1987 300d automatic w124 3/4 upshift

[Bob Hill]

Can anybody help
With the vac pipe connected, going from 3rd to 4th I get slip.
With the vac pipe disconnected it works ok but obviously has a very harsh gear change. Anybody any ideas please.
Many thanks
Bob Hill

 

[Bolide]

Check the vacuum system for leaks or blockages. The modulator diaphragm may have failed or the modulator needs adjusting

A competent automatic transmission specialist should be able to set the pressures correctly if there are no faults

Time to break out the vacuum gauges and go looking for leaks!

Nick Froome
www.w124.co.uk

 

[Bob Hill]

Thanks Nick
Will try that
Regards
Bob Hill