Quote:
Originally Posted by Diesel911
The rough shifting could be due to too much vacuum getting to the Transmission Vacuum Modulator. There is a white plastic Valve on the back of the Fuel Injection Pump that controls this.
If the vacuum is OK your problem is most likely due to wear in the Transmission.
Here is some info that will explain things in detail:
http://www.continentalimports.com/ser_ic20242.html
I was having harsh shifting from 1-2nd. When I changed my Transmission Fluid I added some Lucas Transmission Sealer and that helped a lot. But the Vacuum issue needs to be checked first.
Do it yourself links:
http://www.peachparts.com/shopforum/forumdisplay.php?f=82 |
Harshness or softness of shifts is controlled by vacuum. However, I'm virtually certain that too harsh a shift is not caused by too much vacuum but by too little vacuum. Hence, the odds are you have a leak in the vacuum system somewhere causing an overall reducation in vacuum and therefore harsh shifts. A simple test you can perform to see whether the vacuum leak is in the climate control system is to push the far right button, shutting off the climate control. If your shifts improve, particularly downshifts, then it shows you have a leak somewhere in the climate control system causing your harsh shifts.
Door lock vacuum on 126 SD's is created by an electric pump so that system is separate from the vacuum system associated with engine and transmission operation.