T-350 no reverse, drive in all gears - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-23-2009, 04:36 PM
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T-350 no reverse, drive in all gears

Hey, new guy here need a little help with my 79 Camaro. I picked it up a couple weeks ago and never got down to working on it until now. I noticed the transmission cooler lines needed to be replaced after I found the bottom (I guess return line) was leaking

I took it for a test drive just a couple of blocks to the gas station and back to see how it was. I noticed the leak because there was a lot of smoke coming off the exhaust from burning off the tranny fluid. After I brought it home I figured I would test it and it had no reverse, no neutral but park and drive worked. When engaged in any gear it drove forward, essentialy, all gears were drive gears, no neutral, no reverse just Park and Drive. I assumed this was because of no or low pressure in the lines.

Today I replaced both lines, there are no leaks and I replaced the transmission fluid that was lost and verified the level with the dipstick. Now when engaged in any gear it drives forward. Park, neutral, reverse, drive all go forward when I let off the brake. Is the culprit the shift linkage this time? It does seem pretty loose when shifting I figured that could be the next problem. Would there be any major damage to the transmission if I ran it while it was losing oil? I believe it lost almost a quart and a half but not all in the test drive. Most was lost while replacing the steel lines and from starting and testing the car to check for pressure leaks. Any help is appreciated, thanks!

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Old 10-24-2009, 01:48 PM
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Pull off the pan. I bet the S-link that attaches the rooster comb to the manual valve fell off and is sitting in the bottom of the pan. Put bend it a bit and put it back in so it won't fall out again.

See Fig. 3 Here
http://www.tciauto.com/Products/Inst...50000_inst.htm
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Old 10-24-2009, 04:51 PM
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I'll definitely check that but is there any detailed diagram of the th350? I need to know exactly what I'm looking at and how everything should look. I'm not exactly familiar with auto trannies so this is all new to me.
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Old 10-24-2009, 08:57 PM
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If you need more this is a good book
Turbo Hydra-Matic 350 Handbook by Ron Sessions
http://www.amazon.com/gp/product/0895860511
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Old 10-25-2009, 03:22 AM
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Rear Part dia.>> http://th350.netfirms.com/pages/back.jpg
Page 62>> http://th350.netfirms.com/pages/7a2-62.jpg
Troubleshooting/Repair/Rebuild>> http://th350.netfirms.com/browser.htm
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Old 10-26-2009, 01:15 AM
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Quote:
Originally Posted by SSedan64
Nice, appreciate that! Triaged, I'm assuming you are talking about the little "S" that's found in figure 7A-346 >> CLICK HERE - fig. 7A-346
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Old 10-26-2009, 10:40 AM
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Yes, that S-link. It is in the figure I posted in my first post too but the picture is a bit small.

My guess is you will find it in the pan.
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Old 10-28-2009, 05:30 AM
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I am having the same problem have you dropped the pan and seen if this was the culprit yet?
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Old 10-29-2009, 04:30 PM
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The S-Link was the exact problem, thank you Triaged. I fished it out of the pan and hooked it up, double checked all the gears and ran into another problem. It seems like Park doesn't want to seat fully on the rooster comb when engaged. I tried adjusting the shift cable but when adjusted all the way back, it sits in the middle of Park and Reverse. If I'm looking at this correctly, the rooster comb has park all the way in the deepest groove then all the other gears following in the next 5 grooves? I drew out how I imagine all the gears are supposed to be seated. If it is like that, then when my shifter is in Park, the rooster comb is settled in between park and reverse. The whole rooster comb seems a little loose I think I need to tighten it down and test the shifter again. This is becoming a pain..
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Old 10-29-2009, 04:37 PM
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Glad you got that fixed. Yes it sounds like you have some adjusting to do with the shifter/linkage. What shifter do you have? You might want to look up the manual on the company web page.

There are 2 nuts on the shift shaft. One inside the case to hold on the rooster comb and another on the outside to hold on the linkage. Make sure they are both tight.
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Old 10-29-2009, 07:12 PM
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I'm still on the stock shifter for the 79 Camaro.. I'm just about ready to run out and get something decent. I was looking into the B&M Z-Gate shifters

chlsnk, you should take a look at these youtube videos, it helped me visualize where everything had to be before I got started..
S link disconnected
S link connected, how everything should look put together
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Old 10-29-2009, 08:14 PM
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i may have missed this part of a post .... but,

there is a spring steel U shaped clip that is on the shift shaft to keep the shaft from moving in & out.

the inner nut on the rooster comb must be tight.

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