E37Bruco

Ok thanks. That seal should be here later next week. Then I can throw this all back together and road test it again for rear axle behavior. Otherwise we dive into body work!

I'm not sure when I'll be at the truck again but looking at the diaphragm cleaned up I found a seal where that barrel slides. Ordered a new Timken version of it 🤞 (480356). I'll still look to see if there's a seal between the shaft and that barrel.

That diaphragm was FULL lol but after cleaning everything up the rubber looks great. Sprayed it with some wd40, gonna eat it sit then some meguiars rubber conditioner There's a race that the shaft slides on. But I see no remnants of a seal on this side of the setup

Yeah I'm going to take this home and do it on my bench 😳

Oh fun hahaha But is oil present on the axle side of the diaphragm normal? Just seems weird if there's nothing preventing engine vacuum from pulling gear oil

Okay next time I'm there I'll pull that apart. The condition of the rubber hose and what I saw from that little inspection plug on top look like there was a good coating of oil all through the vacuum diaphragm assembly. If this is an issue do you believe I'd be able to send this shifting diaphragm to white post?

We are pretty focused on body work here now. Took some work to pull the rusted water tank out. I'm taking this opportunity to replace the rubber vacuum hose for the rear axle shift. When I pulled it I found gear oil inside it. I removed the little plug on top of the vacuum actuator and you can see everything in there has a residue of oil. Is this normal?

Lol I'm not there yet. Can't get downshifting figured out yet. I'm doing a lot better moving up the gears tho.

Look at you with factory fresh air lol

Is the threaded hole on the bottom solely for securing it to the firewall bracket? Just making sure that doesn't need plugged

This is the vavle I have. Not the Eaton one. Part number brought up a Ford one on eBay. There it showed the bottom port plugged. Mine isn't. (Photo is rotated sorry) mines intake vacuum on the left, to rear axle on the right, speedo adapter out the back. With the adjustments it's definitely an easier movement and can feel the click when pushed in. Drove it a little without issue but really need to get it up to higher speeds to test.

Going thru photos i found this. If I drove with it like this it would be in high

Ok. I plan on removing the shift control cable and vacuum valve to go through them meticulously. There isn't a lot of travel going from low to hi, it only moves maybe 1-1.5" up. I wonder if it's never really pushed down enough for low to maintain. I saw a video of a Chevy 2speed rear and that control knob came up like 3".

Road test went amazing! She has so much power and purrs right along. No issues again with the engine. Also the rear 2speed is still trying to switch to high while you're in 4th and 5th cruising. Should I pull the diaphragm and have it rebuilt? Maybe a broken spring? Can also hear the gears back there occasionally when coming to a stop with the clutch disengaged, like the shift forks bouncing between high and low, or bad backlash on the ring/pinion. It's not all the time tho so i want to rule out the ring/pinion.

Disregard. Got it broke loose. Set at 3° advanced. 520rpm idle and mixture screws set. Time for road test.