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Old 06-02-2017, 03:58 PM   #1
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allison transmission differences

I am looking to know more about allison transmissions.

allison B300R ??
Found some info in 3000 series manual
Is there a list that explains the differences between all these transmissions?
is the 3020 part of these?

Thank you

Later J
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Old 06-02-2017, 07:58 PM   #2
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http://powerforce.com/PDFs/Transmissions/DS_PF_B300.pdf

I don't know the difference but it looks a lot like an MD-3060
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Old 06-03-2017, 08:11 AM   #3
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thks Steve,

I was just trying to see how the TCM would be interchangeable between several transmissions.
It seems that the gmc kodiak folks are doing a lot with these 5 to 6 speed conversions.

Later J
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Old 06-03-2017, 10:37 AM   #4
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I talked to one of the shops that is doing the swaps with 1000 & 2000 series swaps/conversions and asked them if they could open up 6th on my 3060. They told me that the 3000 series is quite different and they do not work on them.

Not sure how relevant that is to your quest......
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Old 06-03-2017, 06:14 PM   #5
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i've been watching public surplus for 5 years and finally i think a pair of transmissions just showed up that i'm interested in.

payson az has 2 new in box AT1545P transmissions. i see the P is for PTO, i read somewhere that the 1 is a lock up converter. the only thing that scares me is it says allison for DETROIT DIESEL.

is that the flange? SAE 2 or 3?

i want to know if it will fit a cummins 6bta

https://www.publicsurplus.com/sms/au...ew?auc=1862050

not that my transmission is bad, but to pick up one new in box for just in case seems like a smart move.
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Old 06-03-2017, 06:31 PM   #6
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I didn't find much on the AT1545P. Some say it was the trany for the M35A3, while others say it's usually paired with the Cat 3116 6.6l. On another forum this Allison was not a transmission of choice, but like the 545 would be adequate. I didn't find any information related to the lockup.

I think you'll find the following link interesting;
Allison AT540 AT542 AT543 AT545 AT1542 AT1545 Highwy Transmission Rebuild Manual | eBay

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Old 06-04-2017, 08:05 AM   #7
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the AT1545 was a Military only spec transmission.. I understand it has the same case (SAE 3) bell.. the Bell on the 545 isnt removable. im not sure which converter you would need for lockup. the TC-290 commonly found on the 545 wouldnt work on the 1545.

the advantage of the 1545 over the MT643 in a swap is that would be a direct swap in..

-Christopher
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Old 06-04-2017, 08:28 AM   #8
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If the 1545 is military only I would assume it is geared lower.
Final hear might not even be 1:1
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Old 06-04-2017, 08:38 AM   #9
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Originally Posted by DoubleO7 View Post
If the 1545 is military only I would assume it is geared lower.
Final hear might not even be 1:1
im told its a 1:1. with a lockup converter..

supposedly its a different valve body and input shaft / drum that has the lockup actuator on it.. Ive not seen one in pieces, just talked to a guy at a transmission shop that had one come in on his bench and no one knew what to do with it, as it wasnt the norm.. so he learned about (and rebuilt it).. ironically i think he said it was brought in by a guy doing a skoolie.. (or a conversion in a motorhome)..

-Christopher
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Old 06-04-2017, 02:04 PM   #10
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Quote:
Originally Posted by cadillackid View Post
the AT1545 was a Military only spec transmission.. I understand it has the same case (SAE 3) bell.. the Bell on the 545 isnt removable. im not sure which converter you would need for lockup. the TC-290 commonly found on the 545 wouldnt work on the 1545.

the advantage of the 1545 over the MT643 in a swap is that would be a direct swap in..

-Christopher
so.... is that a yes? i should bid? how would i find out about which TC? is my 6bta an SAE #3?

does that big number 2 stamped on the transmission mean something?

there are 2 there so if someone else is interested, speak up.

thanks
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