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  #1  
Old 11-03-2007, 09:30 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 691
83 240D shift points

How do you adjust the shift points on these automatics? I replaced the levers on the 3/2 VCVs that are located on the valve cover and now the engine revs to high RPMs before upshifting. No flaring, no double shifts, no clunking on downshifts. There is no Bowden cable to adjust.

I will be checking my vacuum to the modulator today, but does increasing or decreasing it improve shift points. In a nutshell, I need it to upshift sooner. Thanks.

John
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2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
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  #2  
Old 11-03-2007, 10:23 AM
300SDog's Avatar
gimme a low-tech 240D
 
Join Date: Jan 2003
Location: central ky
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Where's it shifting now in relation to shift points on the speedometer? Can ye hold 3rd gear up to 55/60mph? Oughta be able to hold gears long as ye like by feathering the accelerator. For example, not hammering down but letting it glide at higher rpm's. Then pushin pedal to floor and quickly lettin up when you ready to grab higher gear.
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  #3  
Old 11-03-2007, 10:58 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by DieselDog View Post
Where's it shifting now in relation to shift points on the speedometer? Can ye hold 3rd gear up to 55/60mph? Oughta be able to hold gears long as ye like by feathering the accelerator. For example, not hammering down but letting it glide at higher rpm's. Then pushin pedal to floor and quickly lettin up when you ready to grab higher gear.
When driving these daily you want them to shift effortlessly with having to let up on the accel to induce a shift. Far better to have it shift how you like it for average driving, then the stick can be used if harder accel is necessary.
I will let others more familiar with your setup advise on changing your shifting. It will be done either with your VCV or the modulator on the tranny I suppose.....
My 80 wagon did not have a VCV, so the shift point for it were controlled at the tranny modulator.
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'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #4  
Old 11-03-2007, 11:06 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 691
Quote:
Originally Posted by JimmyL View Post
When driving these daily you want them to shift effortlessly with having to let up on the accel to induce a shift. Far better to have it shift how you like it for average driving, then the stick can be used if harder accel is necessary.
I will let others more familiar with your setup advise on changing your shifting. It will be done either with your VCV or the modulator on the tranny I suppose.....
My 80 wagon did not have a VCV, so the shift point for it were controlled at the tranny modulator.
This car is a daily driver for my 16 y/o daughter. I don't want her to have to think about feathering. Thanks Jimmy. Need an answer.

John
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2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
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  #5  
Old 11-03-2007, 11:11 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
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Quote:
Originally Posted by hangit View Post
This car is a daily driver for my 16 y/o daughter. I don't want her to have to think about feathering.
John
That is a great car for a 16 y/o. I commend your choice!!
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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #6  
Old 11-03-2007, 12:24 PM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 691
Ok guys and gals, the vacuum to the tranny modulator is 20" at idle. It drops to 4" at mid throttle. The vacuum to the tranny does not pass thru the adjustable vacuum control valve. This appears to be the correct routing based on the diagram for my car. The vacuum drops are governed by the 3/2 valves located on the valve cover.

John
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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
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  #7  
Old 11-04-2007, 10:47 AM
83 300SD
 
Join Date: Mar 2007
Location: Shawano, WI
Posts: 691
Just wanted to follow up with everyone. I went out and rechecked the 3/2 vacuum switch tubings and found I had mixed two of them. Now with them connected on the proper nipple, the car shifts fine.

John
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2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI
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