Tranny Drip

[Joe Mopar]

Well a couple of days ago I put fluid in the transmission trying to get the car ready for when I start it up.

Now I notice a small drip coming from where the speedometer connects. I'm thinking this is bad. :edgy:

I checked my 64 manual but to be honest it doesn't look like what I have ( the type connection for cable ) I'm thinking the 727 trans. that I have may have come from a 67 GTX. I was told by previous owner that the 440 is from a 67 GTX, so maybe the same with trans. I've put up a pic of the speedometer connection. Can anyone tell by looking at this if it's from a 67? :edgy:

Getting back to the drip. I'm thinking there must be a seal for the speedometer. Would the transmission have to be drained to change this? Is it much of a job?

Thanks,
Joe

 

[roadrunnerman]

i'm thinking there is an O-ring sealthat goes on the hole where your cable connects to,but i have taken that gear out and did not have to drain anything.there will probably be a little fluid on the end of the gear when you take it out,but that will be all.once you unbolt the clamp holding the gear in the tranny,you will see what i mean.

 

[Meep-Meep]

Yeah, like it says above, no need to drain anything but make sure the car is level when you pop it out - Murphy's law you know! There is a small lip seal inside the speedo gear housing that is replaceable and there is an O ring around the gear housing itself. Also make sure you put the gear holder back according to the speedo tooth count.

One reason for the leak is the bore in the gear housing is loose and the shaft moves beyond the limit of the seal. This is also common with the gear selector shaft on the valve body.

 

[Joe Mopar]

Yeah, like it says above, no need to drain anything but make sure the car is level when you pop it out - Murphy's law you know! There is a small lip seal inside the speedo gear housing that is replaceable and there is an O ring around the gear housing itself. Also make sure you put the gear holder back according to the speedo tooth count.

One reason for the leak is the bore in the gear housing is loose and the shaft moves beyond the limit of the seal. This is also common with the gear selector shaft on the valve body.

Meep can you elaborate on the part of putting the gear holer back according to the speedo tooth count?

What do you call this seal? Where would one find one to purchase?

Does anyone have a manual that shows a blown up view of this and could you scan it for me?

Thanks,
Joe

 

[69 Runner]

There is a "pointer" cast in the trans at the edge of the hole where that goes, and ther are numbers on the piece itself. Make note of the number of teeth on your gear, then line up the correct number range with the pointer.

It's pretty self explanatory if you look at it

 

[Joe Mopar]

Can anyone help me out with a part #, name of part or where it can be found? :edgy:

Thanks,

Joe

 

[Meep-Meep]

Meep can you elaborate on the part of putting the gear holer back according to the speedo tooth count?

What do you call this seal? Where would one find one to purchase?

Does anyone have a manual that shows a blown up view of this and could you scan it for me?

Thanks,
Joe

Just like the guy in the corner office says...

If you look closely in your picture toward the bottom you can see the alignment mark (bump) on the tail housing.

Maybe go to your local tranny shop and see if they have the seal by itself. It's really small and fits inside the housing. Another thought is checking McMaster - Carr http://www.mcmaster.com/#lip-seals/=78k90f

 

[Joe Mopar]

Thanks.

Is it a seal or an O-ring? :edgy:

 

[Joe Mopar]

Help, need advise.

First of all the first picture that I will put up shows a group of numbers on the speedometer gear housing cover. Looks like maybe for different positions. Of course I didn't notice this before I took it off so I don't know at where it was set if that is the case. What do these numbers represent?

I don't have a cable to try to attach but if you look at the second and third picture it looks like the threads are cross threaded and banged up unless for some reason they are made like this. :edgy:
If it's no good does anyone have one to sell, or who carry's these?

The gear itself is red and has a 2 and a 6 on it. Does anyone know if my car has 411's in the rear end and I want to put 28 - 29" tires on back if possible if this is the right gear for the speedometer to be somewhat accurate?

Now for the drip! The o-ring on the housing really looks fine, and now that I see how this goes together the drip was coming out of the place where you screw the cable onto. Should there be some kind of o-ring on the gear shaft itself? Is something missing here? I haven't had a cable to put on it, but in the past couple of weeks since I put fluid in the tranny it's dripped out about a quart and a half. Not normal right?

 

[Joe Mopar]

Duh................ok now I'm getting it. By rereading the post above I've found some of my own answers. :grin:

Meep you mentioned a lip seal on the gear shaft which I didn't see. Is it possible that it wore completely off? Or never got put on? :edgy: Now i have to try to find a picture of it or part #. Cross section anything! :yes:

 

[Joe Mopar]

Also still the threads on the cover where the cable screws onto still looks f'ed up to me.

Feed back please. :edgy:

 

[Joe Mopar]

Well I found all the parts needed, but does anyone know what size gear would be good ?

 

[69 Runner]

Yeah, it was cross threaded. The "size gear" you need is determined by the rear end gear and tire size

 

[Manifold]

http://www.jimsautoparts.com/transmission_parts.htm

There's a chart down in the speedo gear section near the bottom of the page which may help. Shows what speedo gear to use based on tire size and rear end ratio.