OK, i have a newer T-5 and it has the electronic speedo and i would like to install it in my car wich has a cable driven speedo. Could i go out and get an electronic speedo assembly (started it what 89??) and install that and wire it up? i dunno you guys need to help me out with this one.

All you need to do is swap the newer electronic speedo connection OUT of the newer T5 for the cable driven sender from an older T5.

One 10mm bolt, slide on out, slide one in, that's it.

This is EXACTLY what I did, and my speedo works just fine.




HTH

Ditto

Yeah, that is what i just found out after going outside and looking at the damned thing for a while. But now my question is I swapped a 9 bolt rear and a T5 from the same car that had a 145 speedo, but i don't have the 145 speedo. I have a 110 and it reas 10mp fast and i would like to fix this, does ne one know what speedo gears i should use and how hard is it gonna be to get into the trans the chagne the drive one? i did a quick calulation on 700r4.com and it gave me Drive gear:15 Driven Gear: 40. Does anyone have ne suggestions on this new problem?

You don't have to do anything.

Mechanical speedos are so simple, they're beyond mere "simple". They're so simple it's embarrassing. Here's how it works:

1 mile = 1000 revolutions of the cable. Therefore, 60 mph = 1000 cable RPM.

Doesn't matter what the speedo scale is; what year car it is; what the tire size is; what gear is in it; what trans it has; nothing else matters. 1 mile = 1000 cable revolutions. It's magic. All numbers. That's how a speedo shop can calibrate your speedo without having your car.

So: if you know how far your tires rotate in one revolution (dependent on their diameter), and you know what your rear gear is, you too can now calculate the correct speedo gears, because you can calculate how many times your drive shaft revolves in one mile, and all you need from there is the speedo gear ratio that returns to 1000 cable revolutions per mile. Of course, you can't buy stuff a 7 : 20.23 gear set, so you're stuck with the level of precision that even integers of teeth give you.

So this is kinda the reverse situation.
I'm swapping in a T-5 from an '84 TA into a '90 Camaro RS.
I've already got the flywheel with one piece seal, but this VSS has me really confused.
Many people are saying I can simply unbolt the cable sender from the T-5, and bolt in an electric VSS (obviously for a T-5). But the guy I bought the flywheel from says he did a similar swap a year or so ago, and had to get another tailstock for his T-5 because the mounting hole size was different. He said the electronic VSS would not fit into the hole left from the cable sender.

Can anyone shed some light on this for me?

Thanks

Al

Well, let's put it this way....

I have a 91 transmission in my 83 car, using the 83 cable speedo housing in the 91 transmission. The 83 cable speedo gear housing is therefore the same size as the VSS that was in the 91. Now I'm not sure that the VSS is the same size as the cable housing; but I'm real sure that the cable housing is the same size as the VSS. And since i'm well known to all as someone who doesn't understand the physical laws governing the behavior of things in this universe, I suppose it could be possible that one number is equal to another, but the second number can be unequal to the first. And 2 + 2 could equal 5, but only for unusually large values of 2.

IIRC I took a pic of the 2 parts side by side and posted it for somebody some time back. Unfortunately I don't have that pic on my hard drive here, so I can't re-post it. I'll see what I can do later.

RB wrote:
Thanks for the knowledge from someone who has been there. You've made it just as plain as it gets...:hail: :lala:

Thanks

Glad I could be of use!!