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  1. Ben A...

    Gutting a 904 by Precision Transmission [new vid]

    They're back at it again! Great video I gotta share for those of us who don't live on YouTube. Main vid: And here's a nice teaser from a few days ago... cool car.
  2. Ben A...

    Headlights off with key.

    Hahah, fantastic idea. Perhaps I should wire this voice module for a few things... Even the kickdown "ooo! faster!"
  3. Ben A...

    Headlights off with key.

    Hmm... a buzzer! I suppose my interest in safety is greater than my hatred of buzzers. Interesting, thank you. Very straight forward wiring. Out of curiosity... What are the safety considerations for the headlights to be wired hot? I suppose if I wired headlights to power only with key on, and...
  4. Ben A...

    Headlights off with key.

    That's a much better approach than what I had in mind. Safer, easier. Thank you sir!!
  5. Ben A...

    Headlights off with key.

    Hey, My car is 73 Duster. I keep leaving my headlights on with the engine off when I park the car. Can I modify the light switch so it only has power with key on position? Would that mean just switching the tan wire to a key-on accessory fuse? Would this affect other electronics in the car...
  6. Ben A...

    All original 727 disassembly video from Precision Transmissions

    Their videos are great. I think only one video on 904s though :(
  7. Ben A...

    All original 727 disassembly video from Precision Transmissions

    Cool video I thought yall might want to see... Uploaded today by Precision Transmissions. Pretty neat.
  8. Ben A...

    Lurching problem and I'm out of ideas.

    On the bright side I have the holidays off work and I'm not visiting family... So I have a good 300 hours to figure this one out before 2022. I'll even go as far as rebuilding the dang engine or trans (i purchased a trans build manual). :|
  9. Ben A...

    Lurching problem and I'm out of ideas.

    @pishta and @CudaFactHackJob I'm certain it's an A999 as I've cross referenced the serial # a few times to verify. I'll hop under there again today and get the #.
  10. Ben A...

    Lurching problem and I'm out of ideas.

    Sorry, I should have clarified that... It only whines on the highway in 3rd at about 2500rpm. The source of that whine is certainly the rear end. I know it's not good, but I understand that's fairly common.
  11. Ben A...

    Lurching problem and I'm out of ideas.

    Thank you for the in depth thoughts here! My initial thoughts have always been engine related, but at this point I've checked so many things I'm erring to driveline. I've already changed the O2 sensor, collector flange gaskets and the header manifold gaskets -- no leaks. What you describe...
  12. Ben A...

    Lurching problem and I'm out of ideas.

    It's a 489, so cone type. Thank you KosmicKuda!
  13. Ben A...

    Lurching problem and I'm out of ideas.

    Easy tests to do! I like you're thinking. Disk front and drum rear. I've inspected the brakes a few times in the last year but no luck finding the issue there. That said, I have to grease the backing plates on the rears so I'll take another look.
  14. Ben A...

    Lurching problem and I'm out of ideas.

    I believe a mid 1980s A999 is controlled hydraulically by the valve body?
  15. Ben A...

    Lurching problem and I'm out of ideas.

    Thank you for the input-- Interesting theory here. I've tried going from RC11YC plugs to RC9YC plugs and using high octane fuels. Ive timed from 14-20 at idle and used slow and fast timing curves. Also no vac advance. But the problem persists. Right now I have EFI on the engine, but I can switch...
  16. Ben A...

    Lurching problem and I'm out of ideas.

    Ever since the shop told me I have a "funny one" I drive around listening/feeling for everything like a paranoid mad man. Second guessing one sound or symptom!
  17. Ben A...

    Lurching problem and I'm out of ideas.

    Thank you for the help. My knowledge of driveline is weak but this makes a lot of sense to me. It also might be why the transmission shops are confused, because they don't expect a lockup is in there... I take it to shops because I've moved to a new state with only my luggage, some tools, and...
  18. Ben A...

    Lurching problem and I'm out of ideas.

    I haven't experienced any issues with tight turns at that low speed. Only noticed it when coasting down from a higher speed than I would likely do in a parking lot. That said, I'll do that neutral test today and also try in a parking lot... Maybe I just haven't noticed it. I haven't paid too...
  19. Ben A...

    Lurching problem and I'm out of ideas.

    Thank you for the help Bad Sport! I'll do the coast-neutral test again today, the annoying part is I have to drive around for a long while before it starts happening. About two years ago I purchased it from a yard that 'rebuilt it' and it immediately it was whining. So I took it back and they...
  20. Ben A...

    Lurching problem and I'm out of ideas.

    If this is a symptom of a busted suregrip then that helps a lot. The guy who 'rebuilt' the rearend was always a little suspect in his worksmanship.
  21. Ben A...

    Lurching problem and I'm out of ideas.

    I believe it's cone (see previous comment). I've tried shifting to neutral and I believe the problem has gone away, but I'll have to try again because I last did that many months ago before my other fixes.
  22. Ben A...

    Lurching problem and I'm out of ideas.

    Warning... My knowledge is weak with trans/driveline tech. I was told it's a cone type when I got it, but I have not verified myself and the seller was a bit of a yahoo -- he could be wrong.
  23. Ben A...

    Lurching problem and I'm out of ideas.

    This could be a 12 paragraph explanation, but I’ll try and keep it short. I’ve been problem solving this for months and can’t figure it out. My question: Is it possible for a rear end to cause this? Can a torque converter be in bad shape and not leave metal shavings in the trans pan? Vehicle...
  24. Ben A...

    Solenoid to EFI on/off signal wire

    Thanks for the tips! I appreciate your other posts on IGN1/2 also--very helpful and clear. When I installed that solenoid I didn't know it drew 2.5amps unless off. Only discovered that after... I regret it.
  25. Ben A...

    Solenoid to EFI on/off signal wire

    Noob here -- I assume this is a simple answer to most of ya... I already have a toggle switched solenoid from my battery that runs inline to power on/off my starter power supply cable (linked below) Can I use that same switched solenoid output to power the on/off signal wire to my Sniper EFI...
  26. Ben A...

    LA Area Trans Rebuild

    Hey folks, Anyone have a recommendation for a good transmission rebuilder? My 904 is about dead and there are too many shops to choose from. Looking for a shop that works with a lot classics. Also, I think I need to beef it up so looking for a good rebuilder... Thank you, Ben
  27. Ben A...

    a904 NSS change without draining 'trick'...

    I just moved to a new city and have no friends to use their lot I park in my landlords driveway, and she was very firm about no messy repairs. And I have a bad track record with messes. I should try the local AutoZone, good thinking... I didnt realize that might be legal. Thanks guys. Good...
  28. Ben A...

    a904 NSS change without draining 'trick'...

    My apologies--probably a silly question but I ask a lot of those... I need to change the NSS on my a904. But I can't drain the fluid and must do it as quickly as possible. I've read that some people jack up the drivers side of the car so the ATF doesn't blast out the threads when the NSS is...
  29. Ben A...

    Champion fan relay, odd shutoff issue.

    I should note... I pretty much built this car/engine in covid boredom knowing literally nothing at the start. Then I "finished" and hit the road immediately! So driving from Toronto to New Orleans to LA is a huge and very nerve wracking experience on an untested first build. Im not in a big rush...
  30. Ben A...

    Champion fan relay, odd shutoff issue.

    Hey guys, apologies for my delay Ive been putting in long hours through Texas! This might be a ramble but theres a lot of replies so I might as well... Early this morning I wired in a manual on switch and the hottest the coolant got was 206deg cruising at 2700rpm on the interstate (got cooler...
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