Transmission teardown

[CrankyOldMan]

Originally Posted by rob323

Good luck with the C56, it's a great gearbox.

Didn't you shoehorn yours into a C151 housing? I remember reading something about that on YarisFans, but don't recall the details off hand. Did you have to do anything fancy to get the bearing preload set on the differential?

[rob323]

Originally Posted by CrankyOldMan

Didn't you shoehorn yours into a C151 housing? I remember reading something about that on YarisFans, but don't recall the details off hand. Did you have to do anything fancy to get the bearing preload set on the differential?

My gear box is - C150 bellhousing and end cap, C56 centre housing with C56 gearset (gearset is too long to fit in C150 centre housing), TRD4.7:1 final drive and TRD lsd.

Setting that preload was painful. I had an assortment of shims from 3 gearboxes and played around with combinations of them until I got it close to the factory spec. The torque wrench I used to measure this was nothing more than a foot long bar attached to an inner cv joint with a fishing scale hooked on to the bar. Dodgy at best but seems to have worked.

[CrankyOldMan]

Originally Posted by rob323

My gear box is - C150 bellhousing and end cap, C56 centre housing with C56 gearset (gearset is too long to fit in C150 centre housing), TRD4.7:1 final drive and TRD lsd.

Aah yes, that sounds familiar. What kind of issues did you have with the mounting brackets? I've got another thread around here where I documented the differences between four different gearboxes, and it can be pretty crazy even with the "same" trans model number.

Setting that preload was painful. I had an assortment of shims from 3 gearboxes and played around with combinations of them until I got it close to the factory spec. The torque wrench I used to measure this was nothing more than a foot long bar attached to an inner cv joint with a fishing scale hooked on to the bar. Dodgy at best but seems to have worked.

Thanks for sharing your setup! I've been thinking of doing the same thing, but there's a bit of calculus involved: you have to be able to account for the mass of the bar and axle socket and how it changes the load. My plan was to use a small wooden dowel and a calibrated weight from a balance style scale, but the gearbox would be in the "normal" upright position. You've got the right idea with the length markings though.

As far as shims go, I may just bite the bullet and get a few full sets since they're only a few dollars each.

[rob323]

Originally Posted by CrankyOldMan

Aah yes, that sounds familiar. What kind of issues did you have with the mounting brackets? I've got another thread around here where I documented the differences between four different gearboxes, and it can be pretty crazy even with the "same" trans model number.

Just to clarify, my C56 came from an AE101 20 valve Levin. So what I had to do may not apply to other C56 boxes from other cars.

I had to drill and tap holes into the C56 centre casing for the end gear box mount. The casting was already thickened up in that area so it was easy to do on a drill press.

The selector lever on the C56 was also different and as the Echo cables don't have any provision for adjustment, that had to be modified as well as the C150 selector didn't work int he C56 box.

Thanks for sharing your setup! I've been thinking of doing the same thing, but there's a bit of calculus involved: you have to be able to account for the mass of the bar and axle socket and how it changes the load. My plan was to use a small wooden dowel and a calibrated weight from a balance style scale, but the gearbox would be in the "normal" upright position.

That just makes it all too hard. I just used a spring type fishing scale and hooked it over the bar and worked my along until the diff would start to move with 1 pound showing on the scale. If it moved at the 8" mark, then that was a preload of 8 inch pounds. (As an aside, the bolt head on top of the bar, in the middle of that stub axle is used for putting a torque wrench on when measuring the preload on an lsd, so it's a multi purpose tool .)

[bostssgt]

thanks crankyoldman good info in this!!
thanks rob323 too

Originally Posted by rob323

.................
The selector lever on the C56 was also different and as the Echo cables don't have any provision for adjustment, that had to be modified as well as the C150 selector didn't work int he C56 box.

i'm also in the process of making a c150 - matrix c59 2005 centter housing (already have 3 bolts holes for front transmission mount in a echo) with 4age20v c56 gearset


the shifter selector itself seems to fit well in the c59 housing (exept for the c150 fork selector need to be drilled welded) and shifts all gears by hands without any problem... what was the problem in yours?

my c56 comes from a silvertop and the output shaft bearing on the belhousing side is the same as the c150(echo)

did you guys love the 4.312 final? my tough were also to run a .725 5th but
do the 1nz love that kind of short ratios or it "floats" and won't pull?
my engine is stock but i have a small td04h13t from a genesis on the shelf waiting to be tossed between the firewall and the engine

i have similar gearing in a suzuki swift 2000 north american (suzuki esteem j18 transmission with european swift sport gearing 2007+ .885 5th with 4.4 final) and its mated to a g13b dohc, this engine really like to rev