New SG Sequential Holinger Engineering 6 speed Tranny for FRS/BRZ cool!

[mike the snake]

I've been reading up on gearboxes and the R154 looks to me like a very good candidate as long as you're willing to live with 5 speeds.

For big power turbo applications it might even be better than 6 speeds. I haven't checked the gear spacing, but I know 6th on our OEM boxes is just an overdrive that I don't think would be used at most tracks.

Originally Posted by cdrazic93

Do you have anymore details? Be curious to know if they had just lemons or the auto isnt being pushed nearly as hard as the manual

If its possible I wonder if an R154 swap would be cheaper than an auto with the full upgrades

[cdrazic93]

Originally Posted by mike the snake

I've been reading up on gearboxes and the R154 looks to me like a very good candidate as long as you're willing to live with 5 speeds.

For big power turbo applications it might even be better than 6 speeds. I haven't checked the gear spacing, but I know 6th on our OEM boxes is just an overdrive that I don't think would be used at most tracks.

I would get a rebuild on an R154 anyway, most rebuilders say the thrust washers are what most fail on since they're cast.
For $1600 the rebuild from jacks transmission looks to be a good working over. Total all in $3-3500 for a beefed up R154? Yes please.

http://www.jackstransmissions.com/pr...e-3-supra-r154

First- 3.251:1
Second- 1.955:1
Third- 1.310:1
Fourth- 1.000:1
Fifth- 0.753:1

Thats your spacing

[Sideways&Smiling]

Originally Posted by mike the snake

I've been reading up on gearboxes and the R154 looks to me like a very good candidate as long as you're willing to live with 5 speeds.

For big power turbo applications it might even be better than 6 speeds. I haven't checked the gear spacing, but I know 6th on our OEM boxes is just an overdrive that I don't think would be used at most tracks.

R154s aren't really all that strong, honestly. A lot of people have broken even beefed up Marlin Crawler R154s.

[cdrazic93]

Originally Posted by Sideways&Smiling

R154s aren't really all that strong, honestly. A lot of people have broken even beefed up Marlin Crawler R154s.

Then whats an alternative that wont cost atleast half the price of the car?
That can also be subjecitve. Sure a 1200 hp big single big block would put a beefed up V160 in its place.

If there are reports of breaking sub 400wtq (which would be rare around here). Then its weak.

[cdrazic93]

The only things i can think of would be a T-56, 6060, or T-56 Magnum. Those are still >$4,000 just for the unit, not to mention the bell housing, install and crap.

[Sideways&Smiling]

Originally Posted by cdrazic93

Then whats an alternative that wont cost atleast half the price of the car?
That can also be subjecitve. Sure a 1200 hp big single big block would put a beefed up V160 in its place.

If there are reports of breaking sub 400wtq (which would be rare around here). Then its weak.

It is what it is. People with S2000s, RX7s, Silvias/240sxs, etc. break transmissions at that power level (or less) too.

For most of these small, light cars, there are no cheap options. It's either Getrag V160/161, Tremec Magnum (which I haven't really seen being used with small displacement, high reving engines, but is the cheapest and probably the strongest option), or $$$$$$ aftermarket GForce/Quaife/Holinger/Hewland/etc. dogbox/sequential racing transmissions.

I know some 240sx SR20DET guys use 300zx transmissions or 350z/370z transmissions, but those have issues too...

This is one thing that has been making me think about going to an LS swap for my 240sx.... the price and availability of a strong, smooth shifting transmission in the Tremec Magnum...

[cdrazic93]

The only problem is, do the Tremec spin to 7500 reliably?












**** it, who wants an auto 3 speed that will support anything under a jet engine?

[Sideways&Smiling]

Originally Posted by themadscientist

No, I'd do $20,000 worth of suspension, brake, drive train and engine mods before I would waste it on that transmission, but, realistically, I wouldn't even do that much, maybe $5,000.

I would put that transmission in my GT-R if I folded bank like that, but right now it's all about getting it back on the road.

If I could afford a GTR I would build and boost AN S2000 or FRS to 700+ hp with this transmission instead.

DAT TIME ATTACK :P

[mike the snake]

Reading in the Supra forums, the R154 is said to be good for 700hp and 500-550 torque before problems occur, and this can be minimized by replacing a thrust washer. Beyond this and they recommend the 160/161.

Our little flat fours are not torque monsters. I bet the R154 would be pretty indestructable hooked up to one of our 86's.

Realistically, the FA20, even in big-power form, won't be hitting those numbers, for the most part. Those that go really crazy already have the cheddar to go for the 160 trans and 8.8 diff.

[Reaper]

So I've posted this in 4 transmission threads already but here goes

V160 swap 8-10k $ (6k transmission and 2+ for swap kit) for a transmission that isn't even made anymore!

Holinger/quaife 18-20k (I got actual quotes) $ to hold 270wtq unless you upgrade to the sg3 transmission for more $

Tremec tko(the magnum won't fit) 5.5k $ but it won't shift at high rpm. Liberty gear says they can fix that but it's a pretty big design limitation. It's also a 5 speed.

I've tried cryo and heat treatment and broke that too. The factory gears are as strong as they can be for their size.

If we convert to dog engagement we save a little space and can make the gears slightly stronger but the two companies that are willing to do it want 5.5k $and 6.5k $ but it won't be much stronger and it's a pain to drive a dog box on the street.

[Sideways&Smiling]

Originally Posted by Reaper

So I've posted this in 4 transmission threads already but here goes

V160 swap 8-10k $ (6k transmission and 2+ for swap kit) for a transmission that isn't even made anymore!

Holinger/quaife 18-20k (I got actual quotes) $ to hold 270wtq unless you upgrade to the sg3 transmission for more $

Tremec tko(the magnum won't fit) 5.5k $ but it won't shift at high rpm. Liberty gear says they can fix that but it's a pretty big design limitation. It's also a 5 speed.

I've tried cryo and heat treatment and broke that too. The factory gears are as strong as they can be for their size.

If we convert to dog engagement we save a little space and can make the gears slightly stronger but the two companies that are willing to do it want 5.5k $and 6.5k $ but it won't be much stronger and it's a pain to drive a dog box on the street.

Why does the Magnum not fit? I know it fits in 240s and RX7s.

[JP]

you wont break a stock R154 with an FA20. They're not a nice shifting box and will require massaging of the trans tunnel to fit.


a brand new R154 is ~8K, but can be had for a LOT less if you shop around. eg: http://www.jzx100.com/forum/topic/97...#axzz3KuNVDGrM


I'd personally try to make the RA63 from the IS250 fit, but that would probably also require massaging the tunnel, side by side with an 86 box here: http://www.turbofast.com.au/img/RA63-TL70_1.jpg

[cdrazic93]

Originally Posted by Sideways&Smiling

Why does the Magnum not fit? I know it fits in 240s and RX7s.

why do I get the feeling that those tunnels are huge and can fit anything except an allison.

[abraxis]

Originally Posted by cdrazic93

Do you have anymore details? Be curious to know if they had just lemons or the auto isnt being pushed nearly as hard as the manual

Based on other auto threads about cooling, I'd guess heat was a big factor. I'd like to know if they were running proper coolers and other specifics.