Good evening:

I have a leak from the drivers side of the tranny where the speedometer connects to the transmission. On my Corvette I repaired the same issue on the Turbo 350 by pulling the item they call the "bullet" and replacing the O ring and re-inserting the items and that cured that leak. Well, I have it up on the lift and I disconnected the speedo cable and the bolt and clamp that holds that piece in transmission. That piece seems to be lodged in the fairly tight. What is the best way to remove it so I can put a new O ring on it? I just want to be sure that it comes out by just pulling it out and not some other procedure. Any info appreciated! Below are a couple pictures of the area I'm referencing!




Next up, I have a Hurst Dual Gate shifter and when I first got the car I was messing with it and not totally understanding the Dual Gate I messed up the cable by "gorillia-ing" the shifter and I replaced it with a GM part (correct part #)! I put it in and adjusted it as best I can. It will sift through all the spots but when in park.....the car will still move. So, I think I I may be off just a bit but would like some advice from experts which way I need to adjust and/or specific adjustment procedures if any one has them.



Thanks for any info you all can provide, I appreciate it,
OLE442

 

I know nothing about the dual gate shifters, so I can’t help you with that. I do know lots of parts are available for them. Hopefully whatever you need is readily available.

The speedometer housing is held in place by just one bolt and retaining bracket. Due to dirt and corrosion, it might take a little muscle to get it out. Once you do, inspect the speedo gear. It’s not uncommon to find the speedo gear shaft worn where the rubber seal rides.

I’ll never understand how rubber can wear a groove in steel (axle seal, harmonic balancer seal, etc). The plastic is harder than the rubber, why does it wear?!

 

The Dual Gate adjustment is an iterative process of trial and error. Adjust the end of travel in either Park or 1st, then move the shifter to the opposite end and verify it's fully engaged in the proper gear; if not, make a small adjustment, and then try both ends of the gear range again. Keep doing this until it engages 1st on one end and Park on the other end of the span.

 

I have been messing around with it for a bit and after using a screwdriver and a hammer, I have tapped on the three raised sections on it and can get it to turn slowly clockwise and back again counter clockwise?? I'm just curious if this is something you can spin around freely when it's not dirty and greasy. The piece on my TH350 in the Corvette slid right out. I'm just trying to be careful because I have had a history of getting carried away and breaking some things....LOL! I also tried threading the end on the speedometer and then using that to pull on it a bit and it really didn't seem to want to come out any!

The shifter adjustment will be dealt with when I get this completed!

 

The only thing that holds the speedometer gear housing in place is the bolt and housing retainer. If the bolt and retainer is out, the housing is stuck on the O-ring.

Spray some penetrating oil around the housing. Screw the cable back onto the housing, get a long screwdriver, and catch the tip of the screwdriver behind the cable collar, and lightly pry against the case.

If the housing will rotate, keep at it. It will come out.

 

Is there a seal in the speedometer cable area too that can leak and might need to be replaced.....besides the O-ring! I've searched a couple other threads on leaks and it sounds like that may also be a possibility for the leak. I'd just as soon replace that too because I don't like "fixing" things multiple times.

Pretty sad for a car with only 47,700 actual miles on it but then, It has sat for more years than it's been driven.

Same with my '76 Vette with less than 50,000 actual miles!

Sitting is worse than driving them ....even if they are garaged!

 

this is what your looking for. Go to any transmission shop, chances are they have a coffee can full of these seals and O-rings. These seals are included in every transmission rebuild kit, but if the transmission they are building is 4wd or uses a speed sensor instead of speedo cable obviously they won’t be used for that rebuild.

The large o-ring goes around the outside of the housing, the small seal goes inside and seals the housing to the speedo gear. The small clip keeps the small seal from walking out of position. You can stack 2 small seals on the housing bore (seal,clip, then another seal) if the leak is persistent.