Th350 Only allows Park and Reverse

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Goulet264

Junior Member
Joined
Aug 5, 2023
Posts
15
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5
Location
Canada
First Name
Vince
Truck Year
1981
Truck Model
c10
Engine Size
350
Good morning everyone!

I have been having this issue with my truck, I backed off the driveway and could not put it in drive. I had to reverse all across town and back up home :Big Laugh:.
I checked the linkage from the column and it works fine, the issue is inside the transmission. After taking off the tranny oil pan and playing with the gear lever on the transmission I noticed two spots that prevent movement from reverse to neutral, drive and such.

I have some related pictures, sorry for the green and pink squares I don't know what happened with that.

Does anyone here know the issue? or have a solution?
 

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NickTransmissions

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Aug 3, 2023
Posts
652
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Location
Las Vegas
First Name
Nick
Truck Year
1987
Truck Model
R10
Engine Size
350
Good morning everyone!

I have been having this issue with my truck, I backed off the driveway and could not put it in drive. I had to reverse all across town and back up home :Big Laugh:.
I checked the linkage from the column and it works fine, the issue is inside the transmission. After taking off the tranny oil pan and playing with the gear lever on the transmission I noticed two spots that prevent movement from reverse to neutral, drive and such.

I have some related pictures, sorry for the green and pink squares I don't know what happened with that.

Does anyone here know the issue? or have a solution?
Remove the detent roller and work the manual valve by hand - DO THIS ONLY AFTER YOUR WHEELS ARE CHOCKED OR ALL OFF THE GROUND ON STANDS OR A LIFT!

This will tell you if there's a problem with the manual valve, rooster comb and/or parking rod assembly. If everything moves freely, reinstall the detent roller and torque the bolt to 15 ft lbs and double check the external transmission shift linkage to the column.
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
18,193
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Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
I had this happen to 2 - th350s! All reverse n no forward.
 

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