Thanks WT, for all your assistance. I just took it for a test drive and it works great! I still have to put the boot on there and double check the speed. I actually left the supra speedo sender since I was having trouble separating the elbow from the supra sender.

I'll post back if the Supra speedo is off or not.


M

 

No problem, I've done so much stuff wrong and blown up a whole bunch of stuff through the years so I'm happy to help when I can to keep others from repeating my mistakes.


If you want to have fun with that trans swap the 3.07's out for something around 3.90 or 4.10s. With 4.10's and 25" tall tires I'm running 3100 rpm @ 70. Not ideal for stellar mileage but with the sports car gearing it's a fawking riot.

 

The speedo is off about 5 miles slow. Meaning if I drive the speed limit going by my gauge, I'm actually speeding by about 5 mph. I plan on flushing the oil soon so I'll be able to swap senders. Hopefully that fixes the problem.


Now, I must say that driving with this tranny has been a blast. What a freaking difference. I work in a small tourist town and it has always been very slow stop and go driving. Now I can practically idle in first gear and drive around. Not to mention the long stretch of road home has been a very interesting drive recently. The first four gears are so nice, plus the years of only having 4 gears to begin with, I almost forget there is a fifth. Also it is extremely worth it to get the bushing kit. Shifting feels like I'm working with a brand new transmission. All in all, I love this tranny.

 

When I bought my truck, I was told it had a "celica tranny". Being an original 4spd truck with the 8" 3.07, would a truck 5sp throw off the speedo?

When doing "60" on my speedo, gps says I'm doing "68" and I'm turning 2500rpm.

W58? lol, I hate that toyota didn't mark their trannys...

 

I did the W58 swap a while back. My truck also was a 4 speed with the 3.07 gear. My speedometer is about the same as yours YOguyDA. And I love mine also Mikerocosms.

 

Well I just did the math and I'm about 16.67% slow on my speedometer. So I need something to speed up the spin in my speedo cable. I'm going to call up these guys: Speedometer Service of Milw providing speedometer solutions It was recommended in an older thread. I'll post my results if this works out.

 

Why not just change the driven gear for the speedometer?

 

Ok, I'm still new to this so... Is the "driven gear" in the speedometer itself or is it in the sender, or in the tranny? Then how would I know what gear to change it with?

 

I've seen charts on toyota gears, I'm pretty sure I found one here once.

Either way I'd be swapping the gear with the 4 speed since you already have it.

 

Count the gear teeth. If i remember the w58 has less teeth.

 

Ahhh, I see. Ok. Will do.

 

Ok I got around to changing the gears in the sender. I think that is what you guys meant.

Right off the senders are different, the W58 sender is considerably wider and so are the gears. I have a bad feeling my truck gear won't reach.
My original truck sender is on the left and the Supra sender is on the right. I already had the gear taken out of my truck sender.



Here are the two gears side by side.
Supra gear on left and truck gear on right.



Now here is my pickup gear installed on the Supra sender. It was a bit of a bitch to get the elbow piece to line up and screw in correctly but I got it.



I installed it and just like I thought, my truck gear doesn't make contact inside the tranny so it doesn't work.


Is this what you guys were telling me to do? Or am I all wrong here? I may still have to contact the speedometer service place to have an adjuster made.

 

Ok so it's the "other" style of gear. The 4 speed has what looks like a 4 wheel drive type gear.

Some Speedo gear part numbers from Jeff Watson [Archive] - Toyota CelicaSupra Forums

 

The Supra gear had 33 teeth. My truck gear had 18 if I remember correctly. The numbers were stamped on top of the plastic gears and I counted to make sure.

 

With the help of 90DailyDriven I ordered a 35 tooth gear. Cool thing is it came with a new G clip and O ring for the sending unit. I switched them out and took it for a test drive.



Unfortunately I went the wrong direction and my speedometer actually read slower than it did before. I'm going to leave it in for now. I've got my gps that tells me the correct speed. I had just placed an order for a 17% speed up correction box. It should look something like this (taken from yotatech.com):



Luckily I wasn't out too much $$ for buying the 35 tooth gear. That speedo box cost me $93 shipped. I'll post my results when it gets here.



.

 

My speedo correction box from Commercial Speedometer Service in West Sacramento came in on Saturday. Actual cost was $85 shipped. When I called them I mentioned the percentage off my speedo was. Mine was 16.67%. So he said I needed an increase of 17%. This is what showed up:




I installed my old 33 tooth driven gear and added the speedo correction box inline.




Took it for a test drive and bam, speedo is back to reading correct.




M

 

Revisiting this thread since im about to install my w58. Alot of good info here.