Re: [MBZ] Delay Downshift Klunk
Thanks Mr. Jim Bob Rentfro - Original Message - From: [EMAIL PROTECTED] To: mercedes@okiebenz.com Sent: Monday, July 17, 2006 10:01 PM Subject: Re: [MBZ] Delay Downshift Klunk In a message dated 7/17/2006 8:05:53 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: SoI get off the freeway yesterday after driving home from the old nuke plant.I drop off my carpool charge and then get back on Indianschool Road, where the speed linit is 35mph. I drive about 2 miles at 38mph or so and approach a light. I slow down normally and then, a full two seconds after the car has stopped, the transmission klunks down into first. Odd. When the light changed, I was off normally and all subsequent shifting was fine. Just a random event or a precursor to heartache? Bob, No bigge! We're talking about your 77 300D, right? The trans is supposed to stay in 2nd until you move out. This is supposed to be easier on your braking foot since there is less torque being transmitted in 2nd. The hotter it gets, the slower the downshifts get. Occasionally, mine will sit in 2nd, then as I start off, a delayed downshift to 1st will occur. It will clunk rather sharply down to first. It is supposed to go to first at the first motion of the throttle pedal, then their is no shock wave. Mobil 1 ATF will cure, or at least raise the temperature at which clunking occurs. If it does it more and more often, look for a worn bushing in the lower end of the rod that goes from the throttle linkage down to the passenger side of the transmission. I think yours has that rod, some have a cable, and some don't have any mechanical feed back to the trans. Regards, Jim Friesen Phoenix AZ 79 300SD, 262 K miles 98 ML 320, 143 K miles ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Delay Downshift Klunk
Bob Rentfro wrote: Herr Doktor schreib: Your '77 300D should NEVER drop into 1st except when the kickdown switch is activated or the shifter dropped into 2nd! That's according to The Automatic Transmissions Maintenance Diagnostics manual MB 056 89 (3-89). A...Thanks for checking the manual, Herr Doktor. Actually, what it felt like was someone slightly nudged me in the rear at the light. The car pulled away normally in the correct gear. Everything has been normal today. Strange. When the transmission mount fails, you MAY experience sort of a clunk as the car slows to a stop - at least that's ONE symptom I've seen. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] Delay Downshift Klunk
In a message dated 7/17/2006 8:05:53 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: SoI get off the freeway yesterday after driving home from the old nuke plant.I drop off my carpool charge and then get back on Indianschool Road, where the speed linit is 35mph. I drive about 2 miles at 38mph or so and approach a light. I slow down normally and then, a full two seconds after the car has stopped, the transmission klunks down into first. Odd. When the light changed, I was off normally and all subsequent shifting was fine. Just a random event or a precursor to heartache? Bob, No bigge! We're talking about your 77 300D, right? The trans is supposed to stay in 2nd until you move out. This is supposed to be easier on your braking foot since there is less torque being transmitted in 2nd. The hotter it gets, the slower the downshifts get. Occasionally, mine will sit in 2nd, then as I start off, a delayed downshift to 1st will occur. It will clunk rather sharply down to first. It is supposed to go to first at the first motion of the throttle pedal, then their is no shock wave. Mobil 1 ATF will cure, or at least raise the temperature at which clunking occurs. If it does it more and more often, look for a worn bushing in the lower end of the rod that goes from the throttle linkage down to the passenger side of the transmission. I think yours has that rod, some have a cable, and some don't have any mechanical feed back to the trans. Regards, Jim Friesen Phoenix AZ 79 300SD, 262 K miles 98 ML 320, 143 K miles
Re: [MBZ] Delay Downshift Klunk
[EMAIL PROTECTED] wrote: In a message dated 7/17/2006 8:05:53 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: SoI get off the freeway yesterday after driving home from the old nuke plant.I drop off my carpool charge and then get back on Indianschool Road, where the speed linit is 35mph. I drive about 2 miles at 38mph or so and approach a light. I slow down normally and then, a full two seconds after the car has stopped, the transmission klunks down into first. Odd. When the light changed, I was off normally and all subsequent shifting was fine. Just a random event or a precursor to heartache? Bob, No bigge! We're talking about your 77 300D, right? The trans is supposed to stay in 2nd until you move out. This is supposed to be easier on your braking foot since there is less torque being transmitted in 2nd. The hotter it gets, the slower the downshifts get. Occasionally, mine will sit in 2nd, then as I start off, a delayed downshift to 1st will occur. It will clunk rather sharply down to first. It is supposed to go to first at the first motion of the throttle pedal, then their is no shock wave. Mobil 1 ATF will cure, or at least raise the temperature at which clunking occurs. If it does it more and more often, look for a worn bushing in the lower end of the rod that goes from the throttle linkage down to the passenger side of the transmission. I think yours has that rod, some have a cable, and some don't have any mechanical feed back to the trans. The '77 300D sits and starts in 2nd. The '79 300SD sits in 2nd, but drops to 1st when you start. They are NOT the same and can't easily be made the same (the valve bodies ARE different). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] Delay Downshift Klunk
Bob Rentfro wrote: SoI get off the freeway yesterday after driving home from the old nuke plant.I drop off my carpool charge and then get back on Indianschool Road, where the speed linit is 35mph. I drive about 2 miles at 38mph or so and approach a light. I slow down normally and then, a full two seconds after the car has stopped, the transmission klunks down into first. Odd. When the light changed, I was off normally and all subsequent shifting was fine. Just a random event or a precursor to heartache? Your '77 300D should NEVER drop into 1st except when the kickdown switch is activated or the shifter dropped into 2nd! That's according to The Automatic Transmissions Maintenance Diagnostics manual MB 056 89 (3-89). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] Delay Downshift Klunk
Herr Doktor schreib: Your '77 300D should NEVER drop into 1st except when the kickdown switch is activated or the shifter dropped into 2nd! That's according to The Automatic Transmissions Maintenance Diagnostics manual MB 056 89 (3-89). A...Thanks for checking the manual, Herr Doktor. Actually, what it felt like was someone slightly nudged me in the rear at the light. The car pulled away normally in the correct gear. Everything has been normal today. Strange. Bob Rentfro '77 300D 157K '87 Acura Legend 177K '01 VW Beetle TDI 67K waiting on '72 350SL 78K Litchfield Park, AZ
