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post #1 of (permalink) Old 12-25-2002, 10:32 PM Thread Starter
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10 bolts, 6 lug to 5 lug, and 28 to 30 spline

Okay, asking this for Sparty (I'm bored and he's not online, so I'm asking[img]images/graemlins/wink.gif[/img]). He has a 94 Chevy C1500 (yep, 2wd) he's got lifted a little, but the 3.42's in the current rear are barely cutting it with the 31's he has now. This summer he's going 33's if he can, so we're looking at cheap(er) ways of getting him a 3.73 or 4.10 gear ratio.

One thought is just another 10 bolt with the desired ratio already in them, so that saves on the install cost. If it's a 4x4 axle with 6 lugs and 30 splines, can we just swap the axle shafts and drums from his current axle to keep his 5 lug pattern? Ditto for a 12 bolt if we get a 2wd truck 12 bolt to swap with?

If we find a 80's 10 bolt with the right ratios, but 28 spline shafts, we'd be looking at tearing the diff apart and putting in his carrier, gears, and shafts, right?
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post #2 of (permalink) Old 12-26-2002, 01:24 AM
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

No.... actually none of the mix'n'matches you're proposing will work. Essentially no axle shafts from the 87-older trucks will swap into the 88-up trucks.

In addition, 2wd and 4wd's have different track widths and different offset wheels.

There's two ways he can go about it:
1. Shell out for 3.73 or 4.10's for the 10-bolt.
2. Get a 6-lug 14-bolt SF (9.5") from a C2500, front rotors, and a set of 6-lug 2wd wheels.
post #3 of (permalink) Old 12-26-2002, 05:53 AM
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

thanks for the assistance AJM!

yes my initial plan was to just drop 4.10's and a detroit locker into the 10 bolt i have now. AJM has me looking around first, but that still seems like a good idea to me. any input is appreciated

i just got off the phone with Drive Train Specialists....for me to drive there and leave it, they will do install of 4.10's, detroit, bearings, and fluid......for $1067.00.

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post #4 of (permalink) Old 12-26-2002, 09:10 AM Thread Starter
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

no problem Sparty.

u2slow, nice to know you're still lurking man.[img]images/graemlins/cool.gif[/img]

I forgot about the different track widths. Blows that idea all to hell.[img]images/graemlins/tongue.gif[/img] His rear axle is what, 3" narrower than a 4x4 one?

If we did perchance find a 80's 2wd 10 bolt with the right gears in it, is it possible to put his carrier and 30 spline shafts in it? Or just the shafts and a 30 spline Detroit?

Using 6 lug axles is kinda hard because I know Sparty just spent some decent coin on a nice set of 5-lug rims for the 33's.[img]images/graemlins/tongue.gif[/img]

Happen to know if a rumor I heard is true......that the W/T (work truck) package 88+ 2wd's often have deeper gears than regular 2wd's? If so, there seem to be a decent number of those around that we might find a straight bolt in axle.[img]images/graemlins/cool.gif[/img]
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post #5 of (permalink) Old 12-26-2002, 09:13 AM Thread Starter
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

Hmmmm............might wanna talk to pfunk.[img]images/graemlins/tongue.gif[/img]

That's $550 for a Detroit, $200 or so for the 4.10's, and then $300 for the install. Not to bad, an honest price, but if you can get it for what you mentioned earlier, definately better.[img]images/graemlins/tongue.gif[/img]
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post #6 of (permalink) Old 12-26-2002, 11:39 AM
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

Lirking indeed [img]images/graemlins/wink.gif[/img] I guess its been some time since I came through here - the board's revamped, and my posts went back to zero [img]images/graemlins/shocked.gif[/img]

If we did perchance find a 80's 2wd 10 bolt with the right gears in it, is it possible to put his carrier and 30 spline shafts in it? Or just the shafts and a 30 spline Detroit?

The 87-older shafts are 31-3/8" while the 88-up is 31-13/16". They also switched to metric wheel studs too. The gears alone will swap. I would stay with the largest spline available if investing in a Detroit.

Another way to go is if you can find a 454SS rear end. Its a 14-bolt SF with 5-lug pattern. Or you can use the C2500 version (6-lug) and swap in the 454SS axle shafts. The 33-spline axles and 9.5" ring gear are considerably stronger.

Adding more to the soup...
Of all things, a Ford 9" from a late 70's Lincoln Mark V has the correct track width and bolt pattern. Disc brakes too. Can of worms??? [img]images/graemlins/smirk.gif[/img]
post #7 of (permalink) Old 12-26-2002, 10:24 PM Thread Starter
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

That sucks.[img]images/graemlins/tongue.gif[/img]

I thought of the 454SS today. As rare and zealously guarded as they are though, I doubt we'll find a 14SF outta one of those, especially cheap.[img]images/graemlins/tongue.gif[/img]

The 9" is actually a possibility. Michigan is the land of road salt and old folks with old cars. You never know what you will find. Have to see what Sparty thinks.
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post #8 of (permalink) Old 12-26-2002, 11:03 PM
 
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

Shoot, those trucks are all over around here. Most go in camerads for under about 2k...

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post #9 of (permalink) Old 12-29-2002, 06:21 PM
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

ok i have made a decision!

i intend to put 4.10's and a detroit locker in my truck by the end of january-early february. (done by feb 13 anyways, for sure) before i do anything i have found it wise to see what others on this board think before i make a move. i have a good price of $1067 for gears, locker, labor, fluid. this is through a reputable place DTS (Drive Train Specialists).
the other thing i wanted to know is what are the do's and dont's with lockers? like dont accelerate through corners type of thing. also what should i do to break the gears in correctly? thanks again
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post #10 of (permalink) Old 12-29-2002, 10:08 PM Thread Starter
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Re: 10 bolts, 6 lug to 5 lug, and 28 to 30 spline

I know you're supposed to not ream on it for the first 500 miles or so, and change the diff oil after 500 miles. I beleive Willy's knows this. Make a seperate post about it.
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