So tell me about spools. I am in the process of building a CJ5 mainly for the trails but am looking for some street driveability. I just got the Clutch in last night and took it out this morning.
It has a limited slip in the rear and it seemed tight up on the lift, but man when I tried to take it up my test course this jeep is the biggest dog of them all. It just sat there and spun its two passenger side tires (front and rear). I am a believer of the lunchbox lockers, but the price of the spools is very attractive.
I have read what I can on this subject, but everything I read was pretty old, just wondering if there is a new consensus.
I'm running a spool in the rear of my CJ7. I love it. It is very predictable, strong, simple and inexpensive. Sure, turning in parking lots draws attention (bark bark bark bark) but its not a pavement pounder. Throw a lunch box locker in the front, spool the rear and call it good. One nice thing about a spool on the road, if the rear tires are the same psi, is that it will track very strait. Wont wonder around.
The limited slips are very much rebuild-able. An AMC 20 trac loc disc kit goes for 60$ give or take. I don't think they put out a D30 w/ limited slip from the factory???? Someone else may be able to answer that. The discs aren't very hard to replace. 4WD hardware or Quadratec both have the kit as do others for a better price I'm sure.
Well, I own two CJs, so i was thinking of taking the limited slip out of my CJ5 and rebuilding it and installing it in my CJ7 DD. Then taking my carrier from my CJ7 and putting some type of locker in it and installing it into my CJ5. I just dont know what I want to do. They dont offer spools for AMC20's, so welding it is the only option or lunch boxing it.
I'm running a spool in the rear of my Cj5. It is definitely predictable on the street. Wouldn't recommend it for an everyday driver but once and a while on the street it is alright. Awesome on the trail. Very strong and dependable.
When you weld the rear spiders, you call it a lincoln locker.
Keep in mind that if you weld the spiders, you also need to weld them to the carrier.
Mini-spools just replace the spiders, so you can pull it and go back to stock. A full spool replaces the whole carrier.
From personal experience, I'd say that running MT tires on the street is better. They don't grab the pavement as much as ATs will, making less noise, hopping less (the rear end will bounce because the tires are dragging), and tightening the steering radius.
Offroad, you'll notice the difference right away, and there's really no downfalls.
I wouldn't bother with rebuilding a limited slip. You will still be stuck with one wheel spinning when you need traction the most. Before I swapped the Dana 60 into the CJ7, I welded up the spiders on my trac-lok. I pulled the carrier out, cleaned the diff in the parts washer, then in a bucket of dish washing soap/water. After that I put it in the oven on an old cookie sheet @ 250° for about an hour. After that I ran it through the dish washer on "pots and pans" to remove any oils that were baked out of the pours of the cast steel. (Don't tell the wife )
After that, I put the diff back in the oven to pre-heat while I went out and got the welder set up in the shop. After pre-heating I took the diff out to the shop and welded the spider gears and gears to the case with E309L (stainless). The 309L is very resistant to cracking due to vibration and bonds well to cast.