Toyota OEM 4.5 FD Part number

[Jive Turkey]

Originally Posted by DAN_BRZ

how much did everything come to with shipping if you dont mind me asking

all the interior black pieces that i ordered cost me roughly 180$.

[Trac Toy]

Guys should read this thread. First post has some great info

http://www.ft86club.com/forums/showthread.php?t=49288

[brn12345]

You might want to also try www.jp-carparts.com/ . They have a great online part selection system and ordering is quick and easy. Shipping is direct from Japan and customer service is really good. The 4.556 ring and pinion kit from what I understand is 41201-29537.

As an added bonus they also have a part list for the GT86RCG (race version) so you can browse through that as well. Notice the front brake calipers are different!

[Captain Insano]

Originally Posted by Trac Toy

Guys should read this thread. First post has some great info

http://www.ft86club.com/forums/showthread.php?t=49288

Great minds think alike...

I posted a link to another helpful thread in post #20 of this thread, if people follow that link, not only is it helpful and answers almost all of the questions here, it also links within that thread I supplied to the link you just posted.

So anyway, no disrespect all, most of this has already been answered in some really good threads.

[JiB]

Ended up getting it through Nick @ north shore toyota NZ, fantastic service and looks after ft86club members, order to arrival was like 3 days. getting installed atm, should have it back in a couple days

[fooddude]

Originally Posted by uncivilised

you will need a spacer made up i think as the ring gear is narrower. (i thinks its from live axle toyota's)

Is this because of the 4.88's actual gear size/dimensions and will it be the same problem for any brand/manufacturer of gears?

Will an 4.88 FD from weirperformance.com also be incompatible with the stock LSD??

If yes, what are and where can we buy solutions for this so we can install a 4.88?

If there's no easy/inexpensive/available solutions yet, then I guess we're all stuck with 4.56 (or 4.7) as our shortest FD option.

I guess 4.56 is good enough... but I really want 4.88

[subwaynm]

Originally Posted by mfbmike

http://www.ft86club.com/forums/showt...ht=final+drive

Interesting read.

Sure was interesting read; I learned a lot. Great way to get more torque from our engines, but there appears to be a trade of lower top end sped but all would depend on your use of this great little car. My purpose for this car is daily driver.

For me the performance Mods that I will be doing is; Cold Air Intake, UEL Catted Header, and the Unichip. I already have the TRD Catback Exhaust and Intake. And I should get the Max out of the car and engine that I have

[uncivilised]

Originally Posted by fooddude

Is this because of the 4.88's actual gear size/dimensions and will it be the same problem for any brand/manufacturer of gears?

Will an 4.88 FD from weirperformance.com also be incompatible with the stock LSD??

If yes, what are and where can we buy solutions for this so we can install a 4.88?

If there's no easy/inexpensive/available solutions yet, then I guess we're all stuck with 4.56 (or 4.7) as our shortest FD option.

I guess 4.56 is good enough... but I really want 4.88

Im not sure with weirperformance.com 4.88 diff gears. They advertise the gears for the supra so i would assume it would fit our diffs. Best to confirm with them.

I have a set at home that I pulled out of a toyota hilux and the ring gear is narrower than the 4.55 ring gear i pulled out of a ga70 supra.

[PantsDants]

Hey guys, the 4.88 from Weir absolutely works fine, that's what I installed in my car.

In terms of what will fit in our carrier, the ring/pinion kit needs to have an 8" (205mm) diameter ring gear. There are some crazy short Toyota ratios from trucks and SUVs, but they're not the right diameter and will not work.

As for the 4.55 gears, they're from the GA70 Supra, which was not available to USDM, which is probably why North American dealers can't find the part.

[fooddude]

Originally Posted by PantsDants

Hey guys, the 4.88 from Weir absolutely works fine, that's what I installed in my car.

In terms of what will fit in our carrier, the ring/pinion kit needs to have an 8" (205mm) diameter ring gear. There are some crazy short Toyota ratios from trucks and SUVs, but they're not the right diameter and will not work.

As for the 4.55 gears, they're from the GA70 Supra, which was not available to USDM, which is probably why North American dealers can't find the part.

Nice nice! Thx for the info.

Mind giving us a review/summary/impressions if u have time?

Have you tried the 4.56, or did you go straight to the 4.88 from stock? If you tried the 4.56 before; can you tell us how much the 4.88 differs from the 4.56?

[diss7]

Sigh.
I get so sick of reading about these final drives.
They DONT give the car more power. All they do is shorten the gearing. Remember the mountain bike you had as a kid. Lets say stock car 6 speed is like only using gears 3,5,7,9,11,13. Changing the final drive in the car is like those 6 gears now being 2,4,6,8,10,12.

Get it?

Its the same reason the car feels faster in 2nd than 3rd, and 3rd to 4th.

You are making 3rd shorter, say like a 2.75, so its going to FEEL faster than 3rd was, but not quite where second was. BUT it won't go AS fast, because the gear is shorter.

Here is the easiest way to look at it.

Car has 4.1 now

If you are looking at getting 4.5, thats roughly 10% shorter. So go drive your car. Which ever gear you are in, look at the tacho, if the tach is reading 3000rpm, with a 4.5FD it will be 10% more, so 3300rpm, at that speed, in that gear.

a 4.8 would be roughly 20%.

IMO a 4.8 is too short, both for track and daily. On the track you DONT want to use 6th, as the drop from 5th to 6th is a big rpm drop. A 4.8FD will mean you'll top out 5th on the track, and have to chop into 6th.

For the street, a 4.8 means it'll suck on the open road. In 6th where it was revving 3000 - 3200 (depending on where you cruise) it'll now be 3600 - 3800.

Going to something even further like a 5.1 is even crazier. It makes 1st useless, and puts all the other gears close to where the previous gear was. 3rd will now be as short as 2nd etc. You'll just end up having a 1st gear like a van; and just use 2nd to take off.

Go on youtbue and search autofactory 86. They have a 5.1 FD in their car, on Fuji. Which was a stupid move. You see how soon down the back straight the car has to get into 6th, and you can hear the car just die in the revs.

IMO the need to make a shorter 6th gear available, that had much less RPM drop. Then you could use it as a track gear and really shorten the FD down. But this would also worsen the 6th gear cruise RPM. Which is why the 6th is where it is.

Sure you could argue its but the closer gears where you want them, and if thats what you want thats great. But you'd only do that if you only needed upto 160 - 170km/h on a track (which is slow) as thats all 5th will get to. Tyre dependant obviously.

Look at the track you are using it at. See what the max speed you're going to get is, and using ratio calcs, make sure 5th can reach that speed.

If its just for a street car, that you will use to cruise at 100 - 120km/h (60 - 70mph) get a 4.55. If you get a 4.8 it will ruin the car on the motorway. (Unless you like it singing at near 4000rpm) If you don't care about that get a 4.88.

I strees that you should do your OWN calcs. Its dependant on what you want, the compromises you are prepared to make. The wheel/tyre size you run. I run 205/40/17 tyres at the track, and I have a 4.55 sitting in my garage. However I wont put it in yet, as with that tyre and that FD I will outrun 5th at the track. So I'm waiting till I need to go to a wider tyre, which will mean taller, which will then mean using the 4.55FD, mainly to regain the gearing I have just using the smaller tyre.

Asking how a FD feels. It feels faster, in that gear. Because its shorter. But it doesnt go as fast in that gear now.

ALso, if you're getting a FD, consider underdrive pulleys. Because you are logically going to be revving the car more, so why give the ancillaries more drive than they need. Although there seems to be a massive fear/misconception of under drive pulleys on this forum, so its not even worth going there.

/rant.

[Captain Insano]

Agree, a 4.8 is pretty short for a MT. For an AT on the other hand... It is a pretty good match as those gears are longer than the MT. In the AT, even with a 4.88 6th gear cruising RPM is still reasonable.

[diss7]

Originally Posted by Captain Insano

Agree, a 4.8 is pretty short for a MT. For an AT on the other hand... It is a pretty good match as those gears are longer than the MT. In the AT, even with a 4.88 6th gear cruising RPM is still reasonable.

Probably a fair point.

But I never consider the auto when discussing anything about this car, as it saddens me greatly that the auto even exists.

[gt1680]

:I am gratefull they have an auto trans for this car, since you are leaving in a country of 4.4 something million people, try to live in a city of 12 million people with estimated 14 million cars registered and used within that city