Good evening all

I have a 1986 Mercedes 300 SDL 280, 000 miles. I just had the transmission rebuilt and I have noticed two problems.

1. The car is slower than normal and takes some time to reach normal speeds. Once she gets going, it will reach normal speeds. When I think about it, the turbo may not be kicking in either. The guy that did the rebuild said that the transmission I gave him to rebuild was slightly different from the one in the car. He said the one in the car was electronic Nd the one used to rebuild was a mechanical setup. He said he made the adjustments to the rebuilt one to make it work.

When I got the car yesterday, he said to check out the throttle body. That is why I am coming to the forum for suggestions ?

2. The speedometer and odometer isn't working. Neither was working prior to the the rebuild and still not working. The mechanic suggested I replace the speed sensor on the side of the transmission. I went to ths Mercedes dealer and they said the wiring harness is over $300. One of the techs at the Mercedes dealer suggested it might not be the wiring harness for the speedometer, kickdown switch and etc.

Help me on where to start....

Thanks in advance

Ron

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Wow, he suggested check the throttle body on a Diesel?



Have you checked the fuses? Have you swapped a known good cluster?



Check the linkage at the firewall, the 10mm nut can loosen and give you very little pedal travel... thus very little fuel.



Did you have your existing transmission rebuilt or what? I am not following what you have done

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

1. I purchased a donor transmission and had it rebuilt. Then he took my car and swapped out the old transmission for the newly rebuilt one.

2. I will check the fuses. Any particular ones I should focus on?

3. I have not swapped out a known good unit. Can I use a donor from a gas or diesel?

4. So which way should I turn the nut for the lingage?

Thanks

Ron

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So was the donor transmission from a 300SDL?



You will have to check the fuse list to see what runs the gauges, I do not know off the top of my head. Also, if you have never cleaned the holding pins... go ahead and do them all while in there.



Cannot say with certainty, but I figure a gasser speedo head would work... it will not read accurately due to gear ratio differences.



Snap a photograph and post the linkage up. I can then compare it to mine, this happened to my SD and SDL... both were so slow, they could barely get out of their own way.

Of course you may have an issues with the ALDA or the over boost protection valve.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Tell us which transmission has been fitted. There are some numbers starting with 722... on the right hand side of the transmission casing just above the oil pan.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

If I read the numbers correctly:

721-2712101

Understand that I had a whole lot of belly trying to wiggle under that car.... trust me, it wasn't very pretty.

The turbo is not kicking in and it did prior to the install.

Attached Thumbnails

     

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Unfortunately those numbers mean nothing to me (oh Vienna).

You need to find a set of numbers on the transmission in this form 722.XXX (we need to know what the XXXes are)

Of course if you have no turbo boost...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I will snap a pic of the linkage of which I am speaking, if you turned that camera 90°... that is the area.

Do you have a boost gauge to verify no boost? Usually 603s have low fueling issues making them dogs. Bad ALDA, plugged overboost solenoid, and slipped linkage are the common causes. Even the plugged catalyst on the '87s and CA '86s too.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Finally found the correct numbers:

722.317 02891647

These number came off the transmission

Ron

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1986/7 300SDL should have 722.321 tranny
1987 300D has 722.317.

They can both mate into the OM603 engine but I do not know the difference between the tranny.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

Well it sounds to me like the speedometer drive was swapped over.

I don't think that there's any real panic to be had between the two transmissions - I don't know the exact differences between the two; if you have any trouble between the two it would probably be shift points.

What kind of deal was made with the person who did the work?

It sounds a bit strange to me that the turbo appears not to be working and the speedometer doesn't work and yet you're not taking it back.

What's the story?

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

the 317 has a mechanical speedometer gearing, the 321 has the electronic speedometer drive...

no turbo could mean the tech attached vacuum to the alda... or broke the alda hose, or any number of other problems keeping the alda from enriching the fuel...

yeah... the mechanic wants you to check out the throttle body? um... there's no throttle or throttle body on this diesel... perhaps he means the rack on the IP? or the ALDA ? maybe he meant the wastegate? oh... he might mean the arv... it's a throttle of sorts... and if it's disconnected, but still attached to the air plenum, you'd be running little air... do you have black smoke?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Thanks for all of the input. The speedo didn't work prior to the rebuild. I am willing to think there is something wrong with the speedo unit itself. The turbo issue, there isn't any black smoke. As mentioned, it is sluggish an eventually reach normal speeds.

I am trying to understand the issue for myself. I also wanted to understand that the transmission used was compatible.

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Disconnect your alda completely. Drive. see if you have turbo. if you have turbo then there is a clog in your boostline. these things scunge up with carbon sometimes and just blocks. try swapping your cluster for a diff one, I had a space cluster but I sold it. they are pretty interchangeable but if you can find a diesel one.

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

Thanks, I will try that and report back.

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