Question about 2000 Dodge Ram 1500 Truck

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How to tell what gear ratio i have in my truck

Im tring to fix or replace my rear axle. how do i figure the gear ratio so i get the right parts?

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No tag on door pillar or door telling you? Or try ( www.decodethis.com )

Posted on Dec 31, 2008

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I have a 98 Ford E150 conv. van need to replace complete rear end need to figure out which one I have and what yr will interchange and if a truck rear end work or only a van


Hello Brenda...you will find some identifying information on the actual real axle casing. Stamped numbers, I.D. tag or you can search your VIN (Vehicle Identification Number) or make, model year and series on the internet to see what options were available for rear end gearing ratio's.

Yes you should stick with a similar or identical rear end to ensure proper mounting bracket alignment and gear ratio choices. Dana Model 60, 70 & 80 Axles are not internally identical.

Looks like the standard differential carrier for the E150 is a 8.8" (*10 bolt). Standard, Includes Spider gears, 31 spline, 7/8" shaft.

* Ten Bolt - The rear end cover plate contains 10 mounting plate bolt holes.

May 05, 2016 | Ford Cars & Trucks

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I have a 1988 Bronco with a drivers side rear axle and bearing problems. How can I find the right sized axle and bearings?


There's a tag on the rear cover. The most popular one on a full sized bronco is an 8.8 ring gear with a 3:55 ratio. However, The 5 lug axles are the same for the F150 and Bronco (not Bronco II) from about 88-96. The gear ratio doesn't matter. The axle bearing is probably in abundant supply in just about any parts store. The axles are plentiful at just about any salvage yard. There really aren't any options to concern yourself with. It's kinda like going to Baskin Robbins 32 flavors of Ice Cream...and they're all vanilla. You can check car-part.com to locate one near you and research the item on your own. I hope I've helped. Please rate my assistance and leave a testimonial.

Dec 30, 2010 | 1988 Ford Bronco

1 Answer

Rear axle just blew out some gears, yes im going to have to replace the gears and rear diff cover, Im not made of money so i need to go as cheap as i can such as a junk yard, and im wondering whats...


since you really don't have that much cash and it takes a lot of experience to rebuild a rear end along with special tools swapping the whole axle is your best bet, just keep whichever parts are the best ie brake shoes drums etc

Aug 23, 2010 | 1999 Chevrolet Silverado 1500

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Is there anything I could do to bring my RPM's down when Im driving in hwy. I have a 96 t100 4x4 stick, stock. At 70mph rpm is at 3300. I changed to manual hubs and that helps a little.


The only way to accomplish that is to change the axle gear ratio. Trucks are generally geared for hauling, towing, plowing, etc, so you have more torque and power at lower speeds. If you change the axle ratio,your low end performance will probably suffer (sluggish acceleration at low speed). Basically, your T100 is not designed for 70mph highway driving.

Mar 23, 2010 | 1998 Toyota T100

1 Answer

Just replaced 98 grand cherokee 5.2 liter front axle its a 3.73... One month later front diff is heating up and humming,I think its going out again..


is it same gear ratio as old one also double check to see what ratio rear one is if someone else replaced one of them before and had wrong ratio

are your tire size the same on front and rear the must be the same on 4 wheel drive

where did you get new axle if u got from junk yard it could be bad

did you fill axle with right weight oil?

Feb 13, 2010 | 2001 Audi A4

2 Answers

Want to change gears in rear end for posi traction in a 98 gmc25000 is this possible?


It is possible, you just have to know what gear ratio you have in your Sierra. I had issues with my son's rear differential and did the Salvage Yard and picked one up for $250.00 with less then 45,000 miles. Remember new cars end up at Salvage Yards also.

Here are the Pro code for the rear ends to your Sierra and you can match one up at a Salvage Yard.
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSI TRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

Open Your glove box and look inside it. Should be a list of codes on the bottom.
Example: GU6 G80 According to that, you'll have a 3.42 posi

Good luck and keep me posted and call around Salvage Yards, there prices will differ from one to the next salvage yard and don't ask them for a posi rear end. The cost will you more, just search all the SUV's and look at the pro codes in the glove box. Hunt, most awd system SUV will have the G80 rear end.

Good luck and keep me posted.

Jan 10, 2010 | 1993 GMC Sierra K1500

1 Answer

Decifering the "build" codes on Toyota Tacoma


I would call the dealer parts dept. they should be able to tell you what you need to know. there may be a difference in gear ratio for each engine/ trans combination. A salvage yard may be able to help you , they should have a computer system showing what rear is compatible. there should be a code on the axle housing itself.

Oct 13, 2009 | 2001 Toyota Tacoma

4 Answers

Rear end (axle)


call jeep and give them last 9 digits of your vin and ask for three things -Differential Type,Gear ratio, and Track lock- They will give you
1) Dana 35 or 44
2) Gear Ratio 3.31 or 3.73
3) Track Lock - yes/no

Jan 11, 2009 | 1998 Jeep Grand Cherokee

1 Answer

Bird Rear-end Size


Hi meduck4,heres what you need brother as I cant see your diff, 3 ways to tell what you have:
#1 The first is the driver's door tag; there will be a one-letter or one-numeral axle code listed there. You can then compare it to the chart below: CODE Rear Axle Ratio Conventional Locking 8 M 2.73 Y Z 3.08 F R 3.45 5 E 3.27 6 W 3.73
#2 The second is the axle tag, attached to the lower lefthand bolt on the rear axle itself. The bottom left line will give you the gear ratio, and the type of rear end (S for limited slip non-locking, and L for locking).

#3 The 7.5" rear axle height is shorter than the width and the shape appears "oval".
The 8.8" rear axle
dimensions are equal and the shape appears "round".

This will tell you what you have my friend,good luck

Nov 13, 2008 | 1985 Ford Thunderbird

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