Joined: Wed May 2nd, 2018
Occupation: Elevator Design Worlds Tallest Buildings
Interests: Ranger Based Vehicles and OFFROAD
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|you can bleed or vacuum all day, there is one bubble that gets trapped in the top of the master cylinder, no amount of bleeding or pulling will free it, you must remove it by changing the angle of the master cylinder and tapping on the side of it....you can watch tiny bubbles come up into the reservoir and if you get enough of them or one just a bit smaller then a pea....well then your clutch will finally let you into 1 and R
There are a few different ways to release it, one of them is to actually take the master cylinder apart real quick in the truck, hopefully not getting brake fluid all over your carpet and then put the lid back on.. I prefer the other way, simply remove it from the firewall, move it so the air bubble is no longer at the tip top, then tap on the side of it until the bubble appears...takes like 10-15 minutes.
I must have fixed about 10 trucks this way, including some of our own.
Before the internet was here and we shared information, I wish I knew about this bubble. I changed my clutch 3 times one summer and my 5 speed twice, even had a custom driven disc built, and still did not act right. I ended up converting from the M5OD to a A4LD because I did not know this trick. Years later I learned and then realized what what happening to the hydraulics all those years ago...
Last edited on Mon Jul 9th, 2018 02:37 pm by 410customs
I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks