i just recently purchased a 1984 300SD..has 200000 miles on it....but transmission was rebuilt at 130000 miles..when in high gear and you floor it ..engine reves up slightly....transmission seems like it is slipping....checked vaccume at transmission modulator and while in park it is registering 10 to 12 lbs of vaccume...any kind of adjustments i can make or is this sucker fixing to require a rebuild....thanks in advance

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1984 sd cream puff

My dad's 83 did this exact same thing before its recent (month ago) tranny fluid and filter change. Afterwards the rev increase in 4th gear when hitting the throttle was eliminated. Prior to the service it would go up by about 200-300rpm and even whistle sometimes. Other times when slowing down to around 15mph then hitting the gas it would lose all grip and rev up/whistle real loud till you let off and let it slowly "grab" and then it would go fine again. This was also eliminated by the fluid/filter change, I bet the filter was just real clogged up, it can cause lots of problems/odd behavior. Perhaps try that first?

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

i had already changed the filter and fluid...filter and fluid looked good....no metal...when cold...it shifts hard from 2nd to 3rd....this has got me stumped...unless the transmission is about gone...but it had a 1900$ transmission rebuild in 1999....plus torque converter....only happens in 3rd to 4th gear ....when you get on it..like it;s nothing there.........i replaced all filters including the one in the tank...new hoses....cleaned out the banjo fitting behind turbo charger......i;m stumped.........

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1984 sd cream puff

If this transmission has B2B that may be the problem. Sounds like mine just before that one blewup.
One thing ot look into before you go there would be the vacuum. The vacuum on this trans softens the shifts. Trace the vac line from the left side modulator and disconnect it, plug the engine side. Drive it, if the shifts firm up you may have a vacuum adjustment to do.

MB has a redesigned spring kit for the K1 accumulator. Go to the dealer and order a K1 spring kit. I just bought 2 spring kits from the dealer. I just gave them the part number: 126 270 44 77. They were $10.50 each. Have not installed them yet...

Go here for installation details.

www.mbz.org

Click on Articles, then Transmission, then K1.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Does this apply to the 1983 W123 too?

Great info.

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside

This is a fix for transmission slip/flare on 2-3 upshift at partial load for 722.3,722.4 and 722.5 automatic transmission.

I'm not sure which one the w123 300D has. Someone else chime in...

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Ah! Is this something they keep in stock or a special order item? Mine does that at low throttle but at WOT it's fine.

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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]

I just told them I need this such and such part number. I ordered two at $10.50 each and they came in less than a week.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

Awesome, I need to get that then... and my "Daimler Benz Product" window sticker... and have them make certain my car has hellacious miles to get my badges of honor for the grille.

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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]

i ordered the spring kit and the b2b replacement parts....i;ll try this and see what happens....let you know in a few weeks....hopefully i;ll have some luck..thanks guys

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1984 sd cream puff