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T1N Database Reference Information, Part Numbers, Recalls, TSBs, and etc.


 
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Old 09-24-2018, 09:25 PM   #1
Aqua Puttana
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Default T1N Differential Rear End Gear Ratio

Wondering what Differential Ratio your T1N has? One way to answer that question is to get a Data Card or Factory Build Card which is keyed to your VIN number. The ratio is listed there.

General information about Data Cards is here:

Data Card Datacard Revealed. I'll show mine, you show yours.
https://sprinter-source.com/forum/sh...ad.php?t=25620

Sailquik Roger has been very helpful in providing members the information.

Quote:
Originally Posted by sailquik View Post
Guys/Gals,
In order to "streamline" getting your DataCard for you could you please send me a PM
INCLUDING A VALID EMAIL ADDRESS to return the card to you.
The reason for the email address is that the Sprinter-Source PM software does not like attachments and
I have found no "work around". It's much easier for me to simply email the DataCard back to you.
The "printer" feature on MBSprinterUSA EPC.net easily converts the data to a .PDF so that is not an issue here.
I'm getting a lot of requests, that's fine, I will try to be helpful here.
I'm not real comfortable with posting them to a public forum, I'll let you make that
choice AFTER I send you your DataCard.
I'm also not "collecting" email addresses for any reason. Once I return your
DataCard I delete the email address.
Roger/sailquik
You can crawl under the truck and read the label.
Quote:
Originally Posted by lindenengineering View Post
Label riveted onto the rear axle!
Dennis
Some general T1N differential information.

AC6 = AXLE RATIO 1 = 3.727 (Seems common for NAS aka NAFTA 2500 passenger models.)

??? = AXLE RATIO 1 = 3.92 (Somebody have the Data Card number?)

AR3 = AXLE RATIO 1 = 4.182

A hint for the 3.727 Ratio.

I have noticed that the 3.727 2006 passenger 2500HC (OEM, no DARF mod) 4th gear at 3000 RPM is almost exactly 70 mph by the speedometer. 70 mph in 5th gear is around 2500 RPM. I find that 3000 rpm in 4th sets up a good torque for long grades. Toggling between 4th and 5th gives a decent engine speed for flats and climbs when needed.

Feel free to add any information to this thread.

I'd be interested to know the RPM corresponding speedometer reading (not GPS speed over ground) for the 3.92 and 4.182 differentials.

Tire size doesn't matter. Even though with stock tires the Sprinter speedometer is known to have an approximately 3 mph discrepancy, the drive wheel (Axle 1) ratio remains the same. Tire size will affect speed over ground though (a larger diameter tire will cover more distance per wheel revolution).

vic
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Last edited by Aqua Puttana; 09-26-2018 at 04:17 PM.
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Old 09-24-2018, 10:50 PM   #2
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Default Re: T1N Differential Rear End Gear Ratio

From a 2001 4x4 in the UK: (and a 2nd in Oz)

A71 DIFFERENTIAL LOCK, REAR AXLE
AC4 AXLE RATIO I = 4,857

The "AR3 = AXLE RATIO 1 = 4.182" seems to be an NCV3 code, not T1N

From a 2007 NCV3: AR2 AXLE RATIO I = 3.923
another NCV3: AR6 AXLE RATIO I = 5,100 (gasoline M272)

Brazilian 2010: AR4 AXLE RATIO I = 4.364 (engine OM651)

From a 2016 US Options book:
AR2 = 3.923
AR3 = 4.182
AR4 = 4.364

An Aussie 4x4 NCV3 also had the AR2

--dick (more if i find any will get edited in...)((but i think i'm done... (in)))

(oddly enough, i only have the 3.727 in all of the captured T1N datacards that i have (save 2 4x4s))
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Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))

Last edited by autostaretx; 09-24-2018 at 11:16 PM.
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Old 09-24-2018, 11:27 PM   #3
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Default Re: T1N Differential Rear End Gear Ratio

AC2 - AXLE RATIO I = 4,111

in my 2002 4x4
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Old 09-25-2018, 12:19 AM   #4
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Default Re: T1N Differential Rear End Gear Ratio

Thanks everyone for information so far.

Quote:
Originally Posted by autostaretx View Post
...

(oddly enough, i only have the 3.727 in all of the captured T1N datacards that i have (save 2 4x4s))
I hear you.

I did some Data Card searching and posted what I found. I knew that I recalled other differential ratios, but couldn't nail them down.

vic
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Old 09-25-2018, 02:09 AM   #5
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Default Re: T1N Differential Rear End Gear Ratio

To assist you in the gears/rear/revs/speed question, here's my spreadsheet, with rear end ratio being a cell you can change.
The tire size in the sheet is (are) my OEM 225/70R15, with (iirc) 732 turns per mile. (another cell to tweak)

.xls file zipped so the forum will accept it: gears.zip

--dick
p.s. regarding the "other" rear end us T1N folks used to see, Aussie's 4.111 sure sounds familiar...
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2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
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Old 09-25-2018, 07:32 AM   #6
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Default Re: T1N Differential Rear End Gear Ratio

Quote:
Originally Posted by Aussie 2002 4x4 View Post
AC2 - AXLE RATIO I = 4,111

in my 2002 4x4
Same ratio and code as my UK Spec Rear Wheel Drive

Keith.
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Sprinter reference info site http://diysprinter.co.uk/reference/
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Old 09-25-2018, 08:20 AM   #7
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Default Re: T1N Differential Rear End Gear Ratio

AC6 AXLE RATIO I = 3.727

2005 3500 158" cargo with the ICC (Interstate Commerce Commission) stuff.

I'm close to Vic's shift points descriptions but reckon LT 225/75 R16 tires turn slower,
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Old 09-29-2018, 03:06 AM   #8
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Default Re: T1N Differential Rear End Gear Ratio

Just for reference, to my knowledge the only modules programmed with the Axle ratio are the Instrument Cluster (for certain), and possibly the ABS module (not certain).

In order to change axle ratio on an automatic van, at a minimum the Instrument Cluster must be SCN coded (and possibly the ABS module). As several users have learned changing the ratio without programming results in permanent trans LHM.
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Old 08-03-2019, 09:54 PM   #9
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Default Re: T1N Differential Rear End Gear Ratio

208cdi 2006
AC3 AXLE RATIO I = 4,375

Sorry for the old resurrection, but mine wasn't listed
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Old 01-17-2020, 03:49 PM   #10
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Default Re: T1N Differential Rear End Gear Ratio

2003 Freightliner 2500 158"
According to MB VIN, I have the 3.727 ratio.
@ 75mph GPS I'm at 2,900 rpm, and 79 mph on the speedo.
I suspect tire diameter is the issue.
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