Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: FresnoBob on June 11, 2019, 23:11:19

Title: Transmission modulator pressure measurement
Post by: FresnoBob on June 11, 2019, 23:11:19

I cobbled together the attached liquid filled pressure gage and 8M banjo connections.  With vacuum disconnected, the transmission measures over 100 psi in forward gears at idle.  Something is wrong, as the transmission shifts well, but perhaps not quite as briskly as it should (compared to a friend's rebuilt 230 SL transmission). 

Any ideas as to what I'm doing wrong? 

Title: Re: Transmission modulator pressure measurement
Post by: mbzse on June 11, 2019, 23:34:37

Quote from: FresnoBob

.../...Any ideas as to what I'm doing wrong?

Are you sure you are using the correct point (port) for attaching the hollow screw/banjo?

Title: Re: Transmission modulator pressure measurement
Post by: ja17 on June 12, 2019, 01:51:06

Yes, make sure your on the right test port and the vacuum to the modulator is disconnected.

Title: Re: Transmission modulator pressure measurement
Post by: mbzse on June 12, 2019, 07:43:45

In order to perform the more advanced workshop and maintenance tasks, I would advise to have the factory literature at hand. Like the Book of tables or the BBB manual.

Attached an image with the test port for modulator pressure (No5) indicated

Title: Re: Transmission modulator pressure measurement
Post by: FresnoBob on June 12, 2019, 16:52:51

Based on earlier advice, I was attached to port 4.  I'll try again today! 

Title: Re: Transmission modulator pressure measurement
Post by: Pawel66 on June 12, 2019, 21:07:15

Yes Bob, I am sorry, I was not sure that is why I asked. Now it is clear. I removed the posts to avoid mistakes. I am sure now you will get there.