Im puting together a jig to make a bellhousing to mate the T50 toyota box to the A series engine for my coupe. This got me thinking!

I was wondering what the most common datto(or other) 5 speed was to maybe make a cheepish 5 spd adaptor to make a conversion more affordable for people?
It wouldnt be too flash, just two bellhousings cut and shut.

It would be good if it could fit the manual tunnel too.

Bluebird 5 speed?
BMW getrag?
Ca Stumpy?

Over to you!

Pick something commonly available in large numbers

CA or SR boxes would be plentiful

Shame the T5 is abit heavy for the job ... plenty of those about

About time Simon thought youd never ask :)
Its the best thing on this forum for ages. Everyman and his dog has this problem
now and its only gonna get worse. The t50 series is dead, cannot be found at wreckers
no matter what. Thats coming from a wrecker rat.

The most common although not the best is the Stumpy box
but the W series box from toyota hilux is avail new and cheap.

You wont go wrong with the stumpy though as there will be many
that want to upgrade from the complicated SR to an A series :)

Do the CA and SR boxes have the same length input shaft and same spline?

Are they interchangable? (bolt pattern)

Do they have a removable bellhousing?


Sorry, im not up with these things!

Im going to do mine today. I`ll see how much work it is.

I am currently making an adaptor to go from a Dellow T50 bellhousing to a Getrag 262, I am using the Dellow bellhousing because all of the clutch work is already done and all that is needed is an adaptor from the Dellow to the Getrag once the input shaft has been positioned.

It's on my 'to do ' list to do the same for the Dellow - W series box.

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  Getrag 262 CR 1-1 fifth..jpg (68.74 KB)

what about some sort of sandwich plate to go from steel case celica to a series auto bellhousing. Like you said the clutch pivot ball is the problem that needs sorting. My friend has done it but how easy it would be to do in DIY kit form i'm not sure.

Steel case celica is now as rare a T series so thats out.

Removable RWD bellhousing gearboxes are hard to come by now.

The only one still in production and attainable is the Toyota Hilux rwd
and Hiace (side shift) however ratios are atrocious.

The rest are not so good but better than 4 speeds:
(in order of most commonly found and available)

Mitsubishi sigma rwd Astron matched transmission BW only not jap box
http://www.sigma-galant.com/viewtopic.php?f=42&t=3569
This one would be the best as its avail in the GJ sigma and the model
is Borg-Warner - Model 0507. The bellhousing is close to the auto
A series bellhousing for matching up to.


BMW getrag (2 kinds one removable bellhousing differences in my earlier threads)
Ford Falcon T5 (sought after by all bogons both holden and ford fans)

W series (pinched and sold before going out to wreckers as some Arabs and other
africans dealers have contract with wreckers) however available new from Rollin
Imports and some other Jap auto suppliers.

T50 and steel case W50 (Toyota fans, Oz clubbies, Morris, holden fans and Dellows kit owners of other kinds so havent seen these boxes in wreckrs for at least 4 years now and Im at 2-4 different leading wreckers a week)

South Africa is the other option but apparently expensive there too and sought after.

Final choice for road: Borg warner from Sigmas.
Final choice for road and track: Getrag, W series

Unitary Cut and shut RWD options: 1. Mazda 323, 626, 929, B series utes RWD (929 is considered close ratio as it has the best ratios by far and light equivalent to T50 but stronger), Nissan Stumpy 5 speed (heavy but common as bleached whores), Sigma and Gemini Jap boxes (As heavy as Stumpy and as common , better one is the Isuzu Gemini/Rodeo as its based on the W series or Aisan)


Hope that covers most questions. Ive been thinking of this for many years of slumming wrecking yards and apart from the super rare "race close ratio" triumph post 1975 dolomite
gearbox the rest are above.

Thanks D,

Lemonhead, Could i get you to measure the length of the input shaft on the Getrag from the bellhousing mounting flange to the tip?
If its long enough, it could be adapted with a plate using the A series auto bellhousing. The input shaft would have to be ground and a bit of work to sort the clutch stuff. It would be a very tough box tho.

Do you know if the normal overdrive box has the same input shaft and bolt patern where the bellhousing bolts to it?

Thanks

im pretty sure SR boxes will need transmttion tunnel modifications but would be more then enough to handle the angriest A series

Pretty much all boxes will need trans mods except some auto models.

Simon forgot to mention the SR box in RWD is a little precious as they do get thrashed.
More common is the miata mx5 box, the 6 sp is only 5kg heavier or 42kg compared to 37kg
for the 5 speed version.

This week its 50% off all gboxes at Pickafart so ill be in there getting a stumpy for
my ca but will see if I can get a getrag for you if time permits.
I think all the removable bellhousing 265 series getrags have the same pattern except for the late ones from Volvos, bimmer, jags and other cars.
http://www.tigersunited.com/techtips/ ... tRag/pt-DWhiteGetRag1.asp
The ratios are not as good as i originally thought ;l( looks like the T5 is the winner.

Getrag 265 (Opel)
1) 3.822:1
2) 2.199:1
3) 1.398:1
4) 1.0:1
5) 0.813:1
R) 3.705:1

N.B. Getrag 240 same except 1.336:1 3rd gear.

M47
1) 4.03:1
2) 2.16:1
3) 1.37:1
4) 1.0:1
5) 0.82:1 (up to '85) then 0.83:1
R) 3.68:1

M51
1) 3.99:1
2) 2.58:1
3) 1.77:1
4) 1.27:1
5) 1.0:1
R) 4.54:1

Getrag 262CR
1) 3.717:1
2) 2.403:1
3) 1.766:1
4) 1.263:1
5) 1.0:1

T5 (Sierra Cosworth)
1) 2.915:1
2) 1.932:1
3) 1.323:1
4) 1.0:1
5) 0.795:1

http://forums.turbobricks.com/showthread.php?t=186065

This would be the T5 Id be interested in, note the shift position

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  t5.jpg (102.87 KB)