Raider L
Full Access Member
- Joined
- Sep 1, 2020
- Posts
- 1,892
- Reaction score
- 998
- Location
- Shreveport, LA
- First Name
- William
- Truck Year
- 1974
- Truck Model
- C10
- Engine Size
- 355
I've got a problem I need help with my '74 TH350, with 165K on it with no prior problems up to now. It was over hauled back in 1992 and we put a 2000 stall converter in it to unload it from the extra horse power the engine had when we over hauled the engine with all the performance stuff we did to it. I have had this truck for 25+ years. It's a high perf. street machine but I didn't build it to race although it most definately could. I enjoy just knowing the power that we built into it. My hot rodding friends pick on me that I drive it like a old lady going to church. Recently I changed fluid after taking the pan off for a few days. I did not know the trans took as much fluid as it ended up taking. All I had ever done was change the fluid normally. I didn't remember how much we had put in it when we built the truck and put the trans. in. If I had bothered to check the factory manual I clearly says 20 pints, that's 10 qts. plus another four qts. for the converter. The problem I'm having now I don't think has anything to do with the trans being broken because when I'm driving it the trans does okay and operates normally. But for some reason it will shift back to second and I'll have to manually shift to neutral and quickly back to third and it will shift back to third. I can deal with that because it's intermittent. The other thing it does is it will be going along and act suddenly like it's in neutral and it won't go into any gear. I'll be still rolling at street speed and it will suddenly bump into gear and will seemingly be normal. It pulls away from a stop light and shifts through all three gears and may drive a ways and then will do one of those things I mentioned.
All I did was change the fluid and I took the pan off so I could change the screen and put a new modulator valve on it. The one I took off had been on there for twenty-five years I guess it was time to change it. It has a TCI 2 qt. finned cast alum. pan on it and I put in a tubular trans crossmember with a Energy Suspension poly mount on it this last time a couple of months ago and was not driving it. All these problems started after I started driving it again. I took the modulator line off and cleaned it, all new rubber hoses, and found the new mod. valve was out of adjustment and instead of fooling around test driving it after some minor mod. valve adjustment, I just bought a new one. That one did much better. They are supposed to be set at the factory but that one was wrong. This new one was set right. There was other problems I have had with it this time but it would take up to much space to explain it, but now I'm thinking the kick down linkage is out of adjustment. I have a link on the carb that is supposed to work when you change from a 2bbl. to a 4bbl. carb. But it may still not be right. Anybody got any ideas what I can try to solve these weird shifting things going on? Especially the thing when it suddenly seems to be in neutral and goes back in gear somewhat hard. And when it's doing that it won't shift into any gear, and I'm not talking about reverse or park. It would blow the trans up but I'm referring to any of the drive gears.
All I did was change the fluid and I took the pan off so I could change the screen and put a new modulator valve on it. The one I took off had been on there for twenty-five years I guess it was time to change it. It has a TCI 2 qt. finned cast alum. pan on it and I put in a tubular trans crossmember with a Energy Suspension poly mount on it this last time a couple of months ago and was not driving it. All these problems started after I started driving it again. I took the modulator line off and cleaned it, all new rubber hoses, and found the new mod. valve was out of adjustment and instead of fooling around test driving it after some minor mod. valve adjustment, I just bought a new one. That one did much better. They are supposed to be set at the factory but that one was wrong. This new one was set right. There was other problems I have had with it this time but it would take up to much space to explain it, but now I'm thinking the kick down linkage is out of adjustment. I have a link on the carb that is supposed to work when you change from a 2bbl. to a 4bbl. carb. But it may still not be right. Anybody got any ideas what I can try to solve these weird shifting things going on? Especially the thing when it suddenly seems to be in neutral and goes back in gear somewhat hard. And when it's doing that it won't shift into any gear, and I'm not talking about reverse or park. It would blow the trans up but I'm referring to any of the drive gears.