e220 1994 auto gearbox problem

[e220merc]

Does anyone know whats wrong when I put the gear lever into reverse the car does'nt move but when I press the accelerator it jerks and goes back.

 

[Blobcat]

Idle speed too low?

 

[television]

Does anyone know whats wrong when I put the gear lever into reverse the car does'nt move but when I press the accelerator it jerks and goes back.

Do you only have the fault in R, you say there is a jolt, but does it then reverse OK. Is D OK.
Malcolm

 

[Sean Ng]

Does anyone know whats wrong when I put the gear lever into reverse the car does'nt move but when I press the accelerator it jerks and goes back.

Dear All

I wonder if anybody knows what is wrong with the same problem that I have experienced in my newly bought 1996 W210 E230 Auto Saloon with a 101k mileage.

I have checked the gear oil level and it seems fine. The colour of the gear oil is looks clear (not brownish).

Relating to gear, propeller shaft, engine mount or something else? Please advise, and, if possible, how to fix it on a DIY basis.

Regards
Sean Ng

 

[jibcl500]

Sometimes a failing MAF can give these symptoms, might be worth some diags to be sure.

jib

 

[Sean Ng]

Sometimes a failing MAF can give these symptoms, might be worth some diags to be sure.

jib

Hi Jib

Thanks for that. Will try cleaning the MAF and see how it goes. Any further suggestion please let me know.

Regards
Sean

 

[dbmoylan]

If transmission related, then change tranny fluid & filter & see how car reacts. Reverse gear failure is known problem on 722.5 & earlier trans. Sign of an impending rebuild once your front gears also begin flaring between shifts.

Check your fault codes & your neutral safety switch as well.

 

[Sean Ng]

Dear All

I wonder if anybody knows what is wrong with the same problem that I have experienced in my newly bought 1996 W210 E230 Auto Saloon with a 101k mileage.

I have checked the gear oil level and it seems fine. The colour of the gear oil is looks clear (not brownish).

Relating to gear, propeller shaft, engine mount or something else? Please advise, and, if possible, how to fix it on a DIY basis.

Regards
Sean Ng

Dear All

I have started the repair (and maintenance) by changing the engine mounts. The old mounts were 1/2 inch shorter than the new mounts. The result of this simple DIY job is that the car is now better moving backward in reverse gear, despite sometimes it jerks and sometimes it does not move at all. If I shift the gear manually to any other position and back into the reverse gear, the car will move backward again.

The next thing I shall try is to change the transmission oil and filter myself and see if there is any help.

Will post back after the 2nd DIY job.

Regards
Sean Ng

 

[kth286]

SEAN

should'nt your gearbox oil be bright red and no burning smell ????????

You say clear - what does that mean ?

 

[Sean Ng]

Hi David

I have checked the existing transmission fluid and it is quite red and there is no burning smell. Since I do not know the service history of the car, and the transmission is a 722.440 that requires changing of the fluid every 30,000 to 40,000 miles, I would like to change the fluid now. In this way, I shall see if it is the fluid condition causing the reversing problem; and I can keep a good service record.

If the changing of the fluid does not help, will check serveral things like: (1) rear shock absorbers; (2) differential including differential oil; (3) rear brakes including parking brake; and (4) propeller shaft including couplings.

I have seen several posts in the forum having similar problem but nobody seems to post back what the causes of the problem are and how to resolve it. Will do the above-mentioned checkings and repairs and see if I can sort it out.

Any suggestions are welcome.

Regards
Sean Ng

 

[Bolide]

It's possible the gearbox B3 piston clutch is worn & needs replacing

Nick Froome
www.w124.co.uk

 

[Sean Ng]

Dear All

I have sorted the issue out!

After I change the differential fluid, the problem is gone. My car has no more jerking and vibration when it reverses. It is now smooth.

The old differential fluid was so dark and sticky. When I measured its capacity, I was surprised that it was about 1.8 litre, which is not correct. The capacity for a 1996 W210 E230 differential should be around 1.1 litre. I suspect that area of maintenance had been overlooked, or ignored, for years.

Anyway, the concluded causes of my issue are:
(1) Worn engine mounts; and
(2) More importantly, sticky and overfilled differential fluid.

I feel I am lucky as my problem does not relate to transmission or engine.

I must thank those who have given me their comments and suggestions.

I hope this will leave a reference for those who may have the same problem as mine.

Regards
Sean Ng

 

[kth286]

Dear All

I have sorted the issue out!

After I change the differential fluid, the problem is gone. My car has no more jerking and vibration when it reverses. It is now smooth.

The old differential fluid was so dark and sticky. When I measured its capacity, I was surprised that it was about 1.8 litre, which is not correct. The capacity for a 1996 W210 E230 differential should be around 1.1 litre. I suspect that area of maintenance had been overlooked, or ignored, for years.

Anyway, the concluded causes of my issue are:
(1) Worn engine mounts; and
(2) More importantly, sticky and overfilled differential fluid.

I feel I am lucky as my problem does not relate to transmission or engine.

I must thank those who have given me their comments and suggestions.

I hope this will leave a reference for those who may have the same problem as mine.

Regards
Sean Ng

Dont get that diff capacity bit at all ??????????

 

[television]

Dont get that diff capacity bit at all ??????????

Maybe David he measured what he could get in, after draining rather than the total capacity

 

[Sean Ng]

Hi David,

The old oil drained out was about 1800ml, which is too much. The should-be capacity is around 1100ml.

Sean Ng

 

[television]

You always fill to the top of the stand pipe, where fitted

 

[kth286]

but how would somebody be able to keep filling it up at the same time it would be pouring out the filler hole ?

 

[television]

but how would somebody be able to keep filling it up at the same time it would be pouring out the filler hole ?

The oil filler hole is the stand pipe

 

[roofless]

i think if you top it up when the car is level on a four post ramp ect it's ok but if you check it on diy ramps rear end up the oil will pour out when you pop the top plug out & give the impession it's overfilled