T5 gearbox conversion

Barwick10 · 2015-01-12T08:51:19+00:00

Cut from my turbo bricks post forums.turbobricks.com/showthread.php?t=244360&highlight=australian+t5%2A Lets look at what common world class T5 boxes ar...

Dauntless

blondejay;35418 wroteThe tall 5th? 100klm/h it sits the same as my 940 aw71L 2300rpm

I consider 0.73 to be quite a tall OD ratio for a manual. For reference, Toyotas are more like 0.8 to 0.85.

2300rpm at 100km/h would be useless for me, I'd never get to use 5th. With a 4.1 diff I'd be at 2500rpm, which is still borderline. I'll investigate my options with Mal Wood, maybe a shorter 5th can be specified.

Vee_Que

Why would it be useless? You don't have a massive turbo? He has the 3.54 diff in his too and its pretty much in boost from there anyway. Brakes are there to slow you down with auto or manual. Autos engine brake if you select them if it's not worn out too.

Compared to my car with the td04 16t it's not as smooth. Also because I have a 3k high stall and 4.1 diff with a locker. He has to rev it a fair bit to lose traction too but it feels fast

deleted_user_160

I think it feels fast because, when power comes on, it comes on hard. Where as yours Alex is a lot more streetable. You almost have power instantly.

My car feel from auto aw71L to t5 BW, is chalk and cheese. The car is alive and angry if I want it.

nickm

Yes the TD05 has a large exhaust wheel..slower spool.
If the diff has not been changed it is a 3.73 in that car

Dauntless

Vee_Que;35429 wroteWhy would it be useless? You don't have a massive turbo? He has the 3.54 diff in his too and its pretty much in boost from there anyway. Brakes are there to slow you down with auto or manual. Autos engine brake if you select them if it's not worn out too.

Basically, hills and altitude. For example, the Forester needs 3rd gear and 5000rpm to hold 100km/h up some hills on the highway near me.

On my daily commute of ~29km which is ~25km highway, only ~5km would be flat enough to use gearing of 2300@100 in a 4 cylinder Volvo.

I won't clutter this thread with an argument about why I prefer manual over auto.

deleted_user_160

I don't mind. However you could start a thread, AUTO v's MANUAL relative to application.

Anyway. The way my car pulls on highway in 5th up a hill.
I have a couple on my commute from, epping:melbourne to gisbourne: macedon Rangers, every day. I do average 100+KLM a day, with 90% of that commute at 80-110klm/h

I've deliberatly checked the cars performance up these inclines I guesstimate 25-30deg incline.
Leave the car in 5th let get onto the hill and load up, then roll on the gas. And in seconds it pulls hard gaining speed.

So I don't know what your going for, shorter gear ratio, or longer? Because I personally feel it's a very usable ratio

Vee_Que

nickm;35433 wroteYes the TD05 has a large exhaust wheel..slower spool.
If the diff has not been changed it is a 3.73 in that car

My Wagon had 3.54 when I pulled it out. Manuals were 3.73 I thought.

Wow. My wifes auto impreza doesn't need that many revs on trips along the coast. It also has run out of power by 4500 and just makes noise. If it can get into boost at 2500rpm. It doesn't need more revs to hold speed .

deleted_user_160

That Impreza is boosted?

Dauntless

I don't see the point starting an auto vs manual thread, as each person has their own preferences and needs based on the type of driving they do.

Very off topic, but my Forester's EJ20 pulls best from 4000-6000.

For my wagon I'm looking for shorter gearing. More revs for a given speed. How and where you drive is very different to how and where I drive.

deleted_user_160

I understand that. That's why I said relative to application.

Yes we all drive in different scenarios, and our cars are each set differently.
Cam, ignition, plugs, adjusted to our desire. Boost etc.

What I think we are all saying is that if you were more set up like Alex, you would not notice the 500rpm you desire. As it would be nulland void in a split second.
However if you were set up like me, there would be a second delay before it come on strong. You may be pleasantly suprised

Barwick10

Need some help in regards to doing a T5 swap for the B230 that will be built shortly. Can anyone help me with regards to adapters and sourcing the right clutch?
Cheers

Vee_Que

http://ozvolvo.org/discussion/1749/australian-t5-conversions/p1

Major Ledfoot

Hi Will -

I'm also planning on going the T5 route with my B230 16V +t projects, which will be going into the 142s. This is what I've decided so far (subject to change of course):

For the adapter plate, I've decided to go with the DeeWorks kit, which is intended to adapt a Mustang V8 WC T5 with the 2.95:1 ratio 1st gear and the 7-1/8 inch, 10 spline, 24 tooth input shaft. The DeeWorks adapter kit has one advantage over the Kaplhenke Racing version in that the bellhousing doesn't need to be machined, but the Kaplhenke version is capable of adapting a TKO gearbox as well as a T5 to sit behind a B230.

Also, the standard Volvo throwout bearing and clutch fork can be used with the DeeWorks kit without any modification to either.

The BW /Tremec 1352-251 (Mustang V8) version of the T5 gearbox is rated at 330 lb/ft, and my engines (when built!) may come close to that limit . But I'd like to know what the Commodore or Falcon gearbox model numbers are, so their maximum torque ratings aren't a mystery. It would also be nice to know if t if the 13-52-085-020 input shaft (ie the 7-1/8 inch, 10 spline, 24 tooth one with the 0.668 inch tip) will fit into a Commodore or Falcon V8 WC gearbox - that combination would make for a less expensive and thus a more desirable alternative due to those boxes being more readily available in Oz than Mustang V8 units, but only if their torque ratings match those of the 1352-251 unit.

The M40 as used in the late 140s (and 240s) had a measurement of 20-7/8 inches from the transmission face to the centreline of the shift lever, so getting the T5 gear lever to fit through the original hole isn't a problem. The same measurement on a 700 is somewhat longer.

For the pilot bearing, I plan to use an SKF B65174 bearing, which has a 0.6732 ID to suit the T5 input shaft mentioned above, and a 1.379 inch outer diameter to suit the B230 crank.

As for my choice of clutch, that will also depend on the choice of flywheel - I plan to use JVAB "Super Bitchin'" units, and so I hope to be speaking with JV soon to work out which flywheel I'll get from him and which clutch he recommends. Doing all this won't be cheap, but I'm placing the priorities on longevity, reliability, and knowing exactly what parts are in there for ease of replacement when necessary, over price with this setup.

So with regards to your choice of clutch, I guess there's some things that need your consideration -

What sort of power do you want to put through the clutch?
Will the car be used as a daily driver, a weekend special, or a track monster?
Which flywheel are you going to use - flat or dog dish, or other, or custom?
Which T5 do you plan to use?

Plus your budget of course :-P

A_Volvo_Driver

Whenever I read T5 conversion I get excited, coz in my head T5 refers to a turbo 5 cylinder engine.

chavez

I have only scratched the serfice on this but am planing to do it in the near future.
I have herd that the ford t5 have better gear ratios and have a stronger first gear. And better shifter location than the Holden t5.

a friend of mine has a holden t5 behind a turbo 6 in a vh. Its putting out 300+ hp and 600nm and its still fine. And its flogged day in day out.

Ex850R

Merge with the thread on the T5 conversions already done?

Vee_Que

The shaft should br interchangeable as we've covered before. But there is already a lot of the work done.

Barwick10

Thanks for the replies guys.
The only reason im asking specifically is because its alot of information especially when im have pretty much no idea what it all means haha. Bob you seem to have a fair good understanding as to what you are doing. I have access to a T5 out of an AU falcon i believe. But apart from that im about as lost as they come.

Vee_Que

That's a good start. It will hit the fuse board though just like its pictured on that thread in jays 740T though.

deleted_user_160

guys or mods can you incorporate these two threads. might save everyone asking and replying with the same questions?
but yes, the commodore v6 box is the longest we could tell, given the dimensions of all the T5 boxes. both her in AUS and US. how ever those dimensions did not include the BA series1 Falcon T5 (before they changed to the T56)
@Vee_Que‌ believes these might in fact be a touch longer. its yet to be confirmed.

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