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10-01-2015, 01:10 PM
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#1
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Mini-Skoolie
Join Date: Aug 2015
Posts: 29
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Fluids Questions (More Noob Questions)
I have a 91 ford B700 6.6 diesel.
Today the local "Advance Auto" part store is starting a half off of all fluids sale (they are re-locating to a different store). I was curious as to what kind of oil I should buy. I figured since fluids would be half off I would run there and buy a few gallons of trans/oil/wiper/coolant/power steering/brake fluids.
I have looked through all the papers I received when I purchased the bus and I cannot find anything regarding it.
For some reason I want to say 15w-40, but I wanted to come here and ask the more knowledgeable.
TLDR:
I need to get an oil change, what kind of oil should I get?
Also what kind of tranny fluid should I get (I have the Allison AT545 4-speed)? (I have looked on dipstick and it doesn't say which kind it takes)
Also should I get dot 3 or dot 4 break fluid?
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10-01-2015, 01:24 PM
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#2
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
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15w40 oil. In whatever flavor you like. I prefer shell rotella (everybody will have a different choice, some more opinionated then others). I doubt you'll find any use out of synthetic, but if you plan on driving tens of thousands of miles, and if it's cheap, then a synthetic will be better.
Your atf in an at545 will be just regular dexIII/mercon. Anything that meets Allison C4 specs will work. Once again, you can try synthetic, but if you're not traveling a lot it loses it's benefits.
DOT 3 and 4 are both compatible. Dot 4 has a higher boiling point, so if they cost the same, go with 4.
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10-01-2015, 01:29 PM
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#3
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Bus Crazy
Join Date: Apr 2013
Location: Colorado
Posts: 2,356
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
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i think you are on the mark for oil.
here is the link for allsion tran fluids.....
On-Highway Fluids
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10-01-2015, 01:30 PM
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#4
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Mini-Skoolie
Join Date: Aug 2015
Posts: 29
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Quote:
Originally Posted by booyah45828
15w40 oil. In whatever flavor you like. I prefer shell rotella (everybody will have a different choice, some more opinionated then others). I doubt you'll find any use out of synthetic, but if you plan on driving tens of thousands of miles, and if it's cheap, then a synthetic will be better.
Your atf in an at545 will be just regular dexiii/mercon. Anything that meets allison c4 specs will work. Once again, you can try synthetic, but if you're not traveling a lot it loses it's benefits.
Dot 3 and 4 are both compatible. Dot 4 has a higher boiling point, so if they cost the same, go with 4.
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Thank you!
Quote:
Originally Posted by turf
i think you are on the mark for oil.
here is the link for allsion tran fluids.....
On-Highway Fluids
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So anything on that list would be idea for me right?
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10-01-2015, 02:15 PM
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#5
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Bus Nut
Join Date: Sep 2015
Posts: 404
Year: 1992
Coachwork: Bluebird Mini-Bird 24'
Chassis: Chevy P30
Engine: Chevy 6.2L Diesel
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15W-40 is almost every case I've ever heard of what you want to use for diesel engines.
Personally, I like to use about 20-25% Lucas Oil Stabilizer to every oil change for maximized engine life. Granted, it's a 3.0L gasoline engine, but my Ford Ranger has about a quarter of a million miles on it, and from the way it sounds, it probably has another quarter million left in the engine before I will NEED to do a rebuild.
Considering the sale that Advanced Auto is doing, I would also buy some other Lucas branded additives, like their fuel-treatment/upper cylinder lubricant, maybe even their brake fluid additive as well. Some Marvel Mystery Oil is also good for cleaning out the top of the engine if you add it to your fuel, but I don't like to use that stuff unless I am planning a major cleaning immediately after using it.
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10-01-2015, 07:45 PM
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#6
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Bus Crazy
Join Date: Sep 2013
Location: Vacaville, Ca
Posts: 1,634
Year: 1988
Coachwork: Crown / Pusher
Engine: 8.3 Cummins
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As far as synthetics go this is my experience, I had 6 cummuter vans that I transported people to work and back & there are many other coworkers that run their own vans.I had at one time 6 vans 2 where brand new when I bought them & I changed all fluids to Amsoil. every single van that I owned and my coworkers had to have the transmissions replaced between 1000000 to 1200000 miles. every one. the 2 new vans I had one went 4000000 miles before it needed a trans.the other one which I sold but still is drive is over 6000000 miles. fluids are changed every 1000000 miles. So needless to say I put Amsoil in everything
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10-01-2015, 09:20 PM
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#7
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Bus Geek
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
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The new gen Allisons require the long life Transynd tranny fluid to keep up the warranty. And from the reports I've read...it is worth the money. Just keep the heat below 250. Lower temps = longer fluid life.
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10-01-2015, 09:59 PM
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#8
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Bus Crazy
Join Date: Apr 2013
Location: Colorado
Posts: 2,356
Year: 1993
Coachwork: bluebird
Engine: 5.9 Cummins, Allison AT1545
Rated Cap: 2
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Quote:
Originally Posted by Booyah45828
Your atf in an at545 will be just regular dexIII/mercon. Anything that meets Allison C4 specs will work. Once again, you can try synthetic, but if you're not traveling a lot it loses it's benefits.
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that link above was to the approved synthetics.......Booyah is right with what he also says.
as well as, my 1993 AT545 dipstick is stamped "use dexron"
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10-03-2015, 10:02 AM
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#9
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Mini-Skoolie
Join Date: Aug 2015
Posts: 29
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Thank you everyone. I really appreciate all the help.
Forgot to mention, if anyone is interested in the half off sale it is at Advance Auto (north store) in Marion IN, 46952.
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10-03-2015, 11:49 AM
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#10
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Bus Crazy
Join Date: Sep 2013
Location: Vacaville, Ca
Posts: 1,634
Year: 1988
Coachwork: Crown / Pusher
Engine: 8.3 Cummins
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10-03-2015, 11:57 AM
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#11
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Moderator
Join Date: Feb 2007
Location: NUNYA
Posts: 4,236
Year: 1995
Coachwork: Thomas
Chassis: 3800
Engine: DT408, AT545
Rated Cap: 23 500 gvw
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Quote:
Originally Posted by Stu & Filo. T
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I was going to say I thought you stretching the truth a wee bit.
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10-03-2015, 04:35 PM
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#12
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Bus Crazy
Join Date: Sep 2013
Location: Vacaville, Ca
Posts: 1,634
Year: 1988
Coachwork: Crown / Pusher
Engine: 8.3 Cummins
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Quote:
Originally Posted by crazycal
I was going to say I thought you stretching the truth a wee bit.
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LOL might have to step up from 2.25 too 2.50 on my readers
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10-05-2015, 10:37 AM
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#13
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
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Quote:
Originally Posted by Tango
The new gen Allisons require the long life Transynd tranny fluid to keep up the warranty. And from the reports I've read...it is worth the money. Just keep the heat below 250. Lower temps = longer fluid life.
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Absolutley correct. The new fluids for the allisons (tes295) is probably the best atf on the market today. But at 18 bucks a gallon for dex/merc vs. 40 bucks per gallon for something that is tes295 certified I don't find the value there on a short mile vehicle.
Synthetics are great, but not when the vehicles sits more often then it moves, which is what most skoolies are. In that case, I think it's money better left in your pocket.
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10-05-2015, 04:23 PM
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#14
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Bus Geek
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
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Maybe the single most overlooked aspect of tranny fluids is...temperature. I hear people talking about their fluid routinely hitting 300 climbing a hill which they apparently consider OK. Take a look at the chart below to get an idea of just how important maintaining proper cooling of transmission fluid really is.
Transmission temperature/failure chart.
http://www.txchange.com/heatchrt.htm
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10-06-2015, 08:35 AM
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#15
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
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Your link doesn't work.
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10-06-2015, 08:36 AM
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#16
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Bus Geek
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
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Hmmm...just came up for me (?)
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10-06-2015, 09:15 AM
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#17
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Bus Nut
Join Date: Oct 2011
Location: Snowflake, Arizona
Posts: 343
Year: 1996
Coachwork: Blue Bird
Chassis: All American Rear Engine
Engine: C-8.3-300 Cummins MD3060
Rated Cap: 40 Prisoners
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Which browser are you using? Won't come up for me either I'm using Chrome.
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10-06-2015, 12:03 PM
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#18
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Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,678
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
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It finally did for me. Kept coming up as an inoperative link so I assumed you goofed on it. Who knows. I'm using IE
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10-06-2015, 12:15 PM
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#19
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Moderator
Join Date: Feb 2007
Location: NUNYA
Posts: 4,236
Year: 1995
Coachwork: Thomas
Chassis: 3800
Engine: DT408, AT545
Rated Cap: 23 500 gvw
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The link worked for me using firefox but I added another link.
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