SWEET98SS

iTrader: (8)

So I picked up some used 410 gm gears and am installing them in my 10 bolt. This is my first time installing gears. It looks like I need to shim the pinion a little more.

Here are my drive and coast patterns. I am told that you do not have to worry about the "drive" on used gears. These have 30,000 miles and are out of an astro van.


Also, what should my backlash be set at?

mjs1012

iTrader: (36)

IIRC backlash should be between .005-.009. I just finished up installing new motive 3.73s and it was .008

redbird555

iTrader: (14)

I cant really tell much from the pics. It looks like the gear paint wasnt even touched or that its completely gone. Either way you want to shoot for a nice even pattern with depth about halfway on the tooth. The pattern on the drive side does matter but really on new gears, as the used ones have wear on the drive side so a used pattern can be off. Gm gears like to be run a little tight so I'd shoot for something in the .006 range.

Try to get a better pic and post again but this is an example of a good pattern.

https://ls1tech.com/forums/gears-axl...tern-pics.html

SWEET98SS

iTrader: (8)

Well i got it back together, set the backlash to .007. Its a real pain to set these up when you have to keep taking the bearing off. I made my a split bearing so it would slide off but the bearing wasnt in the best shape. I drove it around, its a little noisy, about the same as the other gears that were in it.

Initial impressions are its not much different but i havent driven much. I can tell that I have to shift faster as it revs faster. I will drive it tomorrow more.

So this install cost me about $185 with purchasing a dial indicator, gears, install kit, one new pinion bearing and oil.

mjs1012

iTrader: (36)

What did you set your pinion nut torque to? Did you use the same crush sleeve after you took the pinion out and reset it?

SWEET98SS

iTrader: (8)

I used a new crush sleeve and just tightened it until it felt like it spun freely with no slop. I drove it alot more today, im impressed on how it holds the rpms now when I shift, requires alot quicker of a shift now. Its actually pretty quiet for my first time ever setting up gears. I mean its not dead quiet, but its not extremely lound. Now to get my speedo corrected, its way off. It said I was doing 90 today, should of only been 65 to 70.

mjs1012

iTrader: (36)

This method might work but its not the correct way to go about doing it. Next time youll need the tool that measures rotating torque (forgot the name), as it needs to be between 15-30 in lbs. doesnt seem like much but it is.

Congrats on your first install though.