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GB2000
GenIII
11/08/2005
14:36:40
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 Subject: RE: first winter with rear wheel
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Message:
i know posi is a GM term but are they the same? LSD will still slip but i thought posi was completly locked
Don't know if they're identical (I'm not super knowledgeable bout this kinda stuff), but I know they're pretty similar in the sense that both rear wheels will spin (compared to my peg-leg open diff...lol). I'm not sure how much "slip" one has as compared to the other though.
Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!
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Wildman5977
Dodge Dakota
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11/10/2005
03:07:05
|  RE: first winter with rear wheel
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Message:
LSD= Limited slip differential, this is NOT a POSI differential, generally the right rear wheel will spin first, however, by using light to moderate pressure with your E-Brake, (1/4-1/2 of full pressure) in most slippery situations you will have both rear wheels driving to get you started down the road. This will 'trick' the clutches and 'lock-in' both rear wheels, remember to release your brake when you go faster than 10-15MPH
POSI= both rear wheels are driven,
Dodge has both the POSI and LSD differentials on the trucks however the POSI is mostly on 4wd models. another way to tell is to jack both rear wheels off the ground and with the transmission in nuetral spin one wheel by hand, the other rear wheel will either spin in the same direction (POSI), or in the opposite direction (LSD)(My 2k dakota CC has LSD, my 69 A108 has POSI)
I am pretty sure this will let you know what you have. It has been a while since I have done this.
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Jasonb61
Dodge Dakota
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11/10/2005
03:18:53
| RE: first winter with rear wheel
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Message:
im not sure about the LSD method.. I had a 93 4x4 3.9 dak that was wrecked by my uncle and I remember when I sold the rear off it, if I would spin one wheel, the other went the other way. If I remember correctly...
-Jason
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moparR/T
Dodge Dakota
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11/10/2005
11:17:01
| RE: first winter with rear wheel
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Message:
posi IS a gm term, and ur right posi and LSD are the same.
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Kowalski
GenIII
11/10/2005
16:58:51
| RE: first winter with rear wheel
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Yup, and wildman is confusing LSD with an "open" rear, the two stock possibilities.
Lead, follow, or get out of the way
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ck98daksport
Dodge Dakota
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11/10/2005
17:19:16
| RE: first winter with rear wheel
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Message:
The best advice I can give you is to find an empty parking lot when it snows and just screw around a bit putting yourself into spins and exaggerated acceleration from a dead stop etc. Get to know how your truck is going to react in situations like that and you'll figure out how to compensate to correct. Reminds me how the old man and I use to go out in the 73 firebird and do donuts in winter. Going on 3rd winter with RWD and no problems so far. Got 280lbs of sand in the bed in winter, seems to do the trick.
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moparR/T
Dodge Dakota
JOIN HERE
11/10/2005
21:30:42
| RE: first winter with rear wheel
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Message:
im sorry i made a mistake in my other post"posi and LSD are the same" i ment to say posi and LSD are not the same, i was in school and in a rush. i may be wrong but,i always though LSD was limited slip and will allow for some slipage(barely) around turns and things like that. i know this because i drive a dakota r/t with the 9.25 limited slip. but i also though POSI was GM's term for "locked" meaning no way of slipping what so ever. i have never tryed to do a burn-out and only one tire spin which means my rear barly slips at all which is why i can see people believing it is a locked rear
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Joey
Dodge Dakota
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11/11/2005
00:01:21
| RE: first winter with rear wheel
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Message:
nice box u made..... but u actually want to put the sandbags as close to the tailgate as possible not just over the rear axle so that not only does it add weight to the back but it also takes weight off the front. think of it as a seesaw and that the more towards the edge of the thing u are, the more weight u will be able to lift that is on the other side.
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GB2000
GenIII
11/11/2005
00:43:18
| RE: first winter with rear wheel
IP: Logged
Message:
Put all that weight against the tailgate and then take a corner too fast on snow/ice...you'll learn REAL fast that it's a bad idea unless you enjoy doing donuts every time you turn too hard.
You want the weight over the rear axle...the goal of adding weight to the back isn't to take weight off the front, it's to add weight to the rear (thus giving the tires more traction).
And I know what Wildman said about posi and lsd is definitely not right...like mentioned above, he's confused open diff (tires spin in opposite directions when jacked up and spun by hand) and limited-slip (both spin the same direction).
I don't think the thought that LSD has slippage and posi doesn't is completely true...if that was the case, then all Dodges (since Dodge refers to it as LSD and GM refers to it as POSI) would have slippage around corners and GMs wouldn't...therefore GMs would all be much more difficult to drive in the winter due to not being able to corner for crap and every rational person would drive Dodges. And even though I'm not a huge fan of GM...even I will admit that that's not true.
I think we may all be confusing true limited-SLIP differentials with lockers, perhaps?
Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!
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moparR/T
Dodge Dakota
JOIN HERE
11/11/2005
13:18:29
| RE: first winter with rear wheel
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Message:
"I think we may all be confusing true limited-SLIP differentials with lockers, perhaps?"
Yes i think your right. i wasnt sure if posi was a true locker or not.
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Kowalski
GenIII
11/11/2005
15:25:12
|  RE: first winter with rear wheel
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Message:
Maybe you all, but not me. Posi is simply GM's name for limited slip - it is not a locker.
Lead, follow, or get out of the way
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mccamp
Dodge Dakota
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11/11/2005
17:00:00
| RE: first winter with rear wheel
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Message:
Kowalski is correct. Posi is a term for GMs limited slip, but the term is used so much it has become like xerox or kleenex and people use the name brand when describing a product or application outside of GM eventhough it is incorrect. Lockers are different, and on a stock vehicle the only ones that come from the factory have to be activated by a button or lever such as H2s and Jeep Rubicons...if you dont have a button, and you have a from factory traction aid it is a limited slip
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2003 4.7
Dodge Dakota
JOIN HERE
11/13/2005
01:23:04
| RE: first winter with rear wheel
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Message:
I'm a Florida boy that lived in downeast Maine for a couple years. At the time I had a '95 318 REG CAB 5 speed 2x4. She had an open 8 1/4 with 3.23 gears. The only thing I did was to get some good Michelin L/T all terrain tires. I learned that most of the sucsess of driving on several inches of snow/black ice is in the techneque. Don't try to get rolling from a stop too fast(the second gear start is a good sugestion unless you want to go sideways). And DON'T try to stop very fast. It's best to plan ahead if possible. I put a sandbag in the bed a few times if it was really icy, and to use it to climb the driveway. My ex had a Ford F150 4x4 with a 351, and I could follow her just about anywhere.
Practice, practice, if a Florida boy can do it, just about anyone should.
OH for WIW Dodge called their LSD Sure Grip in the sixties and seventies then just LSD now, GM has always called theirs Positrac I think. Both of these allow a small amount of slip to the inside tire on a turn, this keeps it from premature wear and narrows turn radius. Lockers like Detroit, Powertrax lock the axel together except on very sharp turns. Then there supposed to release the inside tire like a LSD.
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Wildman5977
Dodge Dakota
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11/17/2005
04:56:49
| RE: first winter with rear wheel
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Message:
The LSD is the basic stock option,
the 'Anti-spin' is the new dodge term for a posi,
and yes there are the aftermarket 'locker' rear end kits
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GB2000
GenIII
11/17/2005
12:32:41
| RE: first winter with rear wheel
IP: Logged
Message:
Wildman...you're confusing LSD with open (aka peg leg) still.
Josh Blackshire - Founder, OhioDakotas.NET
Red 98 Dakota Sport - Check it out!
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Kowalski
GenIII
11/17/2005
16:03:24
| RE: first winter with rear wheel
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Message:
Yup - the open rear is the basic one; LSD is "anti spin".
Lead, follow, or get out of the way
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SR
Dodge Dakota
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11/17/2005
17:22:16
| RE: first winter with rear wheel
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Message:
Strongly consider getting a set of snow tires--they are significantly better than all-season tires when it comes to snow and ice traction. For snow traction, you'll want tires with a lot of sipes (fine cuts in the tread). The downside of snow tires is that they wear quicker, due to the softer rubber.
I've got studded snow tires on my 4x4 QC, and my wife has studless Blizzak tires on her FWD vehicle. Those Blizzaks are amazing on the snow!
BTW, I'm writing this from Alaska, where we occasionally get a little snow every now and then...
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