74 Blazer TH350 Dipstick Tube Bolt

[Chief Brody]

Anybody have a clue what size bolt and thread that bolt is that holds the transmission dipstick tube in?

It's giving me fits.

 

[76zimmer]

There is only a push in fit to the trans case with a seal that goes between the tube and the case. The bolt that holds the tube to the bellhousing is 3/8, and would be a 9/16 wrench.

 

[Chief Brody]

There is only a push in fit to the trans case with a seal that goes between the tube and the case. The bolt that holds the tube to the bellhousing is 3/8, and would be a 9/16 wrench.

In redneck slang, mine is wollered out...it ain't no 3/8 no more...heck, I put a 1/2 or bigger in it and it tightened down...it's holding it pretty good...looks like some previous owner along the way overdid it and stripped it out.

Man oh man what a hard place to get to. cannot get to it from the bottom...exhaust and front drive shaft are in the way...and it's a loooong stretch across the engine compartment to a tiny little crevice in the back.

I would like to get that properly fixed at some time in the future, but for right now I got the leak stopped.

The old o-ring looked like a rubber band...it had flattened out and stretched and was bearly hanging onto the tube...the thing that drove me crazy figuring out what it was was that it was dropping on the front driveshaft and getting slung...

 

[79rustyk10]

Should be a 1.5" long I think, 3/8" bolt. did it just fall out and the 1/2" bolt threaded into the bellhousing somehow? I dont think there is anyway to tap one of the bellhousing bolt holes to 1/2".

 

[Chief Brody]

Should be a 1.5" long I think, 3/8" bolt. did it just fall out and the 1/2" bolt threaded into the bellhousing somehow? I dont think there is anyway to tap one of the bellhousing bolt holes to 1/2".

I'm not sure...I can't see it...the 1/2 inch threaded in but was about 1/16 too long...so it is slightly loose...the tube will not move up and down, but it moves slightly left to right...you have to push it with a little force...not sure how much, if any, it will move while driving.