posi diff install (for Silverado)

Rob M · 09-26-2013, 10:47 AM

Looking for opinions/advice

Will be home soon from yet another paid "vacation" by Uncle Sam to a pos country and have been considering buying an after market unit for my truck (2000 Silverado 4x4, 6 inch RCX lift kit & 35's, how Original huh? lol) Anyways pretty much convinced on the 3" body lift & elec fan conversion but the diff thing is something Im kinda looking for outside opinions. I know this isnt a 4x4/off road forum but theres alot of other experience on this form... With that said, any input is appreciated. Considering doing it myself at the house but also am just considering bringing it to a shop and having it done. Not sure if Monte C still does this kinda stuff and am a bit leary/hesitant about LC 4x4...

Thanks guys

Rob

slowgreen99 · 09-26-2013, 10:55 AM

Masterbend muffler can probably knock it out for you. Bad Bob on here.

MonteC · 09-26-2013, 01:22 PM

Yeah, we can handle just swapping out the diff.

I like the eaton truetrac diff.

Silver-Dollar · 09-26-2013, 02:52 PM

Throw some 4.10s or 4.56s in it and never feel those 35" tires.

MARTYROBBINS · 09-26-2013, 03:18 PM

Arb air locker FTW

RoadconeTuning · 09-26-2013, 04:47 PM

Lincoln Locker FTW

04ctd · 09-27-2013, 08:01 AM

Shoe Locker?

makes me think of all the funny names for places on the ship:
Gun locker
Fart locker
Rain locker
Snot locker

I vote for a locker if you are gonna USE it 4x4. FWIW, I would put the locker in the front, because all your weight is on those tires.

uselss comment: a Posi in the rear will make it slide around sideways in the rain. an open diff just does a one wheel peal in the rain, not very dramatic, but your corn locker don't get all puckered up when the back of your truck swings into the other lane of traffic.

Rob M · 09-27-2013, 09:49 AM

Quote:

Originally Posted by 04ctd

...I vote for a locker if you are gonna USE it 4x4. FWIW, I would put the locker in the front, because all your weight is on those tires.

uselss comment: a Posi in the rear will make it slide around sideways in the rain. an open diff just does a one wheel peal in the rain, not very dramatic, but your corn locker don't get all puckered up when the back of your truck swings into the other lane of traffic.

04ctd, very true! I am by No means an agressive driver or real lead foot. But You're right and its something to think about as mud grapplers prob arent the best tire for rain water on asphalt. To be honest, No I have never taken her off road, atleast in the 6 months I was home with the truck with the lift kit. Idk why but I just kinda want a posi No-one wheel peel rear end. The cars spoiled me I guess...

Silver-Dollar Damn it! I was hoping to try and ignore the idea of throwing 4.10s in

True, and You're also right, 4.10s would be perfect for that setup... Not sure if Monte C would have the time to do all that or what it would run $$$ wise.

I appreciate all the in put everyone is offering though, definitely food for thought!

BigdaddyDupree · 09-27-2013, 12:40 PM

I wouldn't waste time swapping in 4.10s in the front and rear, go 4.56 and don't look back.

bwelch · 09-27-2013, 01:09 PM

I hear Griffith Transmissions does good work!

Rob M · 09-27-2013, 01:15 PM

Quote:

Originally Posted by bwelch

I hear Griffith Transmissions does good work!

lol, Rob's a great guy, no doubt! Built my 700R4 in for my RS (if I could only figure out my lock-up ughhhh) Extremely knowledgeable and went into depth with What he was going to use to replace stock internals and Why he preferred to use/replace certain parts. Top notch! I just don't know what his work load will be like in Nov. and still kicking around ideas at this point, but the different opinions are getting me thinking for sure.

The 4.56's kinda scare me a bit. Idk I do go up to NC and sometimes w/ the truck so 4.56s w/ 26 gal tank of 89 or 93 would add $$$ up...by the math the 4.10s would make much more sense...at least what im thinking at the moment

oldskoolstang · 09-28-2013, 09:16 AM

I would go with 4.56's over the 4.10s. Changing gears on 2 axles does get a bit expensve, though..... If it were mine I would buy the Eaton Truetrac (formerly Detroit Truetrac) or one of Auburns higher end units for the rear. If you don't plan on off-roading the truck just leave the stock front diff in it. You do not want a locker in the front of a daily driver truck.

Rob M · 09-29-2013, 02:06 AM

Damn, now 4.56's are weighing heavy in my mind...looks like theres only (roughly) a 180-240 RPM difference running highway speeds of 60-80 mph...(between the 4.11's & 4.56's)

BigdaddyDupree · 09-29-2013, 10:11 AM

4.10 isn't worth the swap. 4.56 with 35s will be good. Few local guys have ran 4.88 with 35s knowing that eventually they would go bigger with tires.

Rob M · 10-02-2013, 10:56 PM

Recomendations considered! So I now know 4.56s are whats goin in. Any recommended shops? Contacted 2 SC shops but didn't know if theres any local places(obviously workmanship & quality are Paramount)...Any comments on that "4x4 place in the low country" (hint hint)?

AverageJoe · 10-03-2013, 06:02 AM

Gearmesh?

04ctd · 10-03-2013, 10:29 AM

nathan, I was talking about an air locker in the front, only engage when needed.

and leave the rear open wheel, so it don't do donuts in the skreet.

would that balance out the cost?

Rob M · 10-04-2013, 09:38 AM

Quote:

Originally Posted by AverageJoe

Gearmesh?

LC 4x4

Not aware of Gearmesh, any info on them? I also know of a place on Cross Country road that I believe does axle/diff/drive line work...anybody know anything or where Im talking about...or is that place Gearmesh?

oldskoolstang · 10-04-2013, 10:05 AM

Quote:

Originally Posted by 04ctd

nathan, I was talking about an air locker in the front, only engage when needed.

and leave the rear open wheel, so it don't do donuts in the skreet.

would that balance out the cost?

An air locker would be great....I had one in the front of my Tacoma and a TRD rear locker....It was impressive what I could go thru with small tires....

If he plans to try any off-roading, that peg-leg rear is going to suck. I've never had any issues driving with the rear locked/welded/a spool......it just takes some caution in wet/slippery conditions.

ElecTech · 10-04-2013, 11:54 AM

Quote:

Originally Posted by Rob M

LC 4x4

Not aware of Gearmesh, any info on them? I also know of a place on Cross Country road that I believe does axle/diff/drive line work...anybody know anything or where Im talking about...or is that place Gearmesh?

Gearmesh is not a place.........he's a man!

09-26-2013, 10:47 AM	#1
Rob M Senior Member Join Date: Oct 2011 Location: Goose Creek Posts: 121	posi diff install (for Silverado) Looking for opinions/advice Will be home soon from yet another paid "vacation" by Uncle Sam to a pos country and have been considering buying an after market unit for my truck (2000 Silverado 4x4, 6 inch RCX lift kit & 35's, how Original huh? lol) Anyways pretty much convinced on the 3" body lift & elec fan conversion but the diff thing is something Im kinda looking for outside opinions. I know this isnt a 4x4/off road forum but theres alot of other experience on this form... With that said, any input is appreciated. Considering doing it myself at the house but also am just considering bringing it to a shop and having it done. Not sure if Monte C still does this kinda stuff and am a bit leary/hesitant about LC 4x4... Thanks guys Rob __________________ 2000 Silverado 4x4 Off the beaten path(work horse- Banks CAI, TR55's, gears, tru-trac, magnaflow & tune) 2002 Z28 Around the corner(bolt-ons & tune w/the creature comforts) 1991 RS Skraight down the road (money pit...SBC blah blah blah)

09-26-2013, 10:55 AM	#2
slowgreen99 Senior Member Join Date: Jan 2008 Location: Summerville Posts: 7,740	Masterbend muffler can probably knock it out for you. Bad Bob on here. __________________ M.R.E. Bad Bob Motorsports

09-26-2013, 01:22 PM	#3
MonteC Senior Member Join Date: Oct 2009 Location: Summerville Posts: 4,431	Yeah, we can handle just swapping out the diff. I like the eaton truetrac diff. __________________ Griffin Transmission -Home of the most badassest Monte Carlo- Cell: 843-276-0554 Shop: 843-793-4607 04 RSX 06 Ridgeline 86 Monte Carlo

09-26-2013, 02:52 PM	#4
Silver-Dollar Senior Member Join Date: Jun 2008 Location: Summerville Posts: 1,019	Throw some 4.10s or 4.56s in it and never feel those 35" tires. __________________ 2011 Tundra Crewmax Platinum Last edited by Silver-Dollar; 09-26-2013 at 03:31 PM.

09-26-2013, 04:47 PM	#6
RoadconeTuning Senior Member Join Date: Jun 2008 Location: Upstate, SC Posts: 2,684	Lincoln Locker FTW __________________ FIRSBIRZ

09-26-2013, 03:18 PM	#5
MARTYROBBINS Senior Member Join Date: Nov 2011 Location: NORTH CHARLESTON Posts: 593	Arb air locker FTW

09-27-2013, 08:01 AM	#7
04ctd Senior Member Join Date: Aug 2009 Location: Ladson SC Posts: 4,388	Shoe Locker? makes me think of all the funny names for places on the ship: Gun locker Fart locker Rain locker Snot locker I vote for a locker if you are gonna USE it 4x4. FWIW, I would put the locker in the front, because all your weight is on those tires. uselss comment: a Posi in the rear will make it slide around sideways in the rain. an open diff just does a one wheel peal in the rain, not very dramatic, but your corn locker don't get all puckered up when the back of your truck swings into the other lane of traffic. __________________ 1 Timothy 3:16 16 And without controversy great is the mystery of godliness: God was manifested in the flesh, Justified in the Spirit, Seen by angels, Preached among the Gentiles, Believed on in the world, Received up in glory.

09-27-2013, 12:40 PM	#9
BigdaddyDupree Senior Member Join Date: Jul 2008 Location: MACEDONIA Posts: 4,967	I wouldn't waste time swapping in 4.10s in the front and rear, go 4.56 and don't look back. __________________ . What you wanna do?

09-27-2013, 01:09 PM	#10
bwelch Senior Member Join Date: Aug 2009 Posts: 3,774	I hear Griffith Transmissions does good work! __________________

09-28-2013, 09:16 AM	#12
oldskoolstang Senior Member Join Date: Apr 2012 Location: Guyton, GA Posts: 1,412	I would go with 4.56's over the 4.10s. Changing gears on 2 axles does get a bit expensve, though..... If it were mine I would buy the Eaton Truetrac (formerly Detroit Truetrac) or one of Auburns higher end units for the rear. If you don't plan on off-roading the truck just leave the stock front diff in it. You do not want a locker in the front of a daily driver truck. __________________ Working on junk....

09-29-2013, 02:06 AM	#13
Rob M Senior Member Join Date: Oct 2011 Location: Goose Creek Posts: 121	Damn, now 4.56's are weighing heavy in my mind...looks like theres only (roughly) a 180-240 RPM difference running highway speeds of 60-80 mph...(between the 4.11's & 4.56's) __________________ 2000 Silverado 4x4 Off the beaten path(work horse- Banks CAI, TR55's, gears, tru-trac, magnaflow & tune) 2002 Z28 Around the corner(bolt-ons & tune w/the creature comforts) 1991 RS Skraight down the road (money pit...SBC blah blah blah) Last edited by Rob M; 09-29-2013 at 03:18 AM. Reason: clarification

09-29-2013, 10:11 AM	#14
BigdaddyDupree Senior Member Join Date: Jul 2008 Location: MACEDONIA Posts: 4,967	4.10 isn't worth the swap. 4.56 with 35s will be good. Few local guys have ran 4.88 with 35s knowing that eventually they would go bigger with tires. __________________ . What you wanna do?

10-02-2013, 10:56 PM	#15
Rob M Senior Member Join Date: Oct 2011 Location: Goose Creek Posts: 121	Recomendations considered! So I now know 4.56s are whats goin in. Any recommended shops? Contacted 2 SC shops but didn't know if theres any local places(obviously workmanship & quality are Paramount)...Any comments on that "4x4 place in the low country" (hint hint)? __________________ 2000 Silverado 4x4 Off the beaten path(work horse- Banks CAI, TR55's, gears, tru-trac, magnaflow & tune) 2002 Z28 Around the corner(bolt-ons & tune w/the creature comforts) 1991 RS Skraight down the road (money pit...SBC blah blah blah)

10-03-2013, 10:29 AM	#17
04ctd Senior Member Join Date: Aug 2009 Location: Ladson SC Posts: 4,388	nathan, I was talking about an air locker in the front, only engage when needed. and leave the rear open wheel, so it don't do donuts in the skreet. would that balance out the cost? __________________ 1 Timothy 3:16 16 And without controversy great is the mystery of godliness: God was manifested in the flesh, Justified in the Spirit, Seen by angels, Preached among the Gentiles, Believed on in the world, Received up in glory.