: United Kingdom
Re: No power in reverse
« Reply #3 on: March 30, 2020, 02:53:05 PM »
The problem was there before the oil change, I had followed the instructions in that link, but don't have access to vcds so dropped some oil into a container every now and then and used a thermometer to check temp, so I am pretty confident the oil level is correct.
The oil was very black and a lot thicker then the new oil, the car hadn't been serviced in a very long time before I brought it. Would it be worth changing it again to get more out, can bad oil actually prevent the car reversing.

Offline brianh

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  • Posts: 722
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  • Model: Galaxy Mk2
  • Spec: 2001 2.3 Ghia LPG
  • First Name: Brian
  • Region: South East
  • Country: United Kingdom
Re: No power in reverse
« Reply #4 on: March 30, 2020, 03:59:17 PM »
It may be that you've got some of the gloopier oil gumming up the reverse solenoid. General advice is to swap as much as you can out, and the change it again in the same fashion, warming it up by driving for a bit beforehand (the new oil will hopefully then dilute the older stuff to a point where you get most of it into the sump and drained out).

The other usual souce of problems can be the solenoids - info on those here
https://www.fordmpv.com/smf2/ford-galaxy-common-faults-and-problems/ford-galaxy-09a-automatic-gearbox-failure-to-upshift-when-cold/

It might be worth pulling the cover off as detailed and seeing if you can clean them up, though given the work involved its more likely you'd be better to replace them if you think they are at fault. The thread does detail doing some testing on them, which you could potentially do before spending cash on replacing them. I can't see any one particually causing just reverse to be a problem going on the table there, are you sure its ok in every other gear?

If you don't have VCDS what are you using to read the codes?

Offline johnnyroper

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  • Posts: 2789
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  • Model: Galaxy Mk2
  • Spec: 02 tdi 115 ghia
  • Region: South West
  • Country: United Kingdom
Re: No power in reverse
« Reply #5 on: March 30, 2020, 10:29:51 PM »
I believe there are 9 solenoids in total in these gearboxes most problematic for reverse are N90, however the brake band also causes issues with reverse.

Given the car will reverse under own power on idle that suggests it is engaging reverse ok and as you have done oil and are sure itís ok I would suspect the brake band is at fault. This would require a box removal and strip down so more of a job for a specialist auto box place.  Only other thing I can think is the reverse piston not holding pressure.

Offline martiny25

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  • Posts: 3
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  • Model: Alhambra Mk2 Auto
  • Spec: 04 1.9 TDI 115 SE
  • First Name: Martin
  • Region: South
  • Country: United Kingdom
Re: No power in reverse
« Reply #6 on: March 31, 2020, 01:32:36 AM »
I use a generic vw code scanner to read the codes, got it from ebay a few years back and it seems to do the job ok.

The car drives perfectly in the other gears, both in manual and auto mode, gears change smoothly, sounds like I'm gonna have to get those solenoids out and test them, that will give me something to do over the weekend I guess, along with another oil change.
Fingers crossed this works I don't really wanna remove the gearbox to get it repaired or replaced, looks a right pain to do without a ramp.

 

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