Anyone have the parttime 4wd kit? Does it work ok. Also anyone know where i can get one at i looked on man a fre and everywhere else but its not available.
Part Time 4WD
- Thread starter mitchhonore
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www.sleeoffroad.com has them.
The general consenus on the board here is that you really don't net anything like better MPG or more rear wheel power. Bout the only real gain would be less wear & tear on front components. Thats about all I could gather a while back when I looked into it.
The general consenus on the board here is that you really don't net anything like better MPG or more rear wheel power. Bout the only real gain would be less wear & tear on front components. Thats about all I could gather a while back when I looked into it.
According to Slee's website if you have a VC, you remove it, kit fits 91-97 model 80 series. http://www.sleeoffroad.com/products/products_drivetrain_driveshaft.htmSUMOTOY said:
firetruck41 said:
Good to point out FT that it would be better to say this mod requires the VC be removed. I was wrong then, it is an option. One that might cause one to consider the drawbacks of VC removal for minimal gain. It works, "ok" may need to be defined.
sj
- Thread starter
- #6
SUMOTOY said:
yes its the 93 with the abs and disk nrakes
Marks Adaptors have the kits to convert to part time 4WD.
Here is their info on them:
http://www.marks4wd.com/lc-80SERIESPT4WD.html
I have heard that there is less vibration, less front tyre wear, better fuel economy, lighter steering, less backlash. Can also allow you to put an auto locker in the front.
I must say that I reckon that my '97 80 series cruiser steers better than my 60, so I'm not really after 'lighter steering'. Fuel is quite expensive nowadays so the better fuel economy would be appreciated.
I did find that my 60 felt more sluggish and the steering was heavier (and more vibration) if driven with the front hubs locked so I would expect improvement in my 80 with a part time kit.
The main concern is that it may make my vehicle unroadworthy due to it allowing the ABS system to be disabled.
The part time conversion kits usually come with weaker free-wheeling hubs, so I bought used Aisan hubs and will be buying the part time kit without the free-wheeling hubs.
Here is their info on them:
http://www.marks4wd.com/lc-80SERIESPT4WD.html
I have heard that there is less vibration, less front tyre wear, better fuel economy, lighter steering, less backlash. Can also allow you to put an auto locker in the front.
I must say that I reckon that my '97 80 series cruiser steers better than my 60, so I'm not really after 'lighter steering'. Fuel is quite expensive nowadays so the better fuel economy would be appreciated.
I did find that my 60 felt more sluggish and the steering was heavier (and more vibration) if driven with the front hubs locked so I would expect improvement in my 80 with a part time kit.
The main concern is that it may make my vehicle unroadworthy due to it allowing the ABS system to be disabled.
The part time conversion kits usually come with weaker free-wheeling hubs, so I bought used Aisan hubs and will be buying the part time kit without the free-wheeling hubs.
I didn't notice much difference in fuel economy but there was a noticable increase in power. Definatlly a lot smoother with litlle or no backlash. On the down side you loose out on the handling especially in the wet but you get used to it.. But you can have more fun in the mud in 2wd.
- Thread starter
- #9
"If your vehicle is fitted with ABS brakes the kit can be fitted but the ABS malfunction light will appear and the brakes will revert back to STD (non-ABS). To prevent this the free wheel hubs can either not be fitted or simply engaged when ABS is required"
it says that on the marks 4wd what exactly does this mean, in 4wd you dont have abs but when your 2wd your abs is on?
it says that on the marks 4wd what exactly does this mean, in 4wd you dont have abs but when your 2wd your abs is on?
I believe it is saying if you keep the front wheels/hub rotating (as in 2wd but with hubs engaged) the ABS will work, but if you disengage the front wheels/hubs (disengaging the freewheel hub) ABS will not work.mitchhonore said:
- Thread starter
- #11
Aussie cruiser said:
I got it now, but how does it not save you any gas.
mitchhonore said:
Apparently, the work to turn the front drivetrain is just not that significant. For example, anecdotal evidence from the 3FE list shows that 1991-92 FJ80's don't even necessarily do any worse mileage-wise than 1988-90 FJ62's, even though they're heavier and have AWD.
Curtis
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The ABS pickup rings are on the birfs, if the front hubs are unlocked the ABS will not work. Most that have run in rear wheel drive report little or no mpg increase. If you want to test drive in rear wheel drive, just remove the front driveshaft, lock the CDL and drive.
mitchhonore said:
Lo
A: Weight and bad aero profile dictates the mileage more than drive wheels for one. Next, it also is an indicator that driveline loss through the center diff is the highest, and the additioinal drive axle doesn't play a big part in DLL.Hi
A: Audi did a lot of research on awd when they tried to explain how the same chassis got 'better' mileage with awd. They did some really complicated tests and found that the rolling resistance decreased when power is transmitted via 4 wheels.It's pretty well documented here that it's a lot of work for little gain, and with the ABS/VC equipped 80's, you lose ABS and VC functions for a slight to no increase in mileage.
Summary: If gas mileage is the goal for lockouts, don't expect much.
Scott Justusson
As I see it, the mpg gains will be marginal because in 2wd the only thing making you more efficient is that you are not turning the front driveshaft and axle, with full time 4wd you are only increasing the friction by turning the front axle and driveshaft, either way you are still moving the entire vehicle so the friction of the driveshaft/axle are a miniscule percentage of the total power needed to move the vehicle.
Personally, I don't have a good reason to ever switch my 80 to 2wd (part time 4wd), and I don't think many people will see much benefit in the mpg department.
Personally, I don't have a good reason to ever switch my 80 to 2wd (part time 4wd), and I don't think many people will see much benefit in the mpg department.
It is a relatively inexpensive modification to make if you are in the tcase anyway. In my case I was, so I did the 2wd kit. In my opinion, the performance is better, fuel economy is only slightly better, but the main reason was wear. I liked the idea of not having the load on the front axle while I am daily driving. I figured that in the long run I would have less wear on the birfs and bearings with out the extra load.
Ya'll keep in mind that this is my opinion on MY truck. There is no engineering here at all, only an opinion. I would tell everyone one on this forum to do the mod if you have to tear into your tcase.
G
Ya'll keep in mind that this is my opinion on MY truck. There is no engineering here at all, only an opinion. I would tell everyone one on this forum to do the mod if you have to tear into your tcase.
G