LT E5
Central, CT
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I have a 1999 Dodge Durango Magnum V8 5.9 L engine. I found a towing guide that states it could tow 7400 lbs with a "rear axle ratio of 3.92" Where do I find information on what my axle ratio is? I looked in the owners manual and couldn't find the answer and also on the door sticker. Thanks in advance.
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1995brave
San Antonio, TX
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Joined: 01/24/2006
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Check this link.
Dodge axle
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BenK
SF BayArea
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Joined: 04/18/2002
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Unless you are the original owner, the previous owner(s) may have changed out the
gear set (just look up on these forums and you'll find many doing that)
Best to tape a length of string on the drive shaft. Mark a datum. I like
straight down.
Roll the vehicle on tire rev using the valve stem as a datum
Count the full number of turns and then the fraction of a turn
That is the diff ratio and makes no matter what tire size (under sized or
over sized), lifted, etc.
Remove the string.
-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...
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closurdo
Michigan
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LT E5 wrote:I have a 1999 Dodge Durango Magnum V8 5.9 L engine. I found a towing guide that states it could tow 7400 lbs with a "rear axle ratio of 3.92" Where do I find information on what my axle ratio is? I looked in the owners manual and couldn't find the answer and also on the door sticker. Thanks in advance.
Open the hood and look up, sticker should be stuck to the drivers side.
2003 Silverado 2500hd Duramax
1998 Sunnybrook 26cks
Equal-i-zer Hitch
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stripit
Casa Grande, AZ
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Joined: 02/24/2004
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LT E5 wrote:I have a 1999 Dodge Durango Magnum V8 5.9 L engine. I found a towing guide that states it could tow 7400 lbs with a "rear axle ratio of 3.92" Where do I find information on what my axle ratio is? I looked in the owners manual and couldn't find the answer and also on the door sticker. Thanks in advance.
I had a 5.9 in my 1999 Durango and it pulled great, and I did have the 3.9 gear. Hope yours does too.
Stacey Frank
'04 Mobile Suites 36 TK3 #1341
'99 Int'l 4700 Lo Pro MDT
'08 Lexus 400H
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dodge guy
Bartlett IL
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Joined: 03/23/2004
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Probably a 3.55! the 3.90 was usually a special order. very few came with it from the factory. look inside the glove box door. should be a sticker with all the info. you want there.
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ib516
Up here!
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dodge guy wrote:Probably a 3.55! the 3.90 was usually a special order. very few came with it from the factory. look inside the glove box door. should be a sticker with all the info. you want there.
What he said.^^
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2007 Dodge 3500 SRW Megacab, 4x4, 5.9L Cummins, 3.73, 48RE auto
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MM49
Brighton, MI, USA
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Joined: 12/28/2004
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There is a tag under one of the diff cover bolts. It will have the ratio stamped on it.
MM49
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BenK
SF BayArea
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Wonder if anyone ever read any of these threads on folks changing out their
OEM diff ratio?
Especially if the OP bought their TV used...all of the labels only tell what it
left the factory with...not what it has if the previous owner(s) changed it out
Guess the OP 'might' get a surprise when his mechanic opens and takes
out the one in there to find it is already what the OP wants...or if
the mechanic isn't that honorable...swaps it out anyway to save the
old or even the new set to resell...
Changing out to 4:10 gears
My suburban 342 change to 373 or 410???
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LT E5
Central, CT
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Joined: 12/15/2005
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Thanks for all of replys. I'll check these spot tommorow and to be safe have my mechanic look at it to confirm.
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