swapping diff centers

[PSI3y]

i have heard rumours of being able to swap front and back diffs in an 85 lux. is this true? i have done a search but not much luck. are there any other cars which run the same center but at different ratios as i am also thinking about regearing after the engine conversion and dual transfer case setup. at the moment it has the 4.88 so something to reduce engine rpm at 100kph would be nice. maybe down to the low 4's? there is also a budget to adhere to so no rebuilds. cheers

[Mytqik]

The centres are the same f/b on the hilux. The same applies for the early (85-92) cruiser utes. However in 92 they changed the front diff to a lighter duty unit from the hilux, but they obvisoly have the same ratio.

As for ratio options, you may want to source the 4.1:1 ratios out of a diesel hilux for the same year as yours. If that fails, you can buy a wide range replacement ratio ring gear & pinions, from various outlets.

[My Lil Lux]

4.3's should be easy to source, 4.1's out of the front of an 80 series cruise will fit, I'm running two 4.6's out of a gen 2 lux in 92 model, they are reversible, can't use out of IFS fronts different size.

What are you doin with the 4.88's

[RUFF]

The centres are the same f/b on the hilux. The same applies for the early (85-92) cruiser utes. However in 92 they changed the front diff to a lighter duty unit from the hilux, but they obvisoly have the same ratio.

As for ratio options, you may want to source the 4.1:1 ratios out of a diesel hilux for the same year as yours. If that fails, you can buy a wide range replacement ratio ring gear & pinions, from various outlets.

The 92 on Cruiser does not use a Hilux Centre in the front.

It is the same size as a hilux centre and yes it will bolt into a hilux housing but it is totaly a Cruiser Centre. No hilux ever came factory with this centre.

[Bluey]

The same applies for the early (85-92) cruiser utes

i was going to post up similar thread myself, but ...

i just need to know if my diff centres from 73 series cruiser will swap front and back. or how hard is it to relace oil slinger/oil seal on diff in place, my manual reckons flange nut tightened to 181-325 ft/lb



sorry about the hijack PSI3y



Lance

[RUFF]

You can replace the pinion seal in place. Just undo the nut remove the flange and replace the seal. Make sure when you refit the nut you dont do it up anymore than it was before you undid it. Its easy to tell because the nut gets peaned over in one spot to stop it from comming undone.

Just inspect the flange while you have it off as these are prone to wearing a grove where the seal runs on it. fitting a speedy sleve is the easy fix otherwise a replacement flange can be bought from most diff shops for around$40-$50 but this may require someone with a little more knowledge to re-tighten the pinion nut as the set up can change with a new flange.

[Bluey]

thanks ruff, will do it on vehicle then. does that torque setting sound feasible then or a typo? not that i have torque wrench yet anyway

[Gribble]

The same applies for the early (85-92) cruiser utes

i was going to post up similar thread myself, but ...

i just need to know if my diff centres from 73 series cruiser will swap front and back. or how hard is it to relace oil slinger/oil seal on diff in place, my manual reckons flange nut tightened to 181-325 ft/lb



sorry about the hijack PSI3y



Lance

Thats a massive variation in torque!
it would be more like 180-200Nm for a pinion shaft.

Just do what ruff said, my method is a touch different, but there is nothing wrong with his and its easier.

[Bluey]

The same applies for the early (85-92) cruiser utes

i was going to post up similar thread myself, but ...

i just need to know if my diff centres from 73 series cruiser will swap front and back. or how hard is it to relace oil slinger/oil seal on diff in place, my manual reckons flange nut tightened to 181-325 ft/lb



sorry about the hijack PSI3y



Lance

Thats a massive variation in torque!
it would be more like 180-200Nm for a pinion shaft.

Just do what ruff said, my method is a touch different, but there is nothing wrong with his and its easier.

yeah, not wrong. always figured that one was a misprint, haven't needed to work on it before so wasn't sure which end of range was right.

thanks fellas

[Bush65]

thanks ruff, will do it on vehicle then. does that torque setting sound feasible then or a typo? not that i have torque wrench yet anyway

I can't comment on the validity of the stated torque range. But you need to do what Ruff said - not go by torque figures unless you renew the crush tube between pinion bearings.

[RUFF]

thanks ruff, will do it on vehicle then. does that torque setting sound feasible then or a typo? not that i have torque wrench yet anyway

I can't comment on the validity of the stated torque range. But you need to do what Ruff said - not go by torque figures unless you renew the crush tube between pinion bearings.

This is true John i didnt even think to mention that.

[4sum4]

i have heard rumours of being able to swap front and back diffs in an 85 lux. is this true? i have done a search but not much luck. are there any other cars which run the same center but at different ratios as i am also thinking about regearing after the engine conversion and dual transfer case setup. at the moment it has the 4.88 so something to reduce engine rpm at 100kph would be nice. maybe down to the low 4's? there is also a budget to adhere to so no rebuilds. cheers

What size tyres are you running and is it daily driver or just trail rig

[PSI3y]

just 31's for now but when they wear out i will be getting some 32's maybe. It is a daily driver for me at the moment so i do a few freeway runs. it needs it to be a bit more of a tourer. with the new engine and these diff ratios it is a little annoying. 4.3's sound like the go to me. thanks for the ideas

[dumbdunce]

thanks ruff, will do it on vehicle then. does that torque setting sound feasible then or a typo? not that i have torque wrench yet anyway

the torque range is correct but it means nothing if you don't replace the collapsible spacer and test the pinion bearing preload. do like Ruff said and use the same nut, and do it up to where it was done up to before. if the pinion shaft still has slop at that stage then the bearings are past their use by and the diff needs overhauling.

disclaimer: no warranty: sometimes you can squeeze a bit more life out of the pinion bearings by doing up the nut to restore the pinion bearing preload to close to specification, but you need to know what you're feeling for when you do it up.

cheers

[4sum4]

just 31's for now but when they wear out i will be getting some 32's maybe. It is a daily driver for me at the moment so i do a few freeway runs. it needs it to be a bit more of a tourer. with the new engine and these diff ratios it is a little annoying. 4.3's sound like the go to me. thanks for the ideas

Not sure what engine or gearbox your running but if your got dualies and only got 31`s and looking at 32`s maybe should consider some more mods with suspension or body and get some bigger meets