Gears

[Ducati18]

What are the best brand gears? What should I do about the front diff gears?

 

[blueflamed03]

hey , Tulsa guy!

here's a good place for gears.

if 4x4, you'll need to do front and rear.
http://www.ronsmachiningservice.net/servlet/the-2451/GM-8.5-OEM-4.10/Detail

 

[BlueTahoe2001]

Not to Hijack-

But, Blueflamed- I have my Motive Gear book here and want to make sure I am looking at the right thing-

Our Trucks are k15's right? Or at least that is how it is listed in the book. Anyway what would be a good ratio for our trucks? What's the stock ratio? I can get anything from a 2.73 to a 5.57 gear.

Also, Auburn lockers...Any good? I have heard good stuff about them, just wanted a second opinion.

 

[blueflamed03]

our is the 8.5/8.6 R&P (ring and penion)
Motive, OEM, etc all make good gears.
Facory gears coiuld be a varierty. Best is to run your VIN and try to decode it.
You may have 3.42, or 3.73.
Gear ratio depends on tire height, and RPM's you desire.

Auburn makes NICE lockers.

 

[BlueTahoe2001]

our is the 8.5/8.6 R&P (ring and penion)
Motive, OEM, etc all make good gears.
Facory gears coiuld be a varierty. Best is to run your VIN and try to decode it.
You may have 3.42, or 3.73.
Gear ratio depends on tire height, and RPM's you desire.

Auburn makes NICE lockers.

Ok,

Best thing is, I am getting Dealer price for the Gears and locker. BTW, Would the tag on the rear end tell me (If there even is one)?

As for the new gear... I eventually (Hopefully by next year) Will be adding a super charger to the mix of modifications to the truck. So, In that case would a 3.90 gear be the way to go? That should keep me light on gas and have some more pickup and more gear.

A 4.10 gear might be out of the question because of the fuel consumption that kind of gearing takes...What ya think?

 

[blueflamed03]

ever plan on getting 20's, and taller tires?
The 4L60e is electronic OD, so IMHO, I have 31" tall tires, 4.10's is perfect!
But if you can go drive on the highway, say set cruise at 55mph, whatever, log what RPM it's at. Then post tire size you have, we can get a close estimate on what gearing you do have.

 

[BlueTahoe2001]

ever plan on getting 20's, and taller tires?
The 4L60e is electronic OD, so IMHO, I have 31" tall tires, 4.10's is perfect!
But if you can go drive on the highway, say set cruise at 55mph, whatever, log what RPM it's at. Then post tire size you have, we can get a close estimate on what gearing you do have.

OK,

Friday, I shall see what my RPM's average at...Also going to look at some wheels / tires as well Friday so I will let ya know then...

BTW, Ever find any thing on those wheels for me?

 

[blueflamed03]

nothing yet, still looking around

 

[BlueTahoe2001]

nothing yet, still looking around

Cool Deal...Also, I have the VIN and Model # of the truck...You said I can find the Ratio from that? Can you explain?

 

[blueflamed03]

well 'might' be able too, but RPM will be better.