my99/00 wrx rear diff type
 

What type of diffs do the my99/00 wrxs have??

front open, LSD viscous coupling, what is the rear... viscous limited... suretrak... open...?

if say 4 wheels have no traction on this model will it just spin 1 wheel on each axle or will 2 wheels at the rear spin and 1 at the front ?

can't find much information for the ADM my99/00 wrx.

I believe the standard rear diff is a viscous open also. This enabled the cars to be more street friendly with turning etc.

I swapped mine out for an early model STi rear, 2 way mechanical LSD. It makes the car more predictable on the limits of grip and oversteer, however tends to lock up and clunk a bit for street driving if I have my centre/front diff locked also.

Front diffs are open...one can get various front LSD's including plated (clunky, noisy) or helical (not noisy - standard on Type RA V Limited).
I have an RA V Limited helical front LSD for sale if you're interested....see for sale section.

Okay so its like the one in this video? [url]https://www.youtube.com/watch?v=w2bRb17jJ1U[/url]

looks like when one wheel slips the fluid heats up and rotates the other driveshaft,
probably helpful on sand and slippery surfaces.
so if i was stuck on ice would 3 wheels spin and one at the front no spin? (example)

for performance applications its an open diff.

had a quick look at this chart

[url]http://home.gci.net/~cowdookey/818/TransmissionIDChart_Public.pdf[/url]

looks like most turbo models come with what is called a rear vlsd.
no ADM wrxs on that chart though.

Nauli. How much you want for the font diff?

[QUOTE=boskoj;822358]Nauli. How much you want for the font diff?[/QUOTE]

PM sent

R160 rear diff types.......

[IMG]http://i184.photobucket.com/albums/x310/fateo66/LSDs/R160_zps7404b2bb.jpg[/IMG]

[QUOTE=Rossco;822372]R160 rear diff types.......

[IMG]http://i184.photobucket.com/albums/x310/fateo66/LSDs/R160_zps7404b2bb.jpg[/IMG][/QUOTE]

thanks,
saw your car on cambridge street a week ago or so around 5 pm ish.

diffs
 

Posting yet?

I thought that ADM standard WRX's had open diffs, Foresters a plated rear LSD.

Mine has a 2 way mechanical LSD and an standard open front diff. The Torsen type rear LSD gives excellent traction in the wet, gravel, sand or if one wheel comes off the bitumen, eg rally cars. BUT it wears out tyres, just rolling down a slope and turning the wheel 1/4 turn will stop the car. It tries to push the car in a straight line when locked up. It also only acts as a LSD if both wheels are loaded. When pushing it if one wheel comes off the ground it reverts back to behaving like an open diff. Plated and viscous LSD's don't have this fault. Open or LSD they all have their good and bad points and they can be fussy about having the right oil.

GC8 wrx's have open front diffs with viscous rear LSD's.

Gc8 STi's have open front & Suretrac LSD rear.

The oil type for Viscous makes no difference - the Viscous unit is a sealed assembly.

Great, Rosco had the missing STi answer.
Unless you have a traction problem a front LSD might not be much use. A LSD will try and turn the front wheels at the same or a simular speed, this is good in a straight line, but when cornering it will increase the Subie understeer.
When hammering it around a corner what would help would be a bit of light brake pressure on the inside front wheel to try and slow it a bit and speed up the outside front wheel. This would improve the handling more than a front LSD. Unfortunately not an option on the older Subies. Maybe the new ones have it along with all the other electronic aids.
Didn't get specific with the diff oils as if I write too much or take too long writing it, it doesn't post. Just doing this to get my posts up so I can access other areas.

[QUOTE=gosurfun;822546]Great, Rosco had the missing STi answer.
Unless you have a traction problem a front LSD might not be much use. A LSD will try and turn the front wheels at the same or a simular speed, this is good in a straight line, but when cornering it will increase the Subie understeer.
When hammering it around a corner what would help would be a bit of light brake pressure on the inside front wheel to try and slow it a bit and speed up the outside front wheel. This would improve the handling more than a front LSD. Unfortunately not an option on the older Subies. Maybe the new ones have it along with all the other electronic aids.
Didn't get specific with the diff oils as if I write too much or take too long writing it, it doesn't post. Just doing this to get my posts up so I can access other areas.[/QUOTE]


Most LSD front diffs (if not all) are only a of a limited lock design, due to the steering issues that would arise as you have described.


Where is your intro thread?