Is this a simple adjustment? I took the car out today for the first time since BBG and while crusing in 4th gear, the shifter pops out with no warning. It goes back in normally, no grinding or anything and shifts fine. Not sure what it is, I'm hoping it's an adjustment.. Does anyone have any ideas? The trans has roughly 60 - 75 miles - it's a fresh rebuild. Mike Iggycat NJ
The first thing I would do Mike, is to check the neutral alignment of the rods. Take all the rods off the shifter, put the shifter in neutral and slide a Hurst alignment pin in the shifter. If you dont have an alignment pin, you can use a drill bit. I forget the size though...1/4" maybe? Once the alignment pin is in, the rods should juust slide right into the holes in the shifter. If not, adjust the rods. See if that helps
Read Scot Miller's procedure in this post: http://www.v8buick.com/showthread.php?t=200342 It may not make much of a difference then doing them all at once, but I did mine this way and have had no trouble.
Hi, I have the same issue with my 65 running a Muncie (happens most on deceleration) and a friend of mine had told me that the cases becomes elongated and you have too much end play and that the fix is to install a thrust washer from a T-10 not sure on the particulars as I just been driving mine with my hand on the shifter all the time Other fix is a new case or replacement case Hope this helps you figure it out if the linkage is not your issue
most likely an adjustment to the 3-4 rod at the shifter. I would pop out of 4th on the highway when I let up on the gas. It is not completely engaged and easly slips out.
Bob, thats exactly what mine is doing, when I let-up on the gas pedal, the shifter pops out. I'll check the adjustment. Thanks Mike
Mike I been reading all the forums on this same thing happening with yours with muncie 4 speeds. Possibly the type of gear oil in the trans. I heard anything GL-5 and over and synthetic gear oil can cause this. What is in your trans? George
Mike I havent got a hold of Jeff yet . Just check the alingment of the rods . I certian I have it right . If they are we will need to check run-out of Trans hole on the Bellhousing Nick
Is there a stop adjustment on the shifter? Most aftermarket shifters have a bolt on the front & back sides of the shifter housing that must be properly adjusted to let the shifter fully engage the slider into the synchro & gear. If the bolt is turned in too far the slider will not fully engage the gear causing the problem you are experiencing. If the shifter adjustments are ok then there is an internal problem with hard parts such as the front case bearing, needle bearing inside the input shaft, the input shaft where the needle bearing rides or the end of the output shaft that shaft that rides inside the needle bearing in the input shaft. Also there is a thin spacer between the front bearing & input shaft that moves the input shaft slightly rearward that could be missing. Since your trans was recently rebuilt the hard part problems I have seen and mentioned shouldn't be an issue.
Nick, Gotcha, I'll take it down to Tom GS and put it on his rack and give it a once over. I would prefer it being an adjustment issue rather than taking the trans out and sending it back to Jeff.. Let me know if you speak with him. I'm sure this can be easily rectified. Thanks for your help. P.S. Ever since you tuned the car it runs strong, with the 104 octane boost and a fresh tank of high test, it seems to run better.. I think the engine is finally breaking in and loosening up a little. I was pleasantly surprised on Saturday when I took it out for a short run. It just gets better all the time. George, the trans gear oil is 80 X 90 Lucus oil. Mike Iggycat NJ
Dave, I think the adjustment stops you mentioned are at the top of the shifter. The boot has to be removed to access them. That'll be in review as well. Like I said, the trans works fine, it's quiet and shifts as it should - and it's strong. I hope it's only a slight adjustment. I had a brand new trans in the car when we got it together and it blew 40 feet up my street. When it was rebuilt, it worked fine and shifted with no apparent problems. I found this date coded trans in Michigan and had it rebuilt and installed it. It has less that 75 miles on the rebuild. Mike Iggycat NJ
