automatic diff???
12-05-07, 03:19 PM
#1
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automatic diff???
hey i was woudering if i can use a lsd/diff out of a automatic and throw it in to a manual rear end? i have a base model s4 and i might get a auto gxl diff/lsd.
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12-06-07, 10:28 AM
#8
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My car was an auto and I put a manual tranny in it but I kept the auto rear. I figure its not that huge a difference between 3.9 and 4.1. If I were going to go through the effort to change it I'd go with the 4.33 from a GTUs, though they might be harder to come by.
12-06-07, 10:29 PM
#11
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i personly would rather stick with my gears now because i am used to it. i plan on drifting this car so i just dont want to keep on dumping money and wind up killing my car because i dont pratice. once i get it down better i might bump to an after market r&p set up
12-07-07, 06:00 AM
#14
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if i am going to keep my gears the same but use just the lsd doesn that mean i will have to buy any thing new ie barrings..... internal stuff?
12-07-07, 09:52 AM
#16
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If you are going to drift you for sure don't want to use an auto diff. the 3.9 to 4.1 ratio is a big change you will need more RPM to keep tires spinning making your motor work harder than it is already. it would be easier to drift a car with a higher gear ratio since at a lower MPH you are at higher RPM 4.33 GTUs diff is sweat just a comparison with a 4.10 stock diff at 80MPH you are at 3000 RPM with the 4.33 GTUs at 80 you are at 3500-3600 rpm so figure it out.
my boy has a 4.33 one in his ford V8 swap with a stock AOD and that thing drifts like a beast he spins out more than drifts but when he gets it right ohh boy
my boy has a 4.33 one in his ford V8 swap with a stock AOD and that thing drifts like a beast he spins out more than drifts but when he gets it right ohh boy
12-07-07, 12:49 PM
#17
If you are going to drift you for sure don't want to use an auto diff. the 3.9 to 4.1 ratio is a big change you will need more RPM to keep tires spinning making your motor work harder than it is already. it would be easier to drift a car with a higher gear ratio since at a lower MPH you are at higher RPM 4.33 GTUs diff is sweat just a comparison with a 4.10 stock diff at 80MPH you are at 3000 RPM with the 4.33 GTUs at 80 you are at 3500-3600 rpm so figure it out.
my boy has a 4.33 one in his ford V8 swap with a stock AOD and that thing drifts like a beast he spins out more than drifts but when he gets it right ohh boy
my boy has a 4.33 one in his ford V8 swap with a stock AOD and that thing drifts like a beast he spins out more than drifts but when he gets it right ohh boy
There are two reasons why you want a higher final drive gear. First is that you have more acceleration in every gear. Since our cars with stock power come nowhere near what the gear top speed is, you can increase the final drive significantly before you run into any problems. For example, you could have a 5:1 gearset in the back and you still wouldn't top out the gears. The 2nd is that at any given speed in the right gear, you're more in the power band with a higher gear, than a lower gear, allowing you to control the drifts easier with the gas pedal.
12-10-07, 11:06 AM
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I'm using a diff from an AT in my manual. Like has been mentioned before, you wouldn't want to use it for drifting. It's better for high speed driving and better gas milage. I swapped in an LSD from a GTU, but it was so worn out that it didn't make a difference. I'd recommend putting a torsen in instead. If you're going to drift, you'll prolly wear out the stock LSD clutch pack often.
12-11-07, 04:18 PM
#25
Looking at the options sheet for 88's it seems that you could get a GXL (which has LSD standard) and get an optional automatic transmission. Still, I've never heard of 3.9 LSD's on these cars. Anyone else know if any autos came limited slip 3.9 or did they get a 4.1 too?