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Transmissions and Drivetrain Need help with your trans? Problems with your axle?

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Old 11-11-2009, 12:44 PM   #1
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Join Date: Dec 2006
Location: Hou. TX
Posts: 4,386
Car: 89 RS, 86 TA
Engine: 6.0 Trex, 5.3 cammed, both carbed
Transmission: T56 CFDFX, TH400 3000stall
Axle/Gears: 4.30 M12, 3.23 gov

Classifieds Rating: (2)
T56 griding when clutch is in

Well, i am dumbfounded. The car would not start, or push start, then i found that it would start if the clutch was not to the floor. I had my buddy tell me his T56 in the 95 Z28 did the same thing so he shimmed the slave out. I shimmed mine as far as possible and it still does it. I can shift at half clutch or so, but more than 3/4 it makes a grinding/clicking noise.

Was worse before shimming, but the clutch and pressure plate are brand new. It is in my 89 RS. This trans shifts perfect, like butta. Got the trans for 300$, but i use my old bellhousing that works fine..

Any idea would help.
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Old 11-11-2009, 02:24 PM   #2
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Join Date: Aug 1999
Location: Elkton MD, USA
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Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac

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Re: T56 griding when clutch is in

Is this a straight LT1 T56 conversion, or a T5-bell+adaptor? What Clutch/PP are you running?
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Old 11-11-2009, 07:03 PM   #3
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Car: '88 GTA
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Re: T56 griding when clutch is in

Which pedals did you use? 3rd or 4th gens?
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Old 11-11-2009, 11:59 PM   #4
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Join Date: Dec 2006
Location: Hou. TX
Posts: 4,386
Car: 89 RS, 86 TA
Engine: 6.0 Trex, 5.3 cammed, both carbed
Transmission: T56 CFDFX, TH400 3000stall
Axle/Gears: 4.30 M12, 3.23 gov

Classifieds Rating: (2)
Re: T56 griding when clutch is in

It is a all LT1 conversion, stock replacement clutch and PP from Fort Wayne clutch.

I am using the 3rd gen pedals, didnt think it would give it cause to make noise.
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Old 11-12-2009, 09:11 AM   #5
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Location: Il
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Car: 88 Iroc-Z
Engine: 305 TPI
Transmission: T-56 Manual
Axle/Gears: 3.23 10 bolt

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Re: T56 griding when clutch is in

My car was doing the same thing. Not as bad (I was able to start it with the clutch in all the way...barely) but the same type of thing. It's pulling the pressure plate too far making the pressure plate hit and rub against something. I shortened the master cylinder rod and now it's perfect. How to do it is near the end of the t56 swap sticky.

Last edited by miner; 11-12-2009 at 09:12 AM. Reason: forgot a couple of words... =/
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Old 11-13-2009, 01:14 AM   #6
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Join Date: Dec 2006
Location: Hou. TX
Posts: 4,386
Car: 89 RS, 86 TA
Engine: 6.0 Trex, 5.3 cammed, both carbed
Transmission: T56 CFDFX, TH400 3000stall
Axle/Gears: 4.30 M12, 3.23 gov

Classifieds Rating: (2)
Re: T56 griding when clutch is in

Yea, i have seen the shortening thing, dont know if i will do it soon, but i will work with it the way it is for now.
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Old 11-16-2009, 09:45 AM   #7
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Car: 1984 Firebird
Engine: 350 carbed
Transmission: T56
Axle/Gears: 3.73

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Re: T56 griding when clutch is in

4th gen pedals will fix it too, i just went through that a couple months ago on my swap
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Old 11-16-2009, 09:45 AM
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