The Truth About Cars » limited slip http://www.thetruthaboutcars.com The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. Sun, 14 Sep 2014 15:36:15 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.2 The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. The Truth About Cars no The Truth About Cars editors@ttac.com editors@ttac.com (The Truth About Cars) 2006-2009 The Truth About Cars The Truth About Cars is dedicated to providing candid, unbiased automobile reviews and the latest in auto industry news. The Truth About Cars » limited slip http://www.thetruthaboutcars.com/wp-content/themes/ttac-theme/images/logo.gif http://www.thetruthaboutcars.com Piston Slap: The Express’ New Mission? http://www.thetruthaboutcars.com/2014/07/piston-slap-2/ http://www.thetruthaboutcars.com/2014/07/piston-slap-2/#comments Tue, 15 Jul 2014 12:12:47 +0000 http://www.thetruthaboutcars.com/?p=866114 TTAC commentator Celebrity 208 writes: Sajeev, I have been sitting on this draft message for a couple weeks now and I just saw your call for questions so here you go. I just bought a ’05 (Chevrolet) Express 3500 12 Passenger Van with 185kmi. It was owned by a Catholic Mission College where they maintained […]

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(photo courtesy: http://www.truckinweb.com/features/1304tr_2006_chevy_express_3500/)

TTAC commentator Celebrity 208 writes:

Sajeev,

I have been sitting on this draft message for a couple weeks now and I just saw your call for questions so here you go. I just bought a ’05 (Chevrolet) Express 3500 12 Passenger Van with 185kmi. It was owned by a Catholic Mission College where they maintained it as part of their van fleet and the maint. history is pretty clean. It was a good deal even if I have to do something dramatic like replace the transmission.

I’m going to use it for towing a boat (w/ trailer it’s 6500+lbs and the runs are ~15mi round trip), delivering kegs to Pamela Elsinore’s birthday party (“at the bottom of the big hill”), hauling visiting family and friends around when visiting (I live in DC which is a vacation destination for some weird reason), and likely Christmas road trips back to Cleveland because my mother goes hog wild with large Little Tikes stuff.

I have seen some of the B&B suggest that renting would be the best solution for these needs but, rental trucks/vans 1) don’t have the towing capacity, 2) usually explicitly forbid towing, 3) aren’t fitted with hitches & 4) are not always available on a whim/at my convenience.

To be sure I don’t use it a lot and hence that’s why I bought one that is 9yrs old and hi mileage. If I wanted new then renting might have met the bill for everything minus towing. At this point you should be laughing. Don’t. This is a step up for me as it is replacing my rusty ’88 G30 Sport van which had 78kmi, or 178kmi, or278kmi, or… (No 100,000 mile digit in the odometer). The ’88 G30 was a beater. It towed ok but it looked like crap and couldn’t be used as a backup daily driver b/c there’s no place to put two+ car seats whereas the ’05 does. The new one has the LQ4 6.0L v8 and the 4L80e trans. So, to my questions:

  1. When I finally get it home what service do you suggest I perform (oil change, trans fluid change etc., timing chain replacement, shocks, 3+ cans of sea foam, etc.)?
  2. What are your and the B&B’s opinions on towing and loaded and unloaded ride performance improvements such as: rear sway bar [this makes sense to me and it's on my to-do list], Roadmaster Active Suspension [this product seems like a gimmick], air suspension kits [I understand how these would increase my load capacity but unless I remove a leaf spring I can't see an air kit improving my unloaded ride quality and allowing me to raise or lower the rear end i.e. adjust the spring rate]?
  3. What are your an the B&B’s opinions on slippery ramp performance improvements such as replacing the open diff with a locker or limited slip [what type? ARB Air, OX Mech, Limited Slip, eLocker, etc.]?

I’m a GM guy but props to the Panther love and props to the site. You guys kick ass. You’re a multiple times a day refresh for me. You keep it up and I’ll keep clicking on some of the ads.

Thanks,

Celebrity208
(Note: I’m not really a narcissist; a Celebrity 208 cc was my first boat.)

Sajeev answers:

Thanks for the kind words, I always admire and appreciate the diverse backgrounds, attitudes, styles, etc of our Best and Brightest.  It’s been the cornerstone of this site’s longevity for more years than I can remember. No doubt, your new van is light years ahead of the old G30, and having a two-time Chevy vanner such as yourself amongst our ranks…well, it’s an honor.

Definitely someone like you should never rent a van, this is the perfect spare vehicle for your lifestyle.

Question 1: Changing all fluids (and the usual worn rubber belts, hoses, vacuum lines, tires, etc) is a great idea, even if we’ve spilled a ton of digital ink over the utility of high mileage ATF service in any transmission.  If the fluid is fresh and the transmission shifts fine, don’t bother changing.  Even if it has a factory tranny cooler, consider putting the biggest aftermarket cooler instead: certainly not a pleasant task, but it’ll be worth it.

Question 2: That Roadmaster kit always intrigued me, just never enough to buy and try.  Definitely get a rear swaybar if that’s an easy swap using junkyard bits from another GM product.  But honestly, all you need are fresh shocks of the high performance variety to get an amazing bang for the buck.  Oh, and replace whatever else in the suspension is worn out after all those miles.  Your eyeballs and basic tools are your guide.

Question 3: There are superior limited slip differentials from the aftermarket, but they are brutally difficult (or expensive) to install.  Why go through all that when–with a little researching–I betcha there’s a complete GM axle assembly in the junkyard with fewer miles and a posi that you can swap in an afternoon?  That said, I couldn’t find a suitable swap candidate, but what the hell do I know?  I’m a Lincoln-Mercury Fanboi.

Perhaps a suitable axle lies in a nearby junkyard, complete with a rear swaybar?  And perhaps addressing the normal wear items and switching to premium shocks will make this van cool enough for even the most jaded reader ’round these parts.

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you’re in a hurry…but be realistic, and use your make/model specific forums instead of TTAC for more timely advice.

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Piston Slap: It Ain’t Easy Being on the Front Left! http://www.thetruthaboutcars.com/2011/11/piston-slap-it-aint-easy-being-on-the-front-left/ http://www.thetruthaboutcars.com/2011/11/piston-slap-it-aint-easy-being-on-the-front-left/#comments Mon, 21 Nov 2011 15:49:02 +0000 http://www.thetruthaboutcars.com/?p=419196 Matt writes: Hello, I own an 06′ Hyundai Elantra GLS hatchback and tire wear on the front left tire has been much worse than the other three, despite rotating the tires. The outside of the front left tire is worn down so that it is smooth and now I can see a secondary layer of rubber being exposed. […]

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Matt writes:

Hello,

I own an 06′ Hyundai Elantra GLS hatchback and tire wear on the front left tire has been much worse than the other three, despite rotating the tires. The outside of the front left tire is worn down so that it is smooth and now I can see a secondary layer of rubber being exposed. At first I thought maybe there was something wrong with the alignment but I took it to three places, one wanted to charge me a $90 “diagnostic” fee so I walked and the other two couldn’t find anything wrong. One place mentioned that since I had directional tires I couldn’t really get a proper rotation and thats probably what’s causing the wear.

My best guess is between the directional design of the tire tread and the nature of my driving it has caused extreme wear on the outside of my front left tire. The other three tires look fine and seem like I could get at least another year out of them. Anyway, my question is should I just replace the front left with an inexpensive replacement and get the remaining life out of the other three or should I just replace all four with an asymetric set? Factors to consider are that I live in the Northeast so I do get snow but it is not a requirement that I be out on the roads when it is falling so snow tires are not important, just a decent set of all seasons. Also I am a student right now so the cheaper option is more appealing to me but not if it is a minimal one. I have about 35k on the tires right now and they are General Altimax HP’s.

Sajeev Answers

It has nothing to do with the tread pattern of your tires. Damn son, you don’t need to pass everyone around EVERY corner!

I’m serious! But it’s all good. Before balancing things out with proper rear anti-roll bars, my rear-wheel drive cars normally had more wear on the front than the rear. It magnified my desire to push my vehicles hard, but not hard enough to induce oversteer and raise the ire of my neighbors…and the local law enforcement. So perhaps I shouldn’t cast stones from within my glass house.

Front wheel drive vehicles are prone to extra front tire wear because those doughnuts have to both accelerate and steer the vehicle. It’ll abnormally wear out the best of rubber. Combined with your obvious lead foot and the Hyundai’s lack of a limited slip differential, the left front wheel takes more than its fair share of tire wear.

What to do? I would recommend more handbrake turns or lift-off oversteer, but that’s pretty terrible advice for a hoon like yourself. The short-term answer is to get one tire to replace the worn out one, as this isn’t an AWD vehicle that demands equal tire circumferences. That’s the easy part.

The hard part? Getting you to chill out when you’re behind the wheel.

Send your queries to sajeev@thetruthaboutcars.com . Spare no details and ask for a speedy resolution if you’re in a hurry.

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