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#1
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Transmission
My T400 on my 69 has always been hard to shift....cable slides easy, shifter moves freely. Just always hard to shift any thoughts?...
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72 G.T.O. 455HO Auto 69 Firebird 400 Conv. Auto. IAII 540 and damn vroomy.... |
#2
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Sounds like you need to troubleshoot with a process of elimination. I would assume this is a counsel and not a column shift?
I would first disconnect the trans and try the shifter Then you would have to remove the counsel around the shift and remove the shifter cable at that end and try it. Could just be a gummed up shifter mechanism. |
#3
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As i said. Cable slides freely. Shifter is clean and smooth. Just when it's hooked to the trans it is soo stiff. Trans is freshly built, but shifts the same as it did before the rebuilding.
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72 G.T.O. 455HO Auto 69 Firebird 400 Conv. Auto. IAII 540 and damn vroomy.... |
#4
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Oh. Console shift. Dash and column lock out linkages disconnected for header clearance.
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72 G.T.O. 455HO Auto 69 Firebird 400 Conv. Auto. IAII 540 and damn vroomy.... |
#5
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Be sure your geometry is right at the bracket/cable/arm on the trans. Does it shift easy at the trans with the cable disconnected? I had a 67 GTO that shifted like butter.
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1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize. 1977 Trans Am W72 400, TH350, 3.23 T Top Everyone you will ever meet knows something you don't. Bill Nye. |
#6
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Trans seems tight but not excessive. My gto shifts light. Everything looks as it should. Wondering if a longer arm on the trans would help. Might throw everything way off though. Was just wondering if anyone else had this problem.
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72 G.T.O. 455HO Auto 69 Firebird 400 Conv. Auto. IAII 540 and damn vroomy.... |
#7
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Quote:
Any odd shift cable routing?
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"...ridge reamer and ring compressor? Do they have tools like that?" |
#8
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Stock shifter. Straight cable run. Just tore everything apart and cleaned and relubed. What a stiff shift. I'm thinking it must be the trans itself. But it doesn't seem that tight.
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72 G.T.O. 455HO Auto 69 Firebird 400 Conv. Auto. IAII 540 and damn vroomy.... |
#9
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Unless the manual shift valve is sticking in the valve body bore, the only other thing determining tightness is the tension spring/roller riding on the rooster comb/detent. There is a retaining nut and linkage associated with the manual shift shaft to actuate the manual shift valve, maybe something in that nut/linkage came loose. It would require dropping the pan to see it, but is easily accessible after that. In the attached pic, the shift shaft goes in at the bottom right, and has 2 linkages attached: One goes to the park pawl over on the bottom left. The other linkage goes to the manual shift spool valve in the valve body. You can also see the roller tipped piece of spring steel that rides on the "rooster" comb detent. That gives you your "click, click" when you move positions.
If you have already eliminated shifter and cable, then the only thing I could think of is a buggered up linkage. A stuck spool valve seems unlikely if the tranny shifts into all gears.
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"...ridge reamer and ring compressor? Do they have tools like that?" |
#10
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I would double check the cable. I had a new repo cable and worked fine when not installed. But when installed with the slighted bend it was stiff. I bought a a cable from shift works and it works perfect. I believe the have a video on their site that shows what I'm talking about.
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#11
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I remember having heard from someone who installed a repro cable and it was a bit too long and stiffer.
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