Th350 rebuild (lost drive gears)

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Davidj

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greensburg
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David
Truck Year
1986
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Silverado/c10
Engine Size
350cfm
Made a thread a couple weeks ago about running dry on atf and losing all drive gears. Community said “yank it for overhaul” well, I’ve got it torn apart and I’m not sure where the issue was. I have a couple pictures to share and ask opinions on. One is of all the clutches. The ones up top seemed burnt looking but I’m not sure if that’s enough to have caused me to lose drive gears completely. Next is the valve body. When disassembling, one of the valves were pretty difficult to get out. Took quite a bit of turning and pulling when all the others slid out easily. I took a picture with the valve sticking out of the slot that was being a pain. Maybe this was the issue? I appreciate any and all input. Simply asking opinions on what could’ve been the culprit for no drive gears.
 

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Davidj

Member
Joined
Sep 19, 2023
Posts
30
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23
Location
greensburg
First Name
David
Truck Year
1986
Truck Model
Silverado/c10
Engine Size
350cfm
If closer pictures of any other parts are needed, just let me know. May have to describe mentioned part in laymen’s terms though.
 

Matt69olds

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455 Olds
The clutches have definitely seen some heat, but they aren’t burnt. What’s the pump look like?
 

NickTransmissions

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Las Vegas
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Nick
Truck Year
1987
Truck Model
R10
Engine Size
350
Made a thread a couple weeks ago about running dry on atf and losing all drive gears. Community said “yank it for overhaul” well, I’ve got it torn apart and I’m not sure where the issue was. I have a couple pictures to share and ask opinions on. One is of all the clutches. The ones up top seemed burnt looking but I’m not sure if that’s enough to have caused me to lose drive gears completely. Next is the valve body. When disassembling, one of the valves were pretty difficult to get out. Took quite a bit of turning and pulling when all the others slid out easily. I took a picture with the valve sticking out of the slot that was being a pain. Maybe this was the issue? I appreciate any and all input. Simply asking opinions on what could’ve been the culprit for no drive gears.
Where's the forward clutch pack? Dont see it in any of the pics above - what kind of shape is it in?

How are the lip sealing surfaces on the forward clutch piston? Are they hardened, torn, etc?

Direct clutch looks smoked but could be the lighting making it look worse than it is. Intermediate and Low Rev clutch look to have normal wear to some stress.

Is the low roller clutch intact?
 

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