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Search: Keyword(s): ; Posts Made By: derf
Forum: JK Tech Forum 12-29-2016, 09:08 AM
Replies: 23
Views: 1,366
Posted By derf
I was driving across flyover country to visit the...

I was driving across flyover country to visit the folks over Christmas. There was quite a bit of fog and it was below freezing. After a while my Truck Lites were completely caked over. Heaters...
Forum: JK Tech Forum 12-19-2016, 11:35 PM
Replies: 12
Views: 727
Posted By derf
I have 315's that measure out to 33.5". When...

I have 315's that measure out to 33.5".

When I was at low altitude before I put all the armor on, 4.56 were "adequate"

I moved to where I'm at a mile high and I added a bunch of armor. 4.56...
Forum: JK Tech Forum 12-17-2016, 01:02 PM
Replies: 20
Views: 1,170
Posted By derf
No. They don't. They only have to be within 1%...

No. They don't. They only have to be within 1% of each other.

You get more variance running low pressure in one tire than you get from the difference between 4.10 and 4.11 gears.

In fact,...
Forum: JK Tech Forum 12-17-2016, 12:38 PM
Replies: 8
Views: 455
Posted By derf
I've been running an E-Locker with a 10A fuse for...

I've been running an E-Locker with a 10A fuse for years. Never once gave me any problems.
Forum: JK Tech Forum 11-29-2016, 11:28 PM
Replies: 3
Views: 291
Posted By derf
Most gear sets come with a spec sheet. If...

Most gear sets come with a spec sheet.

If you don't have a setup bearing for the pinion, do yourself a favor and get one. Setting pinion depth is a major PITA if you don't have a setup bearing.
...
Forum: JK Tech Forum 11-24-2016, 12:15 AM
Replies: 19
Views: 1,198
Posted By derf
I'm running 4.56 gears with relatively short...

I'm running 4.56 gears with relatively short "35's" that actually run 33.5" tall in the real world.

Personally, I'd prefer to be running 4.88's for better off the line performance in town and...
Forum: JK General Discussion Forum 11-19-2016, 12:09 AM
Replies: 37
Views: 1,532
Posted By derf
If you're running a tire that actually measures...

If you're running a tire that actually measures to 35" when rolling on the ground, you'll want 4.88's. Those tires are typically advertised closer to 36" on the spec sheet.

If you're running a...
Forum: JK Tech Forum 11-12-2016, 11:22 AM
Replies: 7
Views: 413
Posted By derf
It's very likely you'll want to regear them. The...

It's very likely you'll want to regear them. The factory gears will probably be somewhere between 3.55 and 4.10. And with 37's you'll want at least 4.88s or more. And as long as you're in there,...
Forum: JK Tech Forum 11-12-2016, 11:05 AM
Replies: 9
Views: 643
Posted By derf
This. The whole "the pinion in the 5.13 is too...

This. The whole "the pinion in the 5.13 is too small" lie just keeps getting regurgitated by people who don't actually understand the engineering behind it. They only say it because they hear so...
Forum: JK Tech Forum 11-11-2016, 11:31 PM
Replies: 69
Views: 3,573
Posted By derf
Your programmer should be able to set the...

Your programmer should be able to set the computer to know about the new gears. But since it's a manual, it's not really vital. Still, it's a good idea.
Forum: JK Tech Forum 11-06-2016, 10:55 AM
Replies: 6
Views: 407
Posted By derf
It's best to drain the transmission when it's...

It's best to drain the transmission when it's level. The drain plug is in the middle of the transmission. If it's at an angle, you will end up with some fluid left in the transmission.

Oh, and...
Forum: JK Tech Forum 11-06-2016, 10:49 AM
Replies: 2
Views: 304
Posted By derf
It's probably the synchronizers wearing out. It...

It's probably the synchronizers wearing out. It happens to every transmission eventually. Try shifting into 2nd and then into 1st. Also, try shifting into neutral and letting the clutch out. Then...
Forum: JK Tech Forum 11-06-2016, 08:59 AM
Replies: 69
Views: 3,573
Posted By derf
It's not vital to reinforce the axle if you don't...

It's not vital to reinforce the axle if you don't wheel it hard. Still, 35's do increase wear. It wouldn't hurt to upgrade your ball joints and maybe do some C gussets.
Forum: JK Tech Forum 11-04-2016, 10:38 PM
Replies: 69
Views: 3,573
Posted By derf
When I did the gears in my D30, I did the Artec...

When I did the gears in my D30, I did the Artec full armor kit (truss, C gussets, lower control arm skids), chrome molly shafts, Eaton E-Locker, and heavy duty differential cover with Lube Locker...
Forum: JK Tech Forum 11-04-2016, 01:27 AM
Replies: 69
Views: 3,573
Posted By derf
Having too tall gears (higher numerically) can...

Having too tall gears (higher numerically) can actually hurt your gas mileage. Every engine has a "sweet spot" where it runs most efficiently. And it's different from one engine to another. Keep...
Forum: JK Tech Forum 10-30-2016, 10:37 AM
Replies: 69
Views: 3,573
Posted By derf
Late to the party but I did a write up on this...

Late to the party but I did a write up on this topic.

Regearing Basics (http://www.grimmjeeper.com/regearing_basics.html)

1. Shorter (higher numeric) gears provide more torque multiplication. ...
Forum: JK Tech Forum 10-16-2016, 11:07 AM
Replies: 5
Views: 410
Posted By derf
Read this to get a better understanding of what's...

Read this to get a better understanding of what's going on when you change tire size:

Regearing Basics (http://www.grimmjeeper.com/regearing_basics.html)

With the leveling kit, you probably...
Forum: JK Tech Forum 10-16-2016, 11:03 AM
Replies: 15
Views: 774
Posted By derf
I've got 4.56 gears with 35's. I'd rather have...

I've got 4.56 gears with 35's. I'd rather have 4.88's up in the mountains but it's not worth spending the money for such a small change.

I have an E-Locker in the front and it works great.

I...
Forum: JK Tech Forum 07-26-2016, 11:30 PM
Replies: 2
Views: 313
Posted By derf
If you didn't tell the computer about the change...

If you didn't tell the computer about the change in tire size, it will cause problems like lower mileage and hunting. That's the first thing to fix.

As far as gears for 33's, you could get away...
Forum: JK Tech Forum 07-25-2016, 11:46 PM
Replies: 11
Views: 659
Posted By derf
Yep. It's good to look things over. You also...

Yep. It's good to look things over. You also want to change the oil because breaking in new gears produce some fine metal powder as they rub together and start to mesh properly. That metal powder...
Forum: JK Tech Forum 07-25-2016, 11:41 PM
Replies: 5
Views: 884
Posted By derf
I upgraded to the better throwout bearing from...

I upgraded to the better throwout bearing from National when I did my upgrade to the Centerforce clutch. It's much better all around. It's worth installing it, even if you have to go to an...
Forum: JK Tech Forum 07-06-2016, 07:40 PM
Replies: 40
Views: 7,700
Posted By derf
I have 35's on my 2012 manual transmission 2dr...

I have 35's on my 2012 manual transmission 2dr JK. I went with 4.56's and it worked well when I lived at lower elevation and before I put all of the armor on my Jeep.

I have since moved to higher...
Forum: JK Tech Forum 07-03-2016, 09:10 PM
Replies: 9
Views: 874
Posted By derf
I looked for a Rubicon case for 2 years. All the...

I looked for a Rubicon case for 2 years. All the while saving up the cash. Once I had enough for an Atlas, I got one of those instead. Keep in mind, you will want new drive shafts if you're going...
Forum: JK Tech Forum 07-03-2016, 09:06 PM
Replies: 4
Views: 504
Posted By derf
I just swapped out the yoke on my rear to accept...

I just swapped out the yoke on my rear to accept a new driveshaft with real u-joints. My electric impact wrench had no trouble cracking it loose and getting it torqued back down.
...
Forum: JK Tech Forum 07-02-2016, 11:01 AM
Replies: 9
Views: 874
Posted By derf
There isn't anything to change the low range in...

There isn't anything to change the low range in the non-rubicon transfer case.

If you have an 07-11 automatic, you can use the Advance Adapters Rubicrawler: RubiCrawler | Advance Adapters...
Showing results 1 to 25 of 250

 
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