LSD Front and Rear?

[YUPOK]

Ok, I have many questions about my 95 AWD.

1. What was the difference between the Automatic AWD Rear diff and the Manual Rear diffs?

2. If I have my car jacked up and the rear wheels spin opposite direction that means it's an open diff correct?

3. If I swap an LSD rear into my car, do I need both axles as well? There is a spline difference correct?

4. Rear Diffs for 1G and 2G are different correct?

5. If I swap an LSD rear into my car, can I also setup an LSD for the front drive axles like if I wanted to rallye? I imagine it would not turn well if this can be done.

6. Is there any issue if my AWD was an automatic and I did a 5 speed swap?

Thanks for the clarification.

 

[boost97gst]

Look in the door jam. Orange sticker will say if it has LSD or not. Auto and manual rears are different. The gearing is different i believe. The transfer case may(?) not be interchangeable as well.
LSD and non lsd axles are different in the rear, correct.
Id stick with the auto, but im biased. Im ditching mt to go AT. The strength of the auto tranny, even stock, is impressive.

 

[untouchablecc]

I don't think the transfer cases are interchangeable. The auto t case has an extra casting for another bolt hole on the top of it that only fits the awd trans.

 

[redi4axion]

Ok, I have many questions about my 95 AWD.

1. What was the difference between the Automatic AWD Rear diff and the Manual Rear diffs?

2. If I have my car jacked up and the rear wheels spin opposite direction that means it's an open diff correct?

3. If I swap an LSD rear into my car, do I need both axles as well? There is a spline difference correct?

4. Rear Diffs for 1G and 2G are different correct?

5. If I swap an LSD rear into my car, can I also setup an LSD for the front drive axles like if I wanted to rallye? I imagine it would not turn well if this can be done.

6. Is there any issue if my AWD was an automatic and I did a 5 speed swap?

Thanks for the clarification.

The gear ratios are different between the two. 3.307 auto, 3.545 manual.

If you jack the car up and spin one rear wheel and the other one spins in the opposite direction you have open diff.

If you swap to an LSD rear you may or may not need both axles. Its hard to find info on that so might as well get a matching set.

Yes 1g and 2g rear ends are different

In regards to rally you dont really need all around LSD or even a rear LSD unless you are serioulsy worried about "in-step" and truth be told its just more stuff that will burn out and need replacing.

There is no issue to do auto to manual but watch out for the reverse lights and cruise control not working. You will have to wire in the reverse lights seperate or just get a manual engine wiring harness and people usually ditch the cruise control.

 

[YUPOK]

Wait, So the rear differential gearing was different on auto and 5 speed?

I wonder if this is why the car has an open rear, PO must have changed the diff as well when he did the 5 speed swap.

Apparantly the automatic AWD's were more common with the LSD.

I should pull the cover and check the gear ratio just in case.

Ok, this makes a lot of sense now, and I know what to do if I want to go with an LSD swap.

Thanks

 

[Xray2k4]

You can also buy an EVO3 LSD and keep your existing diff cups.
I bought 1 from the ebay seller below it came it was shipped with Fedex took 1 week from Malaysia to Canada.

He has 1 more for sale for the folks interested on getting rid of there open diffs.

JDM Mitsubishi Lancer EVO 1 2 3 Full Lock LSD Differential Rear Slip Kit 4g63 T | eBay

I think at 200$ including shipping it's cheap enough to fit most budgets.

Regards

 

[dsmpat95]

Here http://www.dsmtuners.com/forums/road-course-autocross/400884-lets-talk-difs.html
http://www.dsmtuners.com/forums/dri...erential-identifiers-manual-vs-automatic.html

 

[estoyaqui30]

Wait, So the rear differential gearing was different on auto and 5 speed?

I wonder if this is why the car has an open rear, PO must have changed the diff as well when he did the 5 speed swap.

Apparantly the automatic AWD's were more common with the LSD.

I should pull the cover and check the gear ratio just in case.

Ok, this makes a lot of sense now, and I know what to do if I want to go with an LSD swap.

Thanks

Look at the back cover of your diff. for the letter code. There should be a 3 letter code that you look up to see what is in it. Also, keep in mind that the LSD in these cars is a viscus type and they (if I am correct) behave differently. They don't act limited unless you push them hard and heat up the fluid. I've had 2 of them so far (including the factory original) with the code "BFH" the car is a 99 GSX and if you jack up the rear of the car and spin one wheel, the other will spin the opposite way. I just replaced it with a KAAZ LSD.

Axles are different between LSD and non LSD. Axle shaft is larger diameter for the LSD and the inner CV's have different configurations as the passenger side will have a 2 stepped end with a smaller area also splined. EVO III LDS's will fit in the same housing but the gear ratios are different between 5SP and auto and I believe they are different on the EVO III also.

 

[Xray2k4]

Look at the back cover of your diff. for the letter code. There should be a 3 letter code that you look up to see what is in it. Also, keep in mind that the LSD in these cars is a viscus type and they (if I am correct) behave differently. They don't act limited unless you push them hard and heat up the fluid. I've had 2 of them so far (including the factory original) with the code "BFH" the car is a 99 GSX and if you jack up the rear of the car and spin one wheel, the other will spin the opposite way. I just replaced it with a KAAZ LSD.

Axles are different between LSD and non LSD. Axle shaft is larger diameter for the LSD and the inner CV's have different configurations as the passenger side will have a 2 stepped end with a smaller area also splined. EVO III LDS's will fit in the same housing but the gear ratios are different between 5SP and auto and I believe they are different on the EVO III also.

Quick correction

If you take the faster reacting clutch type LSD from inside an EVO 3 housing it will work with any diff covers from any auto or manual 1g, 2g, JDM EVO 1-3 and USDM EVO8-9.

The ring and pinion gear set is what changes between auto and manuals which you can keep while doing a LSD swap.

The only thing that's not compatible is putting a DSM/EVO1 viscous LSD unit in a none LSD DSM housing since the viscous type LSD will not fit the diff housing, this doesn't occur with the EVO2-9 clutch type.

 

[YUPOK]

Thanks for all your help guys, this was good info. I'll run the numbers on the housing and see what it really is. I'm used to truck and van rear diffs so this viscus coupler concept is new to me. If it does turn out to be an LSD I'll probobly change out the oil and clean everything good cause it's been sitting so long.

My goal is to make this car a DD but I live on a very steep hill and the roads in this area are very windy and up and down. It can be a nightmare when it snows and rains so I would ultimately like one more wheel pushin back there when things get hairy to move me along.

Thanks again!!