Speedo driven gear installation

[Dachande]

I'm trying to put the housing back in (R154) and it slides in up until the O ring and then wont budge. I have it aligned with the metal tab that the bolt slides through, but it just won't go in the rest of the way. Is there something I'm not doing, or does it just need to be strongarmed back in?

 

[gofastgeorge]

Make sure you have:
A) the correct O-ring.
B) lube it with some grease.
C) turn the gear with a screwdriver as you push it in.

 

[Dachande]

After a lot more cursing I took it out and compared it to the one that came out of it. The one that came out of it (on the right) is noticeably smaller in diameter. The white one is the one I bought from Toyota (part number: 33403-19235 which came with the new O-ring and clip)

Was I sold the wrong gear?

 

[gofastgeorge]

That will do it also.
Did you intend to change the speedo drive ratio because of a rear end ratio change ?
If not, yes, they gave you the wrong gear.

 

[Dachande]

Nope, my speedo quit working so I narrowed it down to the gear. I just wanted it working again. Did they give me one for an auto? From what I read the W58 and R154 use the same gear? My car was originally NA so I'm assuming it has the 4.30 rearend.

 

[FIL]

How much did yours cost? I just got quoted $700 for a speedo drive gear for an R154... Thought it was a little over the top, but haven't looked into it any more since then...

 

[gofastgeorge]

What was the tooth count on the old gear?
And the new gear ?

I may have some info saved on what they are for, but I will have to dig a little.

 

[Moy]

How much did yours cost? I just got quoted $700 for a speedo drive gear for an R154... Thought it was a little over the top, but haven't looked into it any more since then...

The drive gear or driven gear? Meaning the gear that is inside the transmission or the gear that the speedometer cable plugs into? If it's the driven gear (inserted through the side of the transmission), someone was jerking you around as mine cost about $20 USD.

If it was the gear that sits on the output shaft inside the transmission, then I'm honestly not sure on what that costs

 

[Dachande]

What was the tooth count on the old gear?
And the new gear ?

I may have some info saved on what they are for, but I will have to dig a little.

The new one has 35 teeth, and I want to say that the old one has close to 30. I appreciate the help.

 

[gofastgeorge]

OK, the gear you bought is for a 4.30 diff ratio (35 tooth).
And it will not mate with the drive gear in the trany of a car that came with the 3.90 rear end ratio.

You need p/n 33403-29125 (32 tooth)

Now, if you have the 3.70 rear end, your on your own,
as I can find no MkIII listed in my downloaded Toydiy info, that ever had a 3.70 rear end,
87 through 92, turbo, non-turbo, 5-spd, auto.
None........
(I am not saying they don't exist, as a guy here in town has a new set in stock)

If you give me your trans/axle code from the car, I can look up the gear ratio.

 

[IJ.]

Correct me if I'm wrong but 4.30 is NA only ie: W58?

I "thought" 154's use a different driven gear?

Paging Jeff Lange....

 

[Dachande]

My car is an 89 and originally NA/Auto. I did not swap the rear end. It's now GTE/R154, except I'm not sure what year the R154 came out of. I'm fairly positive that the one I pulled out was 32 teeth. I put it back in to keep it from losing more oil, but I'll pull it back out tomorrow to confirm the count on it. Thanks for the help, guys.

 

[FIL]

The drive gear or driven gear? Meaning the gear that is inside the transmission or the gear that the speedometer cable plugs into? If it's the driven gear (inserted through the side of the transmission), someone was jerking you around as mine cost about $20 USD.

If it was the gear that sits on the output shaft inside the transmission, then I'm honestly not sure on what that costs

I was hoping that by saying 'the plastic drive gear', he'd know what I meant... probably not though... might ring again in a few days and hope to get a different person...

 

[Dachande]

The 35 tooth driven gear (which comes with a new O-ring and clip) I bought cost me 32 dollars..that unfortunately I cannot return since it's a "special order" item :3d_frown: . Hopefully the correct one won't cost any more than that.

 

[hvyman]

gte's does not come with 4.30 rear end. you either need a driven gear for a 3.90(pre89) or 3.73(89+) r154 not w58. if you gave the parts guy your vin its going to come up with the w58.

 

[Dachande]

I ordered the 32 tooth 3.90 driven gear yesterday and it will be here Monday. In the meantime, if anyone wants this 4.30 driven gear for 20 bucks let me know as I have no use for it!

 

[WhtMa71]

The 35 tooth driven gear (which comes with a new O-ring and clip) I bought cost me 32 dollars..that unfortunately I cannot return since it's a "special order" item :3d_frown: . Hopefully the correct one won't cost any more than that.

Well if they sold you the wrong gear then they should take it back regardless...Or at least exchange it..

 

[Dachande]

No refunds or exchanges on special order parts..and there is a 10% restocking fee even if they did. Really sucks, but not much I can do.

 

[iwannadie]

Isn't your speedo going to be off if you have a 4.3 differential and using a speedo gear for 3.9? Or, did I miss something?

 

[tsuper92]

you can put some higher profile tire's on the back to help offset it a bit.i have a 3.90 gear tran's with a 4.10 rear and with 275/40 tire's out back it wasn't far off