W124 Auto box compatability

[pikeydave]

I'm looking for whether the 4 spd auto gearbox in my '95 E300TD Turbo would be exactly the same as a non turbo E300.

Cheers.

Dave

 

[television]

The 300D uses the 722.415 and the 300TD uses the 722.357

 

[pikeydave]

The 300D uses the 722.415 and the 300TD uses the 722.357

Just to clarify, are you differentiating between saloon and estate or turbo- non turbo 3.0l W124s (I do have a LHD turbo-diesel I'm not getting confused with badging!)

 

[television]

No purely the 300D in any form and year uses the 722.415

The 300TD uses the 722.435

The 300turbo diesel uses the 722.317 up to 09-89 as of then up to the end of the run the 722.357

 

[pikeydave]

Thanks so far TV.

300D 722.415

300TD 722.435

300turbo diesel 722.357

OK. So what would be the internal differences in these boxes? Would there be slightly different ratios etc but overall gearing would mostly be affected by the diff ratio I presume?

Ultimately, would I be able to tell any appreciable difference in driving the car.

 

[television]

The ratios are the same, I believe any difference to be in the torque convertor


You can find others that may be near just by clicking on each car and reading the gear box in the right hand side

http://www.detali.ru/cat/oem_mb0.asp?TP=1

 

[pikeydave]

The ratios are the same, I believe any difference to be in the torque convertor


You can find others that may be near just by clicking on each car and reading the gear box in the right hand side

http://www.detali.ru/cat/oem_mb0.asp?TP=1

Thanks Malcolm for the help and the link. I'll leave you alone now and do my own digging!

Cheers.

Dave

 

[steptoe]

Pikey, gearbox gone pop ???

 

[Number_Cruncher]

My 1995 W124 non-turbo E300D estate (124191) has a 722.435 gearbox - incidentally, with no switches by the selector at all.

 

[pikeydave]

Pikey, gearbox gone pop ???

Going in with a jerk on all changes. It's done over 300kms. I reckon all the little clutches are worn out. I've got a 5 speed manual and pedal box for LHD but I'll look at a bit of auto swapping first.
Is nowhere safe to lurk away from you?

 

[television]

Going in with a jerk on all changes. It's done over 300kms. I reckon all the little clutches are worn out. I've got a 5 speed manual and pedal box for LHD but I'll look at a bit of auto swapping first.
Is nowhere safe to lurk away from you?

Have a word with the "Exeter gear box center" see if they can get a new torque converter for you

 

[steptoe]

. It's done over 300kms.

Is nowhere safe to lurk away from you?

Not while your running old smokers - Mine is up to 275K miles now without any mechanical dramas (algae contanimated fuel doesn't count).

 

[Number_Cruncher]

The first thing I would check for is a loss of vacuum to the modulator valve. All it would take is a leak at a connection, and the modulator will react as if the engine were at full load, and change sharply to avoid slip.

Failing an actual vacuum leak, I would also check to make sure the vacuum pipes are connected correctly - it's quite a complex circuit on these cars, there are a number of valves and restrictors all of which aim to mimic the manifold vacuum signal from a petrol engine.

I would be surprised if this fault is expensive to fix.

 

[television]

This is the vacuum sustem on that box

http://www.detali.ru/cat/oem_mb2.as...A=722.357&CT=GA&cat=09C&SID=27&SGR=195&SGN=09


When pipe off, lumpy jerky changes take place

 

[pikeydave]

OK. Will investigate and report back.

 

[pikeydave]

The first thing I would check for is a loss of vacuum to the modulator valve. All it would take is a leak at a connection, and the modulator will react as if the engine were at full load, and change sharply to avoid slip.

Failing an actual vacuum leak, I would also check to make sure the vacuum pipes are connected correctly - it's quite a complex circuit on these cars, there are a number of valves and restrictors all of which aim to mimic the manifold vacuum signal from a petrol engine.

I would be surprised if this fault is expensive to fix.

This might make more sense with my symptoms (and, if correct, puts doubt on the "auto specialist" I took it to) as the jerkiness is in all gears (more pronounced in 3rd-4th changes) and it came on suddenly. Also under full acceleration changes feels normal. I'll study the pneumatic circuits and see if I can trace a leak.

 

[Bolide]

Is this a UK E300 Diesel or a turbo left-hooker? They are different

If it's a UK E300 Diesel, and it's suddenly making jerky shifts, then most likely the vacuum pipe has dropped off the middle of the inlet manifold cross pipe

Nick Froome
www.w124.co.uk

 

[pikeydave]

Is this a UK E300 Diesel or a turbo left-hooker? They are different

If it's a UK E300 Diesel, and it's suddenly making jerky shifts, then most likely the vacuum pipe has dropped off the middle of the inlet manifold cross pipe

Nick Froome
www.w124.co.uk

It is the Creme de le Menthe of W124 diesels. LHD+Turbo.

 

[Number_Cruncher]

>>middle of the inlet manifold cross pipe

Yes, taking the cross-over pipe off should enable you to see all the important parts of the vacuum system which are normally hidden from view - you should be able to see the vac pipe diappearing down towards the bellhousing which goes to the modulator valve.

Usually, if these gearboxes can be made (by unplugging the vac pipe to the modulator) to change hard, then, generally, they are OK inside. When worn, you are more likely to get soggy shifts with engine flare and slip.

 

[meanie]

Don't forget to check the modulator valve itself as well.