XP 1k Diff in a S

At least we know that one will fit with slight modification. Thought I would share these pics that a friend sent me. Im going to do this to my old 08 this week. Im just trying to buy time until the 2015's come out. The 1k diff isn't really any more expensive than the other diffs..so its a no brainer to me.

I think it is time for you to get a new machine.......   

Big-R wrote:

I think it is time for you to get a new machine.......   

   The good news is the wife done told me to go get a new 1K, but I am going to try my best to hold out on the 15's in hopes that some of the bugs are worked out. I never get rid of anything, so Frankensteining the 08 is kinda fun for now.

RickyBobby wrote:

Big-R wrote:

I think it is time for you to get a new machine.......   

    The good news is the wife done told me to go get a new 1K, but I am going to try my best to hold out on the 15's in hopes that some of the bugs are worked out.  I never get rid of anything, so Frankensteining the 08 is kinda fun for now.

I hear ya. I think that is a good idea. I always said I would not buy a first year anything. However, my 900 XP is a 2011   

IS the gear ratio the same in the 800?

RZRS-EDGE wrote:

     IS the gear ratio the same in the 800?

Jerry, there seems to be some confusion about that. The 900 and 800 FRONT diff ratio are both 3.82:1

The 900 and 1000 both have the same REAR ratio of 3.53:1 , where as the 800 has a REAR of 3.70:1

There have been several 1000 diff swaps in the 900's and all works well as far as I know. There have been several 900 diff swaps in the 800's and all works well. But the specs on the 1000 diff says a front ratio of 3.182:1 which makes no sense and I think is in error.

Remember that the Hillard diff is an over running clutch that only engages when the rear wheel spins which means the front pinion gear has to turn faster to catch up for engagement.. At 3.82:1, that means 3.82 turns of the pinion gear for every 1 turn of the ring gear. So, since the front and rear are different ratio's you are never in 4wheel drive when all wheels are turning at the same rate....These small differences in gear ratios are just determining how quickly the front engages with respect to how much rear wheel spin is required. With the 800 at rear of 3.70 and front of 3.82- it takes more rear wheel spin kick in 4wd than the 900

Short Answer: I don't know if the front diff in 1000 is the same ratio as in the 800 and 900 because I think their spec listing for it is a typo. I have a feeling that there is a good chance that it is but if not its close; but  the rear ratios ARE different. 

I figured the 1000 was geared alot lower with 28s, they must have made up for it in the
transmission

It seems that the front gear ratio on the 1k is 3.76 and the rear on a 800 is 3.70. The front just a tad lower which I think is about as perfect match up as you can get.

Gilbert Designes have their prototype weld in kit for the 1k diff in the 800 done. They will be available shortly if anyone is interested in such a swap and don't want to have to fab up their own mounting.

Very cool, will definitely upgrade when mine inevitably grenades or if I rip off my A-arm mounting tabs.
http://gilbert-designs.com/store/xp900parts/

RZRS-EDGE wrote:

 I figured the 1000 was geared alot lower with 28s, they must have made up for it in the
transmission

Its my understanding the transmission in the 1k is exactly the same as the 900. As in same part numbers. Atleast thats what I read over on the RZR forums. Someone over there also has already stuck a 1k motor into a 900 and said it will bolt right in with just changing a few mounts with factory 1k mounts. I think the only fab work was the header since it has to be cut down. Couple of companies are working on kits that comes with all the needed parts to do th swap.. I was very interested to see that. Cause at some point I'd like to have the power but I don't see us going back to a two seater and I really don't want a longer machine then I already have.

8ball_99 wrote:

RZRS-EDGE wrote:

 I figured the 1000 was geared alot lower with 28s, they must have made up for it in the
transmission

Its my understanding the transmission in the 1k is exactly the same as the 900. As in same part numbers. Atleast thats what I read over on the RZR forums. Someone over there also has already stuck a 1k motor into a 900 and said it will bolt right in with just changing a few mounts with factory 1k mounts. I think the only fab work was the header since it has to be cut down. Couple of companies are working on kits that comes with all the needed parts to do th swap.. I was very interested to see that. Cause at some point I'd like to have the power but I don't see us going back to a two seater and I really don't want a longer machine then I already have.

  

I've been working on this swap in mine over the weekend and you don't have to cut all the underneath out in the front. I made mounts out of 1/4 flat and some angle for the steering rack. The 1k diff fits nice and everything lines up great . Just a little bit of welding left.

If anyone is interested doing this, the best price I found on the diff was at cheap cycle parts for $890. IMO, if you had to rebuild or fix the 800 a or 900 diff  you could have at least half into what you can get the 1k for and besides the 800 and 900 diffs are just too weak.

Some pics of my progress:



The steering rack mount


The mounts


The diff just sitting in there


And just a pic of my antique on how it sits now. Shortly it will live again and i will be able to shout out that famous Frankenstine quote "it's alive!" Lol





  

  

Here is the difference in front and rear wheel turn with the 1k diff in a 08 rzr 800.


Sometimes it is just easier to see things at the wheels.

That ain't enough difference to even remotely worry about!

Well guys it lives and after testing it out today it's awesome! When you hit the switch its immediate 4 wheel drive. You don't loose any momentum by having to wait on the rear wheels to spin before engagement. You can feel it pulling hard. Since the front end is always pulling, you can feel it in the steering and makes it a tad harder.

 

fyi I have a 2014 xp 1000 do not backup in a bind in 4 wheel drive case will split very easy. cost about 2500.00 to fix if no warranty.

rangerpat wrote:

fyi I have a 2014 xp 1000 do not backup in a bind in 4 wheel drive case will split very easy. cost about 2500.00 to fix if no warranty.

Man you got ripped off if you had to pay that!! You can get a new 1000 front diff for around $900 so they charged you $1600 for labor if thats all you had done!

rangerpat wrote:

fyi I have a 2014 xp 1000 do not backup in a bind in 4 wheel drive case will split very easy. cost about 2500.00 to fix if no warranty.

Thanks for the info on that. I haven't heard or seen anyone break the 1K diff yet. Edge is right- a new complete diff around $900 and 1 hour of labor at most. At $2500 you are most definitely getting   

Now that I have gotten a few rides in with the new 1K diff, just a follow up with a quirk that it does have to let you know about.

4wheel is immediate when switch is turned on. However, when switch is turned off 4wheel does not immediately stop...It takes it a few moments to fall out. This isn't an issue with me and no biggie but worth mentioning.

All in all it is an awesome upgrade to any 800 or 900 rzr.

Are you saying that 4wd is fully engaged when you flip the switch not just when the rear tires slip? My Rhino is like that and it makes for some heavy steering, esp. in diff lock. My 900 only kicks in when the rear tires slip.

oldmustangjunkie wrote:

Are you saying that 4wd is fully engaged when you flip the switch not just when the rear tires slip?  My Rhino is like that and it makes for some heavy steering, esp. in diff lock.  My 900 only kicks in when the rear tires slip.

Yes. Its because of the slightly taller gear. At times I can feel it in the steering but when out on the trails that require 4wheel, it feels about the same as before.

Any chance these pics are still out there anywhere?