doing 70 +/-mph at 3200 rpm...is that right with a 4.10 rear end???

[zuprax85]

ey guys, this thing is been bugging me for a while, but now i really got tired, to me with my setup the engine should be running at lower rpms, having 275/40/17 in the back (nitto 555 xtreme zr 25.59")...and it really got my thinking after i drove my other supra, 85 automatic, doing the same speed the rpm were at 2700-2800, stock tires...that final drive at the transmission makes a lot of difference??? i know the w58 5th gear is like 0.7 and the automatic is 0.6, is there is a chance that i have a 4.30 rear end in my 84 car??? when i bought it, was automatic, and then i swap the 2jz and 5speed, never touched the differential at all.

if is that much of a difference i will auto my 2jz.

[AJ]

Whats your LSD code on the data plate??

F293 = 4.10 Locking

F283 = 4.30 Locking

http://akb.norbie.net/Public/AxleList.aspx?SeriesCode=F

[zuprax85]

data plate says F293....is that normal driving rpm???? for a 4.10

[SilverMk2]

Norbie's site is probably the best for this kind of work;

http://akb.norbie.net/Public/Gearing.aspx

There is a big difference in the auto to manual overdrive like 10% difference. Just go with 3.91 or 3.73. I have 3.73s in my car with the R154 and I'm in the 2600-2800 range on the freeway.

[thor20]

Yes that is definitely normal for the 4.10 or the 4.30s. Thats where I sit at on the highway all the time

[akeem_da_dream]

yep same here, i sit at 3200 rpm going 70mph

[zuprax85]

ok thanks guys for the responses, i have a 3.73 R&P sitting on the shelf right now, i might just go ahead and send out to get it swap and calibrate, i already have the seals from Mark, does anybody has part numbers of the bearings??? thanks again.

[scottevil]

Deng I wonder how my 4.30's will do with the 2J

[ToxicFinny]

lol. i wanna swap now that im thinking about it aswell.

[zuprax85]

Deng I wonder how my 4.30's will do with the 2J

i thought i would have lower rpms having a bit taller tire, i guess i was wrong. 3.73 in the works.