Rear Gear Information - Ford Powerstroke Diesel Forum

 
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post #1 of 7 Old 07-17-2012, 12:34 PM Thread Starter
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Rear Gear Information

Gentlemen/Ladies,
I have a 2006 F350 Super duty 6.0L Dually 4X4. I was under the rear end of it today looking around and spotted the metal tag on the rear gear area. It said 4 - 10 and then below that 4 30. Can someone who has more knowledge than I explain this to me please.

Thank You,


Mike
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post #2 of 7 Old 07-17-2012, 12:58 PM
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Originally Posted by mward3 View Post
Gentlemen/Ladies,
I have a 2006 F350 Super duty 6.0L Dually 4X4. I was under the rear end of it today looking around and spotted the metal tag on the rear gear area. It said 4 - 10 and then below that 4 30. Can someone who has more knowledge than I explain this to me please.

Thank You,


Mike
Were the numbers all factory stamped? I would think you had 4.10's unless you have the Tow Boss package or someone changed them. Check the front diff for a tag, they should be the same ratio.

2006 F350
6.4 banjos
FP spring
Insight CTS
IDP/Looney SCT X3
Studded
Durastroked
S&B,CCV
FICM Repair/PHP 40hp

2008 F250 FX4
DPF-R +
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post #3 of 7 Old 07-17-2012, 01:06 PM Thread Starter
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Yes they were stamped on the tag and yes I do have the Tow Boss package.
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post #4 of 7 Old 07-17-2012, 01:29 PM
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Tow boss=4.30 if i remember correct.

2006 F350
6.4 banjos
FP spring
Insight CTS
IDP/Looney SCT X3
Studded
Durastroked
S&B,CCV
FICM Repair/PHP 40hp

2008 F250 FX4
DPF-R +
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post #5 of 7 Old 07-17-2012, 01:33 PM
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The TowBoss package would have had an 4.30LS. Axle code on the sticker should be 4L.

If you are still running stock 245/75R17 tires, your 60mph rpm should be right at 2,000.

I also have that package, and I like it.
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post #6 of 7 Old 07-17-2012, 01:55 PM Thread Starter
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Thanks for the replies. Only mods are egr delete and blue spring, i tow a 13.5K 5th wheel and have no problem moving it.
Took it for a ride today - at right on 60mph it was dead on 2000.

Thanks again,

Mike

Last edited by mward3; 07-18-2012 at 01:23 PM.
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post #7 of 7 Old 07-17-2012, 04:10 PM
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These things can tow, zero complaints from me as well.

Should you start modifying it, shoot me a PM, I'll let you know what has worked for me. (Tuning got me a lot of fuel economy)
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