Slow Reverse Illumination Rar
Sooo you said orange is the reverse on the metra, then you tap it into the trunk orange. If its in the harness, you won't need orange in the trunk. I've seen the trunk ones i just was wondering if there was something up front, there HAS to be somewhere. What about the illumination wire?
I don't see that pictured anywhere. And i've already bypassed the speed wire so it will still work with that wired and would navigate much better with it (dead reckoning better) does that mean NO ONE here hooks up the speed sensor wire?
School Bus Fleet Magazine Forums AT 545 Low reverse pressure Author Topic Advanced Member USA 293 Posts Posted -: 6:47:41 PM Anybody else having problems with these things? They'll get to where the backup light switch/alarm won't activate.
- They'll get to where the backup light switch/alarm. If the idle speed is even 25 RPM too slow, the reverse switch may not activate as it. School Bus Fleet.
- Car Speed Signal, Illumination, Reverse wires!? I've been looking at all the installs on here and searching the forum, but I don't see anywhere that has identified.
Send em out to the trans shop and more than likely they will come back still not working or will quit working shortly. Advanced Member USA 259 Posts Posted -: 06:20:46 AM does it go into reverse ok? I have seen a bunch of bad switches that are set for to high of a pressure. Reverse typically is over 200psi.
Find a Slow Reverse - Illumination first pressing or reissue. Complete your Slow Reverse collection. Shop Vinyl and CDs.
If it goes in gear ok but no beeper look at the swith its like a slinky! Useless but fun to watch. Advanced Member USA 293 Posts Posted -: 2:15:27 PM I checked all the simple stuff. Happens on more than one bus.
Could be switches,I asked about this and parts man claims they are the right ones from International. I'd try a pressure check on the port itself but don't have a gauge.
On Friday I'll try a few more switches. Top Member USA 948 Posts Posted -: 11:04:22 AM Line pressure is very significantly affected by RPM. If the idle speed is even 25 RPM too slow, the reverse switch may not activate as it should because the pressure is not high enough.
Verify that the idle speed is a minimum of 650 RPM in 'D', I ran ours closer to 700-725. If you want customer service, you NEED an International! Advanced Member USA 259 Posts Posted -: 11:34:14 AM 230 is the minimum reverse pressure spec. Rev switch 416372c1 closes contacts at 60 psi its like a slinky! Useless but fun to watch.
Advanced Member USA 293 Posts Posted -: 7:27:44 PM Went in this morning intending to switch the current new switch (second new one I tried) with a known good one from another bus. First shift had already taken it to trans shop. As far as RPM relation to trans pressure- I had backup signal at 700 RPM when I first pulled it back in shop after it had come back from trans shop but that soon changed and I had to kick it up to 800 at idle to get a signal. After setting idle up and putting into reverse again I couldn't get a signal at 1200 RPM. That's when I backed it out to be sent out (third time). Will post when it comes back from trans shop, thanks for your input. Advanced Member USA 293 Posts Posted -: 2:57:18 PM OK here's the deal, and not being a trans man I'll do my best- seems as though the guy who rebuilt the trans the second time pinched an O-ring upon reassembly, this in turn caused a loss of pressure to the high/reverse drum that was enough to cause the sleeves/bearings on the center section to freeze on the drum.
This loss of pressure also resulted in 0 psi to the backup switch but was not enough to prevent trans operation (for the time being). What I bring back from this experience is that at the outer life of the high/reverse circuit on these 545s the resulting loss of pressure is enough to prevent sufficient pressure to activate the backup switch but not enough to prevent proper operation of trans. I think this because as I say this has happened on at least four busses of mine.
In this case faulty rebuilds could not cure the problem, in other cases rebuilds did remedy the problem. I don't know how accurate this is but I did.see.
the sleeve/bearing on the drum on this trans and it was bad, when this damage happened I can't say but the trans was run for less than 25 miles after the second rebuild- first rebuilt was six months ago. Advanced Member USA 259 Posts Posted -: 6:45:18 PM well actually no drum and its 1st and reverse in combo with 4th that gives you reverse. I would have to say definitly faulty rebuild. For it not to have 60 psi in reverse thats a major internal leak (cut seal). I would say this is a case of auto rebuildwers trying to use turbo 400 parts in a allison trans.
Its like a slinky! Useless but fun to watch. Advanced Member USA 293 Posts Posted -: 6:51:43 PM Hmmm, he showed me a drum. It wasn't a gear. I'll get me a diagram of this trans and check it out myself just to satisfy my curiosity.
Reverse Illumination
Took a course on the workings of this particular trans back in 83 but everything is forgotten of course. It may be broken down in the Motor manual. Edited by - raytobe on 6:56:01 PM Advanced Member USA 259 Posts Posted -: 03:37:04 AM he may of showed you 4th clutch housing. Round about 8'x3' piston and clutches on the inside of it. (what you call a drum and mine may be different)and 3rd clutch plates goes around the outside.
It surely isnt your fault that it failed that early its like a slinky! Useless but fun to watch. Advanced Member USA 293 Posts Posted -: 2:37:40 PM Looked in the manual today and got my memory refreshed somewhat. Although the diagram is not really that clear or inclusive.
The operation really revolves around planetary and sun gears activated by clutch packs. I look forward to gaining further knowledge in the near future. The last re builder apparently wasn't clear on his description of the cause for failure and how the trans operated. Today he said the cut seal was the cause and he also made reference to using synthetic fluid as a prevention measure. First pic is the center support (drum to me yesterday).
Second pic is wear on sleeve he claims is due to seal being cut (at less than 25 miles). Click for full size. URL= /URL URL= /URL image shack really reduces the clarity of the pics, you can't really see the groves on the outside of the sleeve. Edited by - raytobe on 2:45:13 PM Advanced Member USA 259 Posts Posted -: 6:32:05 PM the wear there is to the center support, it is caused by 4th housing dropping and rubbing on it. This is caused by either the rear spacer being improperly selected or improper placment of the thrust bearings. 4th housing sits on the sunshaft and has no contact to the center support. Sun shaft is raised up through that by the planetary pack and its stack up.
Is your trans shop auto builders as well or just heavy duty? I see a lot of the auto guys that dont know the proper procedures and just slap it together the way it came apart. This in no way was caused by not using synthetic fluid.
Reverse Illumination Signs
( morale is 4th dropped and rubbed thats what caused the seal failure.center support cannot move up its bolted and snapringed) sorry if im complicating it? Ive been building these for 20 plus years and happen to enjoy them still.
Best luck its like a slinky! Useless but fun to watch. Advanced Member USA 293 Posts Posted -: 11:26:02 AM thanks for your input. I have grown lazy from the refrain we use now- 'send it out'. Didn't use to be that way, if it broke we had to fix it.
Reverse Illumination Channel Letters
I welcome all tech info/advice. The system we use now for out work is- 'hey, I can fix that for less than him.' Our foreman is not a mechanic and not inclined to waste time thinking about total end cost or ways to reduce costs period.
There's that golf game and more important things to think about you know. New Member 3 Posts Posted -: 9:02:15 PM i have same problem with really bad wear of center support on my at545, i rebuild it with my relative, at first i changed center support, checked oil after short drive, was dirty, we open transmission second time, same thing center support was with same uneven wear. I decided to put bearing between center support and fourth clutch and now when i checked the gears reverse doesn't work i think low oil pressure, because when i accelerate on high rpm it starts beeping and go reverse really hardly. I'm just tired from this transmission, i don't know what should i do to make it work New Member 3 Posts Posted -: 10:14:35 PM i got 1997 freightliner fl 70 with cummins 5.9l 190 hp New Member 3 Posts Posted -: 10:24:30 PM next problem is that it's very slowly shifts on 1st and 4th gears, we rebuild all transmission and changed torque converter but it didn't really help, can anybody tell me what can it possibly be Thanks Advanced Member USA 293 Posts Posted -: 7:28:53 PM Man, time flies. Just saw this and I know for sure I'm getting old.
I can't even remember writing my posts in this thread. Wish I could help you out Mikeshat but I'm not a trans guy. Topic Jump To.