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86 GL w/ 3.9's

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well i decided to climb under the scooby today to see what gears i do have, and if i do have an LSD, well it ends up i got 3.9's, so now i just have to go find a 3.9 LSD, much easier for me. i thought that 86's didn't 3.9's or was that with a LSD combo??

 

 

f9b62b47.jpg

 

Shean

my 88 gl wagon has a 3.9 open rear diff..

 

the only car that i know of that had a 39.lsd was the fulltime 4wd xt6 and even that was a special order option..

 

hunt around and you might get lucky..

 

otherwise the only way to get a 3.9 lsd is get a 3.7 lsd and do some modifying..

 

this summer i'll be putting a 3.9 lsd in my 88 wagon.. i just got lucky and know where one is at sitting on a shelf :D

XT6 FT4WD 5 Speed was available with a 3.9 LSD

Legacy (Turbo I think) Was available with a 3.9 VLSD

 

3.7 LSD can be changed to 3.9. I believe there is a how-to in the USRM

  • Author

you dont you just ahve to change the ring and pinon from the 3.9 stock to the other 3.7 settup?

 

i know there is an atricle on here, but its not really that informative on how to swap the gears, unless i missed that part.

 

Shean

Look at my picture under my name, the is what the LSD tag looks like, a 3.900 LSD would look the same, but have 3.900 instead of 3.700 and a different part number. When you create a 3.900 LSD you keep the ring and pinion of the 3.900 and change the carrier (the part the ring gear bolts to). The picture the you show is of a stock 3.900 open diff available of every 4WD Suby that is not turbocharged. The rear diff on the Legacy turbo is a VLSD, and is really not a good diff to use if you plan to 4 wheel with your car.

  • Author

Dr. RX, this car isnt for off-roading, i finally decided on that, im going to get a EA81 or older gen 1 brat for that, this is a street car, that is gonna be a s-curve car. mainly autoXing.

 

thanks for the heads up on what the tag looks like, now i know what it says.

 

Thanks again,

Shean

Aaron's Auto Wrecking usually has one of the VLSDs sitting around. But, you'll think a hundred bucks for a 3.7 lsd is cheap comparitively. :) Tom also sells them on ebay, know what they're worth.

Yea, Zap is right, if you can't afford $100 for a 3.700 LSD, then don't ever look for a VLSD. The prices that I have seen are between $200 and $400 for a VLSD. I think you best bet for autoXing is a LSD.

  • Author

well i can afford $100, but why pay that when people are gettin them from bone yards for $30 to $60 you know what i mean? so im just going to go and pull one my self, rather then deal with that other crap.

 

Shean

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