I have a 98 that has part time, full time and low gearing for my 4x4. This is my first winter with my GC so I was wondering what the safe top speeds are for the part time and full time gears are and what is the difference between the two?

 

Full time max is 110-120 imo

Max 4hi is 50ish

Max 4Lo is 25ish

Part time should always be on slippery surfaces ONLY never on pavement.

Those are all in km/h obviously.

 

The gearing for 4Hi is 1:1 and 4Lo is probably about 2.72:1. so 4Hi is basically a type of all wheel drive.

 

I wouldnt use it as such though. Reason being; Chain in the t-case

 

Think about it, 4 full time, you can use it on normal pavement. All 3 of my jeeps have the 4hi(full time) N and 4lo, so if you don't want to worry about the weather, feel free to use the 4 full time. 4 part time is for slippery cases like they said.

Edit:
And for speed while in 4 full time, drive like you normally would in the given weather conditions.

 

4hi is "part time", not "full time". AWD is fulltime

 

It depends on your t-case, I just have hi n lo so my hi IS full time. If you have 2hi 4hi n 4 lo, that is a part time t-case. If your t-case says 4part and 4full then you have both.

 

Ok, they say 4hi all time, but that is still full time when comparing to the part/full ones. But they are not awd.

 

I've got the 231 tcase, so I have 2, 4 hi, 4 low.

I've had that well in the 60-75mph range with no trouble yet.

 

You have a 249 case which does NOT have 4hi. 4hi is locked like 4lo and is NOT fulltime.

The 242 has 4hi and 4 full time which is just a fancy name for AWD.

Both the 242 and 249 cases are AWD cases

 

Still, I answered his question correctly for my knowledge, or lack there of...

 

Just wanted to correct you so someone doesnt think they can run 4hi whenever

 

Yes, on most vehicles, when you see 4 hi, it is part time unless it's certain t-cases.

 

Ok you guys are being to technical 4-lo is formal power and slow speed and 4-hi is for power and normal driving and I know some of you will probably disagree but I build transfer cases and trannys so I know that I am right

 

LOL nice