Changing individual gear ratios?

[RagnaCaT]

Originally Posted by Jason@SportsCar

My current ratios are:
3.545
1.904
1.474
1.208
.961

Why would I need to change 1st with that final drive change? Going to the xD FD did not require a gear change.

The XD output shaft and ring gear are different to the Yaris, they are larger you can"t drop a Yaris diff into XD tranny also one thing to look at is that the XD output shaft bearing is wider its the one that is next to the DIff so I don"t know if it cahnges the case or if it's just a different bearing.

[CrankyOldMan]

Originally Posted by RagnaCaT

The XD output shaft and ring gear are different to the Yaris, they are larger you can"t drop a Yaris diff into XD tranny also one thing to look at is that the XD output shaft bearing is wider its the one that is next to the DIff so I don"t know if it cahnges the case or if it's just a different bearing.

I'm not sure I understand what you mean by "can't drop a Yaris diff into an xD tranny". Do you mean because of the output (pinion) shaft bearing, or is there some other dimension that doesn't fit? I'm confused because I can put a Matrix and Celica diff into my Yaris transmission housing and it seems to fit just fine.

My C56 and C59 have the same pinion bearing setup: the inner bearing race is held on the pinion shaft, so the bearing in the housing has a larger center opening with multiple smaller rollers. The Yaris/xB both use the shaft itself as the inner race and have a smaller center with fewer larger rollers. My camera battery is dead, otherwise I'd take pictures to show the difference. I'll see what I can do over the weekend for some pictures.

[RagnaCaT]

Originally Posted by CrankyOldMan

I'm not sure I understand what you mean by "can't drop a Yaris diff into an xD tranny". Do you mean because of the output (pinion) shaft bearing, or is there some other dimension that doesn't fit? I'm confused because I can put a Matrix and Celica diff into my Yaris transmission housing and it seems to fit just fine.

My C56 and C59 have the same pinion bearing setup: the inner bearing race is held on the pinion shaft, so the bearing in the housing has a larger center opening with multiple smaller rollers. The Yaris/xB both use the shaft itself as the inner race and have a smaller center with fewer larger rollers. My camera battery is dead, otherwise I'd take pictures to show the difference. I'll see what I can do over the weekend for some pictures.

Yes the roller bearings sorry for poor explanation! I meant put the Diff only without the pinion shaft.
The pinion shaft of the XD is the same of the C56 & C59 thats way it uses the larger diff and I was able to source the Helical. The Xd is more like a corolla tranny than a yaris tranny.
I'm really bad at explaining things I'm the type that talks pointing at stuff with my finger, like that there and this over there.

[Jason@SportsCar]

Originally Posted by RagnaCaT

The XD output shaft and ring gear are different to the Yaris, they are larger you can"t drop a Yaris diff into XD tranny also one thing to look at is that the XD output shaft bearing is wider its the one that is next to the DIff so I don"t know if it cahnges the case or if it's just a different bearing.

With the xD FD not really being an option due to bearing/shaft size, and I want to use my OS Giken LSD, I wonder if the 3.9 FD from the C150 in the Paseo would be a better option? I think that might only be a 6 bolt. How about the 4.0 from a C52?

[CrankyOldMan]

Originally Posted by Jason@SportsCar

With the xD FD not really being an option due to bearing/shaft size, and I want to use my OS Giken LSD, I wonder if the 3.9 FD from the C150 in the Paseo would be a better option? I think that might only be a 6 bolt. How about the 4.0 from a C52?

I would stay away from the C15x series, since they're 6-bolt. Unfortunately, my research hasn't turned up anything in the C5x series with a ratio other than those on the Yaris and xB, but I've also never torn down a C52.

The output/pinion shaft bearing has the same OD, it's just a different ID. Easy to swap with a blind bearing puller. As far as overall dimensions go, the Matrix and Celica differentials seemed to fit just fine--the axial length between the taper bearings looks to be identical.

[Jason@SportsCar]

Originally Posted by CrankyOldMan

I would stay away from the C15x series, since they're 6-bolt. Unfortunately, my research hasn't turned up anything in the C5x series with a ratio other than those on the Yaris and xB, but I've also never torn down a C52.

The output/pinion shaft bearing has the same OD, it's just a different ID. Easy to swap with a blind bearing puller. As far as overall dimensions go, the Matrix and Celica differentials seemed to fit just fine--the axial length between the taper bearings looks to be identical.

Have you evaluated any of the S series boxes, like the S53 from the Celica?

[xnamerxx]

Jason you might want to look for the TRD 41201-NP100 final drive.
I believe the older AW11 MR2 and Celicas with the 4A-Fe engines used that final drive(4.058). Its a C52 so I'd imagine it would work.

[Jason@SportsCar]

Originally Posted by xnamerxx

Jason you might want to look for the TRD 41201-NP100 final drive.
I believe the older AW11 MR2 and Celicas with the 4A-Fe engines used that final drive(4.058). Its a C52 so I'd imagine it would work.

The TRD set has been listed as discontinued for years... Certainly its possible there is one out there, but good luck tracking it down.

[froger]

hello ,sorry to bother you guys but i have been successful in using the c60 celica gears in my yaris c50 ,i could only use gears three , four and five ,the shaft of the c 60 is the same as the c50 except it is a little longer (for sixth gear ) , i also used a 4.31 off a first gen xb. I have also swaped internals out of a 09 corolla c59 into a xd case to get 4.31 final and a closer 1st and 2nd gear. i didn't want to cut the frame to get a c60.