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how do i identify my diff ratios

Tech Talk for Cruiser owners.

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how do i identify my diff ratios

Post by kegz »

hey everyone how can i identify my diff ratios. it is a ln65 diesel.
also while im at it does anyone no if i could put a celica box straight in using my bellhousing. and bolt the transfer where the extensioin housing or whatever they have wold be cheers
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Post by jimmyb »

divide ring gear tooth number by pinion tooth number.
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ToNkA
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Re: how do i identify my diff ratios

Post by ToNkA »

kegz wrote:hey everyone how can i identify my diff ratios. it is a ln65 diesel.
also while im at it does anyone no if i could put a celica box straight in using my bellhousing. and bolt the transfer where the extensioin housing or whatever they have wold be cheers
They would be 4.56 from factory.

But the only sure way is to count the teeth like suggested.
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Post by HEY CHARGER »

Or without removing the centre , jack wheels of the ground and count how many turns of the driveshaft it takes to complete one complete turn of the wheel.

Theres your ratio eg 4.1 turns of the driveshaft to 1 turn of the wheel = 4.1 to 1
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Post by +dj_hansen+ »

HEY CHARGER wrote:Or without removing the centre , jack wheels of the ground and count how many turns of the driveshaft it takes to complete one complete turn of the wheel.

Theres your ratio eg 4.1 turns of the driveshaft to 1 turn of the wheel = 4.1 to 1
Place a chalk mark on the wheel and on the ground to make life easier when doing this...

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Post by bigpat »

Check the code on the firewall plate. Look for a G###. Mine is a G145, 14 being 4.88:1 ratio, the 5 meaning 4 pinion LSD.

Just go to http://www.off-road.com/toyota/tech/other/4_axles.html

Easy as......
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Post by ToNkA »

bigpat wrote:Check the code on the firewall plate. Look for a G###. Mine is a G145, 14 being 4.88:1 ratio, the 5 meaning 4 pinion LSD.

Just go to http://www.off-road.com/toyota/tech/other/4_axles.html

Easy as......
Thats if you know its the same diff as what was in it from factory...
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Post by kegz »

it is still the original dif because i no the history of this vehicle and on the plate it says g252??
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Post by v840 »

According to this site, http://www.brian894x4.com/Gearratiosanddiffs.html yours' is a 8", 4.556, 2 pinion, open diff.

As for bolting the celica box up, its my understanding that the celica boxes were pretty weak anyway so I would probably try and find a later model hilux one as it would already have the provision for the transfer case and have a better chance of fitting your bell housing. Or you could go a supra box, adapter kits are readily available but might be exxy.
Good luck.
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Post by RED60 »

Seem to remember the jack up n turn method doesn't work because of planetry gears cummin into play. This system will work if u have locker diff engaged because planetries are out of action. :cool:
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