Rearend???

h8z2luze · 08-23-2006, 07:11 AM

I was just wondering what kind of rearend is in the mk3 supras? Is it limited slip or posi or neither? Anyone know the gear ratios???? Thanks.

suprasforlife · 08-23-2006, 10:06 AM

There are several different gear ratio's and some have lsd rearends and others are open(no lsd, no posi). The way you tell is by the code that is on the tag in the drvers door jam. Look at the code that begins with G.
It should be something like G305.
The G is for the diff size so G=8inch diff(all Supras have the 8inch)
The 1st two numbers are the ratio.
They are as follows.
28=4.3
30=3.9
31=3.7
The last number tells if it is open or lsd. If it is an odd number it is lsd, if it is even, it is open.
So G305 is an 8 inch rearend housing with 3.9 gear ratio and is lsd.
Hope this answers your question. I have never heard of a Supra with a true posi in it, would take away from the cars cornering ability to much. There might be more ratio's but these are all I know of.

newbsupra · 08-23-2006, 10:29 PM

i dont have a code on my car? 86.5 NA

damdog05 · 08-23-2006, 10:44 PM

my 86.5 has an lsd, but it doesnt mean yours does. take a look at your rear end. mine said right on it somewhere that it was lsd.

newbsupra · 08-23-2006, 10:47 PM

well, when i spin around corners, or squeel the tires, there is two tire marks, which would probibly mean LSD?

suprasforlife · 08-23-2006, 11:47 PM

Yes 2 tires spinning is lsd, and the tag is under your hood on the firewall, I forgot that they did not put the stickers in until 1989, it's a big metal tag, you can't miss it.

Dejvid1785 · 08-24-2006, 04:32 PM

Just lift your rear end up and spin the back wheels if they both spin in the same direction you have lsd. If you spin them and they go seperate ways then you don't have lsd. It also says on the differential LSD oil only which means you have an LSD.

grygst76 · 08-24-2006, 05:04 PM

sorry to jack....

some idiot peeled the sticker off my door, I have an 89 turbo and I do not see the lsd tag on the rear either is there anywhere else they put the id??

suprasforlife · 08-25-2006, 12:08 AM

I don't know of any other place on the car other that the door jam and on the rearend itself. I remember seeing somewhere in my forum travels that one guy found his sticker on the inside of the car in the hatch area, but if memory serves me correct it was under the interior pannels, I cannot say if that is where the factory put it or if someone just moved it there because they painted it or something. What gear are you in at 75 mph and what rpm are you at? Tell me that and I might be able to tell you what you have for a gear ratio. It's really pretty simple, if you are doing 75 in 5th gear and are at 4,000 rmp or so you have low gears, if you are only at 2,500rpm or so then you have high gears or long gears as some people call them.

grygst76 · 08-25-2006, 01:03 AM

Quote:

Originally Posted by suprasforlife

I don't know of any other place on the car other that the door jam and on the rearend itself. I remember seeing somewhere in my forum travels that one guy found his sticker on the inside of the car in the hatch area, but if memory serves me correct it was under the interior pannels, I cannot say if that is where the factory put it or if someone just moved it there because they painted it or something. What gear are you in at 75 mph and what rpm are you at? Tell me that and I might be able to tell you what you have for a gear ratio. It's really pretty simple, if you are doing 75 in 5th gear and are at 4,000 rmp or so you have low gears, if you are only at 2,500rpm or so then you have high gears or long gears as some people call them.

at 70 I am at 2100 rpms in 5th. 75 I think 2850

08-23-2006, 07:11 AM	#1
h8z2luze 12psi boost Join Date: May 2006 Location: Nor*Cal Posts: 338	Rearend??? I was just wondering what kind of rearend is in the mk3 supras? Is it limited slip or posi or neither? Anyone know the gear ratios???? Thanks. __________________ 1989 Supra 7MGE MK3 5-speed project... http://www.cardomain.com/ride/2385505

08-23-2006, 10:44 PM	#4
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	my 86.5 has an lsd, but it doesnt mean yours does. take a look at your rear end. mine said right on it somewhere that it was lsd. __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

08-24-2006, 04:32 PM	#7
Dejvid1785 3" Exhaust Join Date: Aug 2005 Posts: 193	Just lift your rear end up and spin the back wheels if they both spin in the same direction you have lsd. If you spin them and they go seperate ways then you don't have lsd. It also says on the differential LSD oil only which means you have an LSD. __________________ 88 Targa: Exhaust, Headers, Intake

08-24-2006, 05:04 PM	#8
grygst76 3" Exhaust Join Date: Dec 2005 Location: Springfield, Massachusetts Posts: 87	sorry to jack.... some idiot peeled the sticker off my door, I have an 89 turbo and I do not see the lsd tag on the rear either is there anywhere else they put the id?? Last edited by grygst76; 08-24-2006 at 05:10 PM.

08-25-2006, 12:08 AM	#9
suprasforlife 3" Exhaust Join Date: Jun 2006 Location: Montana Posts: 71	I don't know of any other place on the car other that the door jam and on the rearend itself. I remember seeing somewhere in my forum travels that one guy found his sticker on the inside of the car in the hatch area, but if memory serves me correct it was under the interior pannels, I cannot say if that is where the factory put it or if someone just moved it there because they painted it or something. What gear are you in at 75 mph and what rpm are you at? Tell me that and I might be able to tell you what you have for a gear ratio. It's really pretty simple, if you are doing 75 in 5th gear and are at 4,000 rmp or so you have low gears, if you are only at 2,500rpm or so then you have high gears or long gears as some people call them. Last edited by suprasforlife; 08-25-2006 at 12:10 AM.

08-23-2006, 10:06 AM	#2
suprasforlife 3" Exhaust Join Date: Jun 2006 Location: Montana Posts: 71	There are several different gear ratio's and some have lsd rearends and others are open(no lsd, no posi). The way you tell is by the code that is on the tag in the drvers door jam. Look at the code that begins with G. It should be something like G305. The G is for the diff size so G=8inch diff(all Supras have the 8inch) The 1st two numbers are the ratio. They are as follows. 28=4.3 30=3.9 31=3.7 The last number tells if it is open or lsd. If it is an odd number it is lsd, if it is even, it is open. So G305 is an 8 inch rearend housing with 3.9 gear ratio and is lsd. Hope this answers your question. I have never heard of a Supra with a true posi in it, would take away from the cars cornering ability to much. There might be more ratio's but these are all I know of.

08-23-2006, 10:29 PM	#3
newbsupra 3" Exhaust Join Date: May 2006 Location: Sask/Canada Posts: 238	i dont have a code on my car? 86.5 NA

08-23-2006, 10:47 PM	#5
newbsupra 3" Exhaust Join Date: May 2006 Location: Sask/Canada Posts: 238	well, when i spin around corners, or squeel the tires, there is two tire marks, which would probibly mean LSD?

08-23-2006, 11:47 PM	#6
suprasforlife 3" Exhaust Join Date: Jun 2006 Location: Montana Posts: 71	Yes 2 tires spinning is lsd, and the tag is under your hood on the firewall, I forgot that they did not put the stickers in until 1989, it's a big metal tag, you can't miss it.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MK4 Rearend Gearing?	Sub-Zero	MKIV Supra	0	10-12-2008 12:01 AM