full time to part time

[TDscruiser]

Hey everyone, new to the forum, this is my first FJ 80, I have an FJ60 and figured its time for some more "creature comforts" lol.
Thanks for letting me join.

One question, I bought a 91 FJ80 with only the center diff lock. It's the fulltime 4wd, and Im just wondering if there is any conversions out there to convert it to a traditional 4wd setup.
She loves gas and Im hoping to maybe pick up a mile per gallon or so if I can somehow convert it to 2wd, 4hi, 4lo...
Any info would be great.

 

[REKCUT]

Here is some reading for you.

https://forum.ih8mud.com/80-series-...ansfer-case-into-part-time-transfer-case.html

 

[retrofive]

Tons of threads on this here. Just search.
The gains in MPG are irrelevant IMO.

 

[CJF]

At least give the all wheel drive a chance. It's common to be leery of it at first if you're used to traditional 4wd, but most of us end up loving it. I've still got my 4wd Hilux, but no way would I consider converting my 80 to part time.

 

[silverhorse]

https://forum.ih8mud.com/80-series-tech/362670-advance-adapters-part-time-conversion-mass-buy.html

 

[tirewater]

Weight is the primary contributor to poor gas mileage, not the frictional losses of driving all four wheels. The power required to move the vehicle shouldn't change (much) whether it's in two wheel drive or four wheel drive. At speed the frictional losses will be nominal.

While probably not an issue with the fj80, all wheel drive vehicles are generally designed to only have a portion of their power delivered to any one wheel. Exceeding that power delivery can end up in twisted and broken axles, CVs, etc...& increased wear. This is why you'll see sentences as "delivers up to 80% of power to rear wheels" in marketing.

To top it off, the time, energy & possibly money you spend in converting the vehicle won't be worth the few cents you save at the tank. Also include resale value in that price - is the resale going to be higher or lower when modified from stock?

 

[theside00]

the only real perk of converting is if you want to run chromoly birfs or Longs for bigger tires. It saves the wear and tear on the softer birfs so that last longer. In the AWD chromoly birfs only last 15K if you are lucky.

If you arent going to run 37 or bigger or be doing a lot of difficult trails there is no point. Also wheeling in awd and low with out the center diff engaged is really handy for 80% of trails.