Search results
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TH350 flush lessons learned
https://www.summitracing.com/parts/der-14200 The transmission fluid shower I enjoyed motivated me to go with the Derale with the plug, then pinched the gasket by over-torquing the bolts ahaha (left a couple loose to balance it out). The whole "inch pounds" thing escaped me. I'm hoping the...- 74flatbed
- Post #12
- Forum: Automatic Transmission
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TH350 flush lessons learned
Ha, indeed. They are fun to work on, but wow do they have a lot of surprises to give. What do you guys think about towing? I have to pull a '69 Biscayne 600 miles pretty soon. Do you think the 74 GMC can handle it? Just a standard 350/TH350 across pretty straight terrain (small hills along...- 74flatbed
- Post #6
- Forum: Automatic Transmission
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TH350 flush lessons learned
I also missed tightening a couple of pan bolts and the guys at Valvoline were nice enough to catch that when they were flushing the radiator for me. Stopped a lot of leaks haha.- 74flatbed
- Post #4
- Forum: Automatic Transmission
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TH350 flush lessons learned
Sorry for delay Art, forgot to follow my post. I actually did run the cooler line into the bucket and kept adding until it came out red. You are 100% correct, I did buy a ton of fluid and am not sure if I made the right choice economically. The original fluid was red, but very watery. I also...- 74flatbed
- Post #3
- Forum: Automatic Transmission
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TH350 flush lessons learned
Hello All, I just thought I would share my pain so others could learn faster: Initial plan: Flush transmission on my truck using a pulled line from the aux oil cooler. I figured I'd flush the cooler and clean out the pan, two birds kind of thing. Actual: Dropped pan and noticed 1/2" of...- 74flatbed
- Thread
- Replies: 14
- Forum: Automatic Transmission
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Stuck valve cover, 350 sbc, 74 GMC
Bought and used the BFM, worked miracles. The old cork gasket had adhesive on both sides and disintegrated with disassembly. Replaced with rubber gaskets, studs, pressure spreaders, and new valve covers. Didn't do the light film of RTV but that will be my next step probably. After the first...- 74flatbed
- Post #8
- Forum: Introduction
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Stuck valve cover, 350 sbc, 74 GMC
I will try, thanks. Any preference on the block being warmed up or not? Other forums have mentioned penetrating oil to loosen it up? The bolts had what looked like RTV on the bottom of them when I took them out so I'm wondering if a previous owner just made their own gasket.- 74flatbed
- Post #4
- Forum: Introduction
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Stuck valve cover, 350 sbc, 74 GMC
Hello, I did a quick search of the threads and couldn't find anything. Is there a technique to use to get off stuck valve covers besides a rubber mallet (I am hesitating, but am going to buy one this weekend). I've had the truck for two weeks and it looks like a previous owner used adhesive...- 74flatbed
- Thread
- Replies: 8
- Forum: Introduction
