You need a bigger hammer
And Marty, when did you become so knowledgable about slushboxes? I thought it was your lifelong desire to equip all vehicles with a third pedal?

You're welcome for the 205 shifter boot inspiration
Also the 208 and the NV4500 should be identical pigtails. You might have some crud inside the plug on the trans preventing it for going in all the way. Also it only goes in one way so make sure the clip on the pigtail lines up with the tab on the switch.




Very cool with the clutch!
In the video i'd say your yoke is worn out...i had to replace one on my 02 Duramax because the cups were spinning.

I'll be getting more on the way home tomorrow.
Instead of a spacer, can you just mount the slave cylinder on the other side of the mounting flange?

What I did on my F150 was wire a light up rocker switch on the shifter that parallels the factory trans switch. So either the trans could control the reverse lights or I could with the switch. Could always do that for right now until you get the trans one in place.

Once that hump goes on, I won't have so much motivation to take it back off. If I don't wire it up now, it may not ever happen. A manual switch wouldn't be so bad. But again, the lights do not currently work, and it's a low enough priority that cold weather may well shut it down.![]()
I don't blame you, FWIW I did all mine without ever pulling the carpet out. I was able to reach up around the transmission to do it. But I've got long arms which helps

I poured a 5th quart through the reverse switch hole as I have read good things about overfilling this tranny.
Today's progress:
Diagnosed and repaired a burned-up contact on the blower fan switch. The fan now blows, though it had a hideous bearing squeal for the first couple minutes. It moves much more air than Big Blue's HVAC system, so that's another vote in favor of putting some modern blowers in the fleet.
Cleaned out all the tools, parts, bolts, and general junk in the front seating area (did the rear last week). It now looks like a vehicle instead of a storage unit.
Installed seat belts & the stock vinyl passenger-side bucket seat. It sits noticeably taller than the cloth seat on the driver's side.
Finished oiling the tranny. GM's NV4500 spec says 4 quarts from empty to full. It took exactly 4 quarts, so it was much, much dryer than I had thought.I poured a 5th quart through the reverse switch hole as I have read good things about overfilling this tranny.
Repaired the NP208 wiring. Turns out that the connector and/or switch are flaky, so it only mostly works.
Installed trans tunnel and reattached NP208 shifter.
I rowed through all the gears and took it up to what I estimate as 45MPH (speedo cable is still broken). Gear noises are all gone, the entire drive train does exactly what it should.
I clicked the Detroit a couple times (and also squealed the tires pretty badly once). It is simultaneously not as big a deal as I had thought and also something that will redefine my driving style to avoid hard U-turns. I did slightly grind going into 3rd and 4th, but that could well have been user error combined with 20* temperatures. 5th shifted perfectly, so that's a nice improvement.