About to cut a deal on a 2005 4X4 dually automatic. Window sticker does not say it is limited slip, salesman says it is. Rear differential cover does not have a tag on it stating limited slip.
The Rockwells used to have a tag on them; how do you know if this is limited slip?
Thanks-

 

On the summary sheet it should have the codes "DRX Axle Rear AAL 11.5" and "DSA Axle Anti Spin diff". Ask for a print out of the VIP summary sheet. Or you can look at the label in the glove compartment for equipment codes.

 

Checked glove box for codes and it says - DRX 11.50 Dual Wheels Rear
That's all it says - not sure now - is it or isn't it limited slip?
Shouldn't ALL 4X4's have limited slip?
Thanks again-

 

No, not all 4x4's have LSD. It's an option, not standard equipment, like it should be.-Steve

 

You don't want to buy a truck without limited slip IMHO.

 

Sounds like it doesn't have it. I would keep looking.

 

If it has Anti spin it will be on the window sticker. It will be listed as an option and show the cost. Should be on the right hand side of the sticker.

 

Yes, just checked my new truck VIP sheet and it is listed as DSA and the charge is $285.00

 

You're obviously dealing with a salesman that's intent on selling you something he wants to sell. Go find another salesman or better yet, another dealer; another dealer that has trucks w/limited slip differentials in their diesels.
Greg

 

I totally agree. I would call the sales manager, explain the situation, and ask him for the best TRUCk salesmans he's got. Give him one more chance to match you up with a good salesman.

 

An open diff will probably give you less problems on ice. With an open diff you need to pay better attention to tire choice and maybe carry chains. I would much prefer a selectable locker over an open diff, as our trucks can get squrrely enough with a bit of throttle in corners on rain slicked roads, much less on ice where a limited slip will 'help you out' by thowing a bunch of torque to a wheel that is on the verge of slipping after the other one has started to slip.

 

I guess I have to disagree with that statement. You are talking about excess power to the wheels going into the corner. For me the the goal in winter is to not get stuck, and anytime the wheels are spinning you are loosing tranction to the ground. To have only one wheel with power is asking for trouble and large towing bills.

 

My vote is for the Anti-Spin Diff. My experience with a ltd slip and ice is positive. The ltd slip seems to work quite a bit going back and forth from side to side, but has not resulted in any sideways movement of the vehical. The only thing it does is help the forward progress more so than an open diff. If anything, I found a ltd slip vehical easier to control on ice.

 

Simple test...

Jack the rear end off the ground (chock the fronts). Put the truck in neutral and spin a rear wheel by hand.

Open diff will have the opposite wheel either still or moving in the reverse direction of your spin. Anti-spin will have the opposite wheel turning in the same direction as your spin.

Now - Tell the salesman to guarantee the truck has anti-spin in writing. If he does, then buy the truck... Then tell him to get a new diff on order or you're heading for a lawyer.

Better yet, deal with an honest (or educated) truck salesperson. What a shame they don't know their product.