how strong T-series diff axles?

[Tamsey]

Sorry to hijack but while on the subject of t-series diffs, I have a rt104 Corona rally car with a standard 4.1diff in it and looking for something with a higher ratio. What do people suggest and what setup do I need.

[r3zzz4]

great forum, quick reply and the members have lots of experience. so i think, got to put the diff right away. thanx a lot
for tamsey: here's some information of t series diff parts number and ratio
41201-29406 = 3.308
41201-29287 = 3.583
41201-29227 = 3.727
41201-29237 = 3.909
41201-29197 = 4.100
41201-29207 = 4.300
41201-29626 = 4.556
41201-29637 = 4.778

[Tamsey]

Im mechanical dumb when it comes to conversions and upgrades with my car. So if I wanna put the 4.778 diff into my car, is as simple as just swapping the diff or are there other mods that need to be done?

[GT1978]

Im mechanical dumb when it comes to conversions and upgrades with my car. So if I wanna put the 4.778 diff into my car, is as simple as just swapping the diff or are there other mods that need to be done?

If you have a complete diff centre thats pretty much it. Drain oil, pull axels, remove centre, install new centre, install axels, fill with oil to level. However if you just have the ring and pinion gears then theres some buggerising with setting clearances.

[SillyCarS]

Im mechanical dumb when it comes to conversions and upgrades with my car. So if I wanna put the 4.778 diff into my car, is as simple as just swapping the diff or are there other mods that need to be done?

what kind of motor do you have? application of your car?

thats a high ratio

[strat]

My AE86 has had several thrashings at the track on relatively sticky tires(A032R and A048s) with no problems.
It all depends on how you drive it.

Im with takai on this one i ran a T series diff all year in my ip car with a kazz 2 way it was all good with 190kw 25psi boost, no axles snaped, but after some engine mods and now 215kw i smashed 3 pinion wheels but still no axle issues, its all about how yo drive! doing limiter launches and roll backs on any diff is not cool. The only time i snapped an axle on a t series was 9 years ago in the same car but 18RG + CIG locker + 032R yokos doin ripper ringi's in da hills.

[o_man_ra23]

I have eaten both spider gear teeth and crown wheel teeth with a stock 18R-G. Brett_Celicacoupe took 8 months to turn his spider gears into mush with a 16psi 1G-GTE and open centre. Both of those were 23spline open Celica diffs (all Celica T series diffs were 23 spline)

I would say with a 20V and somebody who knows how to drive, you can drive a KE70 hard all day every day on an LSD T series (even 23 spline) and not kill it, simply because you don't have much weight or torque (as already mentioned). Put a few fat homeboys in the back and thrash the car (much different to driving hard) and you will snap an axle like a twig. Of course, the axles of length you want in the 23 spline are easy to find... lets see...

xT13x series Coronas
xA4x and xA6x non IRS Celicas
xE7x and xE8x Corollas apart from late AE86 (includes T18s)

All of those cars are common as dog poo. If you don't intend on doing major revamps to the 20V, don't use a locker or welded centre, and learn to drive hard without punishing the car, then the T series should happily live with your intended use.

[takai]

Just be aware of the different bearings in some...

[Classique71]

i *believe * jamie ( 1uzfte ) had a TRD centered t series diff from an Ae86 running behind his turbo 1uz all these years before the GTR rear recently went into his Ta22 ..

It didnt break but he did mention it whined a little

[r3zzz4]

I have eaten both spider gear teeth and crown wheel teeth with a stock 18R-G. Brett_Celicacoupe took 8 months to turn his spider gears into mush with a 16psi 1G-GTE and open centre. Both of those were 23spline open Celica diffs (all Celica T series diffs were 23 spline)

I would say with a 20V and somebody who knows how to drive, you can drive a KE70 hard all day every day on an LSD T series (even 23 spline) and not kill it, simply because you don't have much weight or torque (as already mentioned). Put a few fat homeboys in the back and thrash the car (much different to driving hard) and you will snap an axle like a twig. Of course, the axles of length you want in the 23 spline are easy to find... lets see...

xT13x series Coronas
xA4x and xA6x non IRS Celicas
xE7x and xE8x Corollas apart from late AE86 (includes T18s)

All of those cars are common as dog poo. If you don't intend on doing major revamps to the 20V, don't use a locker or welded centre, and learn to drive hard without punishing the car, then the T series should happily live with your intended use.

thanx mate, i'll put that diff in my car. 'n hope it will last for ever. now the problem is putting the diff bracket from ke70 to my T series diff but i think that's no big deal to my mechanic. cheers....

[o_man_ra23]

Try a boiler maker... you need somebody who can weld quite well to swap the mounts for you.

[Turdinator]

^^ For that 6 months, what sort of driving were you doing?

Some hard street driving. But i suspect the occasional u turn was harder on the diff than anything else i did.

[Tamsey]

what kind of motor do you have? application of your car?

thats a high ratio

Its an 18rc, pretty much stock at the moment but im in the process of getting some webers for it.

Its a rally car so need more torque, its gutless down low.

I can get my hands on a 4.3 but still dont think its enough.

[o_man_ra23]

Webers won't help much. You need to do some serious internal work to get anything out of an 18RC that is worth rallying about. One of the biggest restrictions is the cam and valve size... those combined will still restrict you to about 6000rpm even with good carbies, and will make your 4.7 diff actually work against you (the 18RC has midrange torque, and thats it.)

I would suggest either going an 18R-G, or do cam, oversized valves, deck the shit out of your head (must also make compensation with timing chain tensioning), inlet and exhaust manifolds, port the crap out of it, lighten anything you can (knifedge crank will help... costly but) and get plenty of glitter to roll that turd in!! Then a 4.7 might help you. Oh, and a massively open exhaust will help once you have a really lumpy cam and big valves. Make sure you research the cam really well though, as the overlap will make a huge difference on how the motor acts.

[Tamsey]

Cant use the 18rg at present because as far as i can tell it was never homologated and was never an aussie production car with it.

I do have extractors on it but its not been ported yet.

Thats the restrictions we have in rallying.