Hey guys, title pretty much says it all. It looks like my differential might be toast and I found one that comes from a same year N/A auto (mines a 5 speed) and I'm wondering if it's just a straight drop in? Any tips on the procedure? The gearing ratio should be the same right? If I need any additional parts or anything it would be great if you could give me a heads up. Thanks guys!
N/A non-lsd to LSD differential swap?
- Thread starter hey...it runs
- Start date
All na are 4.30 open unless you have a sport package which is 4.30 LSD. Seems wierd that a na would blow a diff unless loss of fluid.
All year diffs turbo na will bolt in. The auto/manual are all the same. Only difference is turbo na and year. 89+ had 3.73 for turbos.
Pre 89 turbo had 3.91.
And 1jz cars had 4.10 Torsen.
All year diffs turbo na will bolt in. The auto/manual are all the same. Only difference is turbo na and year. 89+ had 3.73 for turbos.
Pre 89 turbo had 3.91.
And 1jz cars had 4.10 Torsen.
Okay sweet thank you! And yeah, about that loss of fluid thing. It was leaking out of the passenger side axle seal and I checked it but it was fine. So I drove around for a year and got this horrible sound (sounds like a bad wheel bearing but its not) and I checked the fluid and it was a quart low. I topped it off but I think its too late now. Still drivable ATM.
There there. You can get them from Canada.
Cool design but they don't take the power and abuse too well.
Cool design but they don't take the power and abuse too well.
As hvyman said.
Oh, and ANY NA from Canada will have the limited slip. I guess they figured that we need the extra traction up here.
I had swapped in a 3.909 from an '87T into my NA before swapping in the engine and transmission. Several years before, in fact. The difference in gearing makes for the speedo/odometer being exactly 10% off, so if the speedo said 100, it meant 110. Just meant that I stuck the needle to the posted limits. No noticeable difference in power and accelleration. Fuel economy did get a bit better on the highway.
It's an option, anyway.
Oh, and ANY NA from Canada will have the limited slip. I guess they figured that we need the extra traction up here.
I had swapped in a 3.909 from an '87T into my NA before swapping in the engine and transmission. Several years before, in fact. The difference in gearing makes for the speedo/odometer being exactly 10% off, so if the speedo said 100, it meant 110. Just meant that I stuck the needle to the posted limits. No noticeable difference in power and accelleration. Fuel economy did get a bit better on the highway.
It's an option, anyway.
3.727/3.909=0.95344
So if your speedo reads 100, you'd be doing a bit over 95.
I should point out though that you could ALSO get the appropriate speedo drive gear for the replacement pumpkin, since both sets of drive gears would be available for the R154 or A340e, however the drive gear for the 4.300 is only available for the A340e, and NOT for the R154, since it would only be found in the W58. Likewise the drive gears for the 3.909 or the 3.727 are not available for the W58, which is why I put up with the speedo being wrong until I swapped in the R154.
So if your speedo reads 100, you'd be doing a bit over 95.
I should point out though that you could ALSO get the appropriate speedo drive gear for the replacement pumpkin, since both sets of drive gears would be available for the R154 or A340e, however the drive gear for the 4.300 is only available for the A340e, and NOT for the R154, since it would only be found in the W58. Likewise the drive gears for the 3.909 or the 3.727 are not available for the W58, which is why I put up with the speedo being wrong until I swapped in the R154.
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Turbo Habanero;1831316 said:
I bought mine off a local guy (he actually posts here), and I've seen a few floating around here and there; just check the for sale section often..
so i have a question as well does the diff just drop right now or what stuff do i need to move out of the way to bolt my new pumpkin up? i have an 86 supra came with open diff 
putting a turbo lsd in
putting a turbo lsd inThe NA Supras did come with LSDs. It was an option in the USA, but standard in Canada. This is you best bet if you can find one, since it will be the correct 4.300:1 ratio.
I swapped in a 3.909:1 from an '87T into my '89NA. It bolts right in, bolts up to the axles, no hassle making it fit. Just remember that your speedometer/odometer will be 10% out, so if your speedo says you're doing 60, you're doing 66. (It's exactly +10% for the 3.909:1) You can't switch the transmission speedo drive gear for a 5 speed, since the NA 5 speed is a W58, and the turbo would be an R154. You CAN switch the speedo gear if it's an auto, since both would be the A340E.
I swapped in a 3.909:1 from an '87T into my '89NA. It bolts right in, bolts up to the axles, no hassle making it fit. Just remember that your speedometer/odometer will be 10% out, so if your speedo says you're doing 60, you're doing 66. (It's exactly +10% for the 3.909:1) You can't switch the transmission speedo drive gear for a 5 speed, since the NA 5 speed is a W58, and the turbo would be an R154. You CAN switch the speedo gear if it's an auto, since both would be the A340E.
For the record, the limited slip was an option on the 7MGE engine, and standard with the 7MGE sport package.
go to my profile or use the search bar, i created a thread exactly like this. check your vin and that will tell you if you have an lsd. if you have a sport tms button on your center console odds are you have an lsd and its just got worn shims
RazoE;1913012 said:
Yep. 3 of the 4 7MGE's I had came with LSD, and none were the sport package.
I pulled one a couple of weeks ago from a junk yard, and they wanted $168 for it. Since I was just getting it to play around with it I didn't want to spend that much for it. I read the price sheet at the junk yard before pulling it and thought I was going to pay $58 for it. I put it back under the car I pulled it from and left. It was a 4.30:1 LSD out of an n/a.