4.88 Gear Manufacturers?

[OrangeCrush]

Tracy hit it on the head.

You've got to have someone that knows what they are doing. GM gears are way harder than setting up Ford gears for instance.

I don't do trannys and gears.

Now I gotta find someone.


Mark

[twr]

hi Mark, to bad your so far away or i would do them for you. Anyone doing gears has to have a pinion depth gauge, inch pound dial torque wrench, dial indicator, gear paint for checking the pattern and KNOW HOW TO READ THEM, spanner wrenchs in some cases and a few more tools but these are the main ones.

[OrangeCrush]

Originally Posted by twr

hi Mark, to bad your so far away or i would do them for you. Anyone doing gears has to have a pinion depth gauge, inch pound dial torque wrench, dial indicator, gear paint for checking the pattern and KNOW HOW TO READ THEM, spanner wrenchs in some cases and a few more tools but these are the main ones.

Oh, I am well too aware of what is needed. The biggest tool needed is what you mentioned.... "KNOW HOW TO READ THEM"...lol.

My last H2 I had a friend (who is a GM tech) install gears. I went through 5, YES, 5 sets of ring and pinions)

The towing company that tows for my bodyshop couldn't believe how many times I would call stranded on the side of the road because the rearend would lock down.

That was the cheap part.... one of those times when the frt gears locked down, it shattered from front diff.

Hurts just to think about it.

Ended up taking my gears to another friend who is also a GM tech. Did it once and it was fixed.

MAKE SURE THE PERSON KNOWS WHAT HE IS DOING.... an incorrect installation of gears and you may have more than a whine (no pun intended)


Mark

[twr]

hi Mark, my point exactly the the first GM tech shouldn't install gears and the second GM tech knows what he's doing. I have seen a few diff's locked up, some do to gears some carriers { pinion pin} bearing etc. This is also why you should only buy gears from a good company and make sure the guy know's what he's doing so you don't go throught it 2 times or in your case 5 times. THAT SUCKS

[guruerror]

Thanks for the additional info...I'm on Trail Duty's site now.

As for installation...I've had my local dealer to all my work so far. They're kind of a niche dealer, they're all Corvettes, Hummers, and GMC trucks. They did the install for everything in my first post (minus the CIA, plus an oil change) for $1,600...and that included some custom work on the Flowmaster to keep it up under the truck like the stock pipes.

I hate to sidetrack my own post...BUT, after doing some more reading on the forum I find myself torn between 4.88s and 4.56s. I ordered the Superchips Cortex 2950 to reprogram the truck for the tire change and as a prep for the gear change, but I'm thinking that maybe the 4.56s would be a better pick for me.

I'll do some more research and perhaps open another thread once I can better articulate my questions/reasoning.

Thanks, Orange, for the Trail Duty link.

[OrangeCrush]

I can only tell you my experience. I installed 4.56 gears the first time I installed 38's.

Now on this H2 with supercharger also installed, I'm going with 4.88's. I did the 56's last time and to be honest, even with a supercharger, I needed just a hair more. (thus why I'm going with 88's this time)

In either case, you'll see a big difference... I was just telling you from experience.


Mark

[guruerror]

I went with the trailduty.com 4.56...

...more info regarding 'my gears' and my performance/mileage results can be found in my other post.

http://www.elcovaforums.com/forums/s...ad.php?t=38624

Thanks for your feedback!