Toyspeed.org.nz Message Board

by **CAMB01** » Sat Jul 16, 2005 8:06 pm

Hey, iv fitted a 4AGZE into my AE92 FX-GT, i'm using an AE101 LSD box. My problem is that my speedo reads 20km/h faster than actual speed, i believe it is the speedo drive in the gearbox. Is there anything i can do to fix this problem?
Cheers
Cam

by **Fandango** » Sat Jul 16, 2005 10:48 pm

drive 20kph slower than the indicated speed.

by **QikStarlie** » Sun Jul 17, 2005 12:05 am

think about what you just said man....

by **Ae92typeX** » Sun Jul 17, 2005 12:07 am

Not sure of any particular places down your way, but there are companies around which can recalabrate speedos, or fit reducer gears inline to sort it.

by **CAMB01** » Sun Jul 17, 2005 12:44 am

Fandango wrote:drive 20kph slower than the indicated speed.

Funny guy.
It doesn't look good when i need to go for a WOF or when i go and get cert.

by **fatgtr** » Sun Jul 17, 2005 4:25 pm

how do you know that its reading 20kmh faster if u dont know how fast you are going? you could be travelling that fast

by **evil_si** » Sun Jul 17, 2005 5:43 pm

im not sure with toyotas but nissans have a adjustment screw in behind the speedo head for calibrating
failing that try a speedo calibration shop, i knopw some auto sparkys do it

by **RomanV** » Sun Jul 17, 2005 5:56 pm

CAMB01 wrote:Hey, iv fitted a 4AGZE into my AE92 FX-GT, i'm using an AE101 LSD box. My problem is that my speedo reads 20km/h faster than actual speed, i believe it is the speedo drive in the gearbox. Is there anything i can do to fix this problem?
Cheers
Cam

What is the outside rolling diameter of your tires comared to an AE101, If your outside diameter is different, then it will read differently.

Also I doubt it would read 20kph faster across the board, it is more than likely a percentage difference.

Find out the gear ratios of your gbox and final drive, and what size tires you have.

Calculate what speed should be showing at 3000rpm in fifth gear, and find out what percentage it is out by.

This way you could also tell if it IS showing the correct reading.

What is the 4agze transaxle, is it the C56? I found a site that had the gear ratios, but didnt show final drive. :roll:

What use is that?!

P.S. Are you sure it is wrong? Because I am sure the 4AGZE would have much longer ratios, so it would be normal for the revs to be a lot lower at a certain speed than what it was with the 4age gbox.

by **CAMB01** » Mon Jul 18, 2005 12:02 am

RomanV wrote:
CAMB01 wrote:Hey, iv fitted a 4AGZE into my AE92 FX-GT, i'm using an AE101 LSD box. My problem is that my speedo reads 20km/h faster than actual speed, i believe it is the speedo drive in the gearbox. Is there anything i can do to fix this problem?
Cheers
Cam

What is the outside rolling diameter of your tires comared to an AE101, If your outside diameter is different, then it will read differently.

Also I doubt it would read 20kph faster across the board, it is more than likely a percentage difference.

Find out the gear ratios of your gbox and final drive, and what size tires you have.

Calculate what speed should be showing at 3000rpm in fifth gear, and find out what percentage it is out by.

This way you could also tell if it IS showing the correct reading.

What is the 4agze transaxle, is it the C56? I found a site that had the gear ratios, but didnt show final drive. What use is that?!

P.S. Are you sure it is wrong? Because I am sure the 4AGZE would have much longer ratios, so it would be normal for the revs to be a lot lower at a certain speed than what it was with the 4age gbox.

Well when following my mate as he was doing 50km/h my speedo read 70km/h.

I have atm 17 205 40 wheels on my car, i am using my original dash and gauges.
Is there anyway of getting a speedo drive that will bolt into the box, as the one on the box is different to the original box that was in the car.

by **CAMB01** » Mon Jul 18, 2005 11:52 pm

by **THA SHZ** » Tue Jul 19, 2005 10:27 am

the speedo drives can be interchanged with sum others , but make sure they the sam length , but i have an ae101 lsd box with an ae92 gtz speedo drive

by **TRD Man** » Tue Jul 19, 2005 2:06 pm

Cam, You say you're using an AE101 gearbox but don't say if it's the box that came with the ZE engine.
The gearbox in your AE92 FXGT has a 4.312 final drive ratio. The box in the GTZ has a 3.944 ratio.

by **RomanV** » Tue Jul 19, 2005 2:59 pm

Yes, but doesnt a speedo drive work based on output revolutions? So final drive/gear ratio would be irrelevant.

Well thats what I thought, perhaps not.

by **CAMB01** » Wed Jul 20, 2005 11:37 pm

TRD Man wrote:Cam, You say you're using an AE101 gearbox but don't say if it's the box that came with the ZE engine.
The gearbox in your AE92 FXGT has a 4.312 final drive ratio. The box in the GTZ has a 3.944 ratio.

Yeah when i bought the engine it was in bits, i had to assemble everything, the box is out of an AE101 supercharged levin and it is an LSD.

Hey THA SHZ are the speedo drives the same for the LSD boxes? no matter what model it came out of?

by **sergei** » Wed Jul 20, 2005 11:55 pm

hmm I'm using 6speed box, defenetly different final drive, in my AE101 (c52 original), no problem with speedo (checked by GPS)
my mate is using C56 on his AE82 (original C52) still no speedo problem, you might try to swap plastic gears (if they are different) off AE101 to your old one (press them out)
I assume AE101 GZE box has digital speedo sender
but AE92 is mechanical, so you are using your old speedo drive on "new" gearbox.... even if the drive is different, if you will use AE101 plastic gear (off sender unit) then it should work..

by **CAMB01** » Thu Jul 21, 2005 7:33 pm

sergei wrote:hmm I'm using 6speed box, defenetly different final drive, in my AE101 (c52 original), no problem with speedo (checked by GPS)
my mate is using C56 on his AE82 (original C52) still no speedo problem, you might try to swap plastic gears (if they are different) off AE101 to your old one (press them out)
I assume AE101 GZE box has digital speedo sender
but AE92 is mechanical, so you are using your old speedo drive on "new" gearbox.... even if the drive is different, if you will use AE101 plastic gear (off sender unit) then it should work..

The speedo drive from on the AE101 box is in an enclosed housing that bolts to side of the box, and is driven by a shaft from the box.
I might try to get a dash speedo from an AE101 and see what happens.

by **THA SHZ** » Fri Jul 22, 2005 10:03 am

CAMB01 wrote:
Hey THA SHZ are the speedo drives the same for the LSD boxes? no matter what model it came out of?

Not sure on every one , but my ae101 lsd box was a digital speedo and i took the speedo drive out and replaced it with my ae92 gtz non lsd speedo , mechanical , and it went in fine

by **sergei** » Fri Jul 22, 2005 10:57 pm

AE101s have digital speedos....
I have not seen a speedo drive as you described... all toyota gearboxes with which I have experience with ( E/C/S and A series) have same speedo drive principle - the sender/driver is held by 1 bolt (sealed by an o-ring) on the gearbox, you can pull it out and see that it has plastic gear on the end, which is driven by big plastic ring wich sit on the diff, and it is rotated wich same speed as wheels are, and as long as the plastic gears are the same, you will get same speedo signal/drive...

by **CAMB01** » Sat Jul 23, 2005 3:03 pm

Well the speedo drive in box has no plastic gear on it

by **matt dunn** » Sat Jul 23, 2005 9:02 pm

CAMB01 wrote:Well the speedo drive in box has no plastic gear on it

Try looking at this picture( hope the link works)

The AE101 are electrical speedo, and the AE92 are mechanical, but the drives are interchangable.

Are you using the sender that wwas in your old gearbox?
If not then try using it, and if you are you may be able to fit the toothed part of the AE101 sender to your AE93 housing.

http://www.trademe.co.nz/Trade-Me-Motor ... +drive.htm

Matt

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