TH350 won’t “lock” into Park - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Toro · 11-25-2022, 04:09 PM

I need some help with the adjustment I need to make so shift linkage will stay in park. Normally, once in park, you have to pull back towards you and then down to shift. On mine now, it will go into park, but it doesn’t “lock” there. You can just pull down to place it into gear. What can be adjusted to bring it back where the pull towards you is required to place into gear? 350 with TH350 non-tilt

**kwmech** · 11-25-2022, 05:39 PM

Rack the shifter into park. Block the wheels. Loosen the adjustment nut. climb underneath and make sure it is all the way into at the trans. Make sure the column is all the way in and tighten the nut. That should be it

**HO455** · 11-25-2022, 06:40 PM

If that doesn't solve the problem have someone operate the shifter while you watch the detent mechanism at the bottom of the column.
Mine had a bent tab on the detent that caused that problem for me. Unfortunately when I bent it back in to position it broke off and I had to weld it back on.

Good luck.

**LockDoc** · 11-25-2022, 07:01 PM

-
Before you start changing adjustments and stuff spray some PB Blaster, Liquid Wrench, or something similar into the top of the steering column, where the shift lever goes in. Don't be afraid to stick the nozzle in above and below the lever and give it a good dousing. After you spray it pull the shift lever up toward you and push it back down toward the dash. It should move up and down a couple of inches. Do this 4 or 5 times. This will help free up any sticking in the shift lever tube. The reason the shift lever moves up and down is because it should be pulled back towards you to shift it into and out of the park position.

It wouldn't hurt to spray the bottom end too, where the shifter arm comes out.

LockDoc

Toro · 11-26-2022, 06:40 PM

I think I might have found the problem. It looks like the detent for "park" is significantly worn down. Take a look below. I don't have another to compare it to.

72c20customcamper · 11-26-2022, 06:44 PM

Quote:

Originally Posted by Toro

I think I might have found the problem. It looks like the detent for "park" is significantly worn down. Take a look below. I don't have another to compare it to.

Too much lube .

**HO455** · 11-26-2022, 08:43 PM

Here's a thread by a member with a similar problem and his remedy.

http://67-72chevytrucks.com/vboard/s...d.php?t=811096

11-25-2022, 04:09 PM	#1
Toro Registered User Join Date: Nov 2018 Location: Huntsville, AL Posts: 340	TH350 won’t “lock” into Park I need some help with the adjustment I need to make so shift linkage will stay in park. Normally, once in park, you have to pull back towards you and then down to shift. On mine now, it will go into park, but it doesn’t “lock” there. You can just pull down to place it into gear. What can be adjusted to bring it back where the pull towards you is required to place into gear? 350 with TH350 non-tilt

11-25-2022, 05:39 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,649	Re: TH350 won’t “lock” into Park Rack the shifter into park. Block the wheels. Loosen the adjustment nut. climb underneath and make sure it is all the way into at the trans. Make sure the column is all the way in and tighten the nut. That should be it

11-25-2022, 06:40 PM	#3
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,393	Re: TH350 won’t “lock” into Park If that doesn't solve the problem have someone operate the shifter while you watch the detent mechanism at the bottom of the column. Mine had a bent tab on the detent that caused that problem for me. Unfortunately when I bent it back in to position it broke off and I had to weld it back on. Good luck. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

11-25-2022, 07:01 PM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,815	Re: TH350 won’t “lock” into Park - Before you start changing adjustments and stuff spray some PB Blaster, Liquid Wrench, or something similar into the top of the steering column, where the shift lever goes in. Don't be afraid to stick the nozzle in above and below the lever and give it a good dousing. After you spray it pull the shift lever up toward you and push it back down toward the dash. It should move up and down a couple of inches. Do this 4 or 5 times. This will help free up any sticking in the shift lever tube. The reason the shift lever moves up and down is because it should be pulled back towards you to shift it into and out of the park position. It wouldn't hurt to spray the bottom end too, where the shifter arm comes out. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

11-26-2022, 06:40 PM	#5
Toro Registered User Join Date: Nov 2018 Location: Huntsville, AL Posts: 340	Re: TH350 won’t “lock” into Park I think I might have found the problem. It looks like the detent for "park" is significantly worn down. Take a look below. I don't have another to compare it to. Attached Images

11-26-2022, 08:43 PM	#7
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,393	Re: TH350 won’t “lock” into Park Here's a thread by a member with a similar problem and his remedy. http://67-72chevytrucks.com/vboard/s...d.php?t=811096 __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377



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