leeperryracing

Are gov-loc posi units any good?, i've heard a few horror stories about them.

RB83L69

No. They are about the worst option out there, especially on pavement. That's not what they're made for.

leeperryracing

A slightly used torsen 28spline posi from a '99 LS1 or an also slightly used posi-trac diff from a '95 LT1, which is a better buy? or are they pretty much equal?

RB83L69

The Torsen is the better of the 2. The 95 one is an Auburn.

PonyKiller87

What exacly is so bad about the gov loc ? I have one in my truck and it works great, far better than any posi truck Ive ever owned or driven.

About the only problem I could see is things get kinda wierd when you get the tires spinning very fast, like when you gun it from a stop in the rain, when it starts to grab theres some pretty violent power transfer from right to left.

gmgod

Yea, that violent power transfer sucks. I've got an 02 silverado with that diff, I don't like it.

PonyKiller87

Well it only really does it if you keep it to the floor when you got them spinnning really good. If you back off a little its not bad at all.

I guess for racing I would think it wouldn't be to bad being that your not really trying to spin the tires at that track, you want them to grab.


On a side not, the gov loc is also great for burnouts and donuts
Nice example I did a few months ago http://brewcitymuscle.com/~ponykiller87/

RB83L69

The way they work, is that they act like an open, until the RPM difference between the 2 axles exceeds something like 100 RPM; at which point the little governor thing in them makes them lock up. So, they always act like an open from a stop, and don't "switch" to lock-up until after tire spin has already occurred. They're made for use off-road, in traction-challenged places, like mud. They grenade when they lock up suddenly on pavement. The parts are small and weak, simply not up to the task of hooking up high power and sticky tires with traction.

Motor City Mike

Exactly. I would also like to add that at times they will lock when you don't want them to, and they will stay locked when you want them to unlock. Sometimes they will "lightly" engage, and it sounds like your rear end is coming apart when you're going around corners, and/or braking over bumps in the road. They also will not engage above 20 mph or so. Stay away from the gov-locks, especially for street use.

black3rdgen

yea what he said. they get left on the starting line alot

jmd

iTrader: (4)

gmgod

lol, I guess I better start taking it easy on the old truck.

laiky

funny, it seems most new GM trucks use this rear, my TB does. I can spin 1 tire in the rain while turning but not in a strait line. Seems good for bad weather driving. My brothers 84 camaro had one and was very good in bad weather where my 9 bolt is always wagging around. I liked the way it drove in the camaro, seemed like a more refined traction aid for daily driving. i agree that it doesn't make much sense for a performance car but it did work well.

PonyKiller87

I agree, it may not be designed to handle racing or the kind of launch that our cars would get out of it, but it sure seems to work good in the truck. Its been handling the abuse that I throw at it for the last 90,000 miles (up to 155,000 total now) and when I say abuse, I mean Offroad, onroad things that most people wouldnt imagine doing to a truck. I dont think I would ever put one in my car but if the one in the truck breaks I will deffinatly put another back in.

blacksheep-1

Try this next time you're at the drags, get the car straight, do a little chirpy and pull the car straight into the beams (straight is the operative word here). We used to do this with the Detroit Lockers back in the 70's and it worked well. Whether or not a gov-lok is a POS or not I don't know.
These guys would...
http://reiderracing.com/differentials.htm